1. The utility model provides a wind generating set's laser lightning triggering control system which characterized in that includes: thunder and lightning signal receiving circuit, laser thunder and lightning start control circuit, laser thunder and lightning emission control circuit, laser thunder and lightning start circuit and laser thunder and lightning emission circuit, wherein:

the lightning signal receiving circuit is connected to the laser lightning triggering start control circuit and the laser lightning triggering emission control circuit and is used for generating corresponding first induction voltage and second induction voltage according to the distance between thunderclouds and the wind generating set, and the second induction voltage is the divided voltage of the first induction voltage;

the laser lightning triggering start control loop at least comprises a first light-emitting diode and a second light-emitting diode which have different light-emitting colors, and is used for controlling the laser lightning triggering start loop to be in a disconnected state when the first induction voltage is smaller than a preset value, and controlling the first light-emitting diode to be in an off state and the second light-emitting diode to be in an on state; when the first induction voltage is larger than or equal to a preset value, controlling the first light-emitting diode to be in a lighting state and the second light-emitting diode to be in a extinguishing state, and controlling the laser lightning triggering starting circuit to be in a conducting state;

the laser lightning triggering emission control loop at least comprises a third light-emitting diode and a fourth light-emitting diode which have different light-emitting colors, and is used for controlling the laser lightning triggering emission loop to be in a disconnection state and controlling the third light-emitting diode and the fourth light-emitting diode to be in a extinguishment state when the first induction voltage is smaller than a preset value; when the first induction voltage is greater than or equal to a preset value and the second induction voltage is smaller than the preset value, the third light-emitting diode is controlled to be in an off state and the fourth light-emitting diode is controlled to be in an on state, and the first induction voltage and the second induction voltage and the laser lightning starting control loop control the laser lightning transmitting loop to be in an off state together; when the second induction voltage is larger than or equal to a preset value, the third light-emitting diode is controlled to be in a lighting state, the fourth light-emitting diode is controlled to be in a extinguishing state, and the third light-emitting diode and the fourth light-emitting diode and the laser lightning triggering starting control loop control the laser lightning triggering transmitting loop to be in a conducting state together;

the laser lightning triggering starting circuit at least comprises a laser lightning triggering starting device and is used for starting the laser lightning triggering starting device in a conducting state;

the laser lightning triggering transmitting loop at least comprises a laser lightning triggering transmitting device and is used for starting the laser lightning triggering transmitting device in a conducting state.

2. The system of claim 1, wherein the lightning signal receiving loop comprises: the lightning arrester of setting at the arrester on fan blade surface, fan cabin top the arrester with the arrester is used in lightning arrester, electric capacity, resistance to lightning arrester, voltmeter, protection that the lightning arrester is respective, wherein: one end of the voltmeter is connected to the lightning receptor and the down conductor of the lightning rod, and the other end of the voltmeter is grounded; the lightning arrester for protection, the capacitor, the resistor and the voltmeter are all connected in parallel, and the resistor comprises a first resistor and a second resistor which are connected in series; the voltmeter with the one end that the downlead is connected is first output, first output exports first induced voltage, first resistance with the tie point of second resistance is the second output, the second output exports second induced voltage.

3. The system of claim 2, wherein the laser ignition start-up control loop further comprises: the circuit comprises a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a first optocoupler, a first relay with a group of normally closed auxiliary contacts, a second relay with two groups of normally open auxiliary contacts, a built-in direct-current power supply and a first triode; wherein:

one end of the third resistor is connected with the first output end, the other end of the third resistor is connected with a first binding post of the first optical coupler, and a second binding post of the first optical coupler is grounded;

one end of the fourth resistor is connected with the built-in direct current power supply, the other end of the fourth resistor is connected with a third binding post of the first optical coupler, a fourth binding post of the first optical coupler is connected with one end of the second relay, the other end of the second relay is connected to one end of the fifth resistor and the base of the first triode, the other end of the fifth resistor is connected with the anode of the first light-emitting diode, and the cathode of the first light-emitting diode is grounded;

one end of the sixth resistor is connected with the built-in direct current power supply, the other end of the sixth resistor is connected to the collector of the first triode and one end of the first relay, the emitter of the first triode is grounded, the other end of the first relay is connected with one end of the seventh resistor, the other end of the seventh resistor is connected with the anode of the second light-emitting diode, and the cathode of the second light-emitting diode is grounded.

4. The system of claim 3, wherein the first LED emits light in a red color and the second LED emits light in a green color.

5. The system of claim 3, wherein the laser ignition control loop further comprises: eighth resistance, ninth resistance, tenth resistance, eleventh resistance, twelfth resistance, second opto-coupler, third relay, second triode and the built-in DC power supply that has a set of normally open auxiliary contact, wherein:

one end of the eighth resistor is connected with the second output end, the other end of the eighth resistor is connected with a first binding post of the second optical coupler, and a second binding post of the second optical coupler is grounded;

one end of the ninth resistor is connected with the built-in direct current power supply, the other end of the ninth resistor is connected with a third binding post of the second optical coupler, a fourth binding post of the second optical coupler is connected with one end of the third relay, the other end of the third relay is connected to one end of the tenth resistor and the base of the second triode, the other end of the tenth resistor is connected with the anode of the third light-emitting diode, and the cathode of the third light-emitting diode is grounded;

one end of the eleventh resistor is connected to the internal dc power supply, the other end of the eleventh resistor is connected to a collector of the second transistor and one of the second set of normally open auxiliary contacts in the second relay, an emitter of the second transistor is grounded, the other of the second set of normally open auxiliary contacts in the second relay is connected to one end of the twelfth resistor, the other end of the twelfth resistor is connected to an anode of the fourth light emitting diode, and a cathode of the fourth light emitting diode is grounded.

6. The system of claim 5, wherein the third LED emits light in a red color and the fourth LED emits light in a green color.

7. The system of claim 5, wherein the laser lightning strike starting circuit further comprises a first alternating current power supply and a first normally open overhaul switch, one end of the first normally open overhaul switch is connected with one end of the first alternating current power supply, and the other end of the first normally open overhaul switch is connected to a first input end of the laser lightning strike starting device; one end of the alternating current power supply is also connected with one contact in a group of normally closed auxiliary contacts of the first relay, the other contact in the group of normally closed auxiliary contacts of the first relay is connected with one contact in a first group of normally open auxiliary contacts of the second relay, the other contact in the first group of normally open auxiliary contacts of the second relay is connected to the first input end of the laser lightning triggering starting device, and the second input end of the laser lightning triggering starting device is connected with the other end of the first alternating current power supply.

8. The system according to claim 5, characterized in that the laser lightning triggering emission circuit further comprises a second normally open overhaul switch and a second alternating current power supply, wherein one end of the second normally open overhaul switch is connected with one end of the second alternating current power supply, and the other end of the second normally open overhaul switch is connected with the first input end of the laser lightning triggering emission device; one end of the second alternating current power supply is also connected with one contact of a group of normally closed auxiliary contacts of the first relay, the other contact of the group of normally closed auxiliary contacts of the first relay is connected with one contact of a group of normally open auxiliary contacts of the second relay, the other contact of the group of normally open auxiliary contacts of the second relay is connected with one contact of a group of normally open auxiliary contacts of the third relay, the other contact of the group of normally open auxiliary contacts of the third relay is connected to the first input end of the laser lightning triggering and emitting device, and the second input end of the laser lightning triggering and emitting device is connected with the other end of the second alternating current power supply.

Background

Among the prior art, wind generating set's lightning protection measure is to install discoid arrester additional on fan blade, install the lightning rod additional outside the cabin, then the downlead through the inside downlead of fan blade and lightning rod, draw and connect the equipotential junction in fan cabin, the equipotential in cabin and wind-driven generator tower bobbin base equipotential are through drawing bus connection down, equipotential and wind generating set ground net bottom the wind-driven generator tower bobbin base are connected, form a complete earial drainage passageway.

However, although some metal lightning receiving discs are installed on the surface of the fan blade, the probability of damage caused by lightning strike is still high, mainly because the material of the blade is generally non-metal, and both the length and the surface area are relatively large, the area of the metal lightning receiving disc relative to the blade is small, and from the structural point of view of the fan blade, the number of the lightning receiving discs is not too large, and when lightning strikes the fan blade, the lightning does not necessarily strike the metal lightning receiving disc on the surface of the blade exactly, so that the blade may be damaged.

Disclosure of Invention

In order to solve the technical problem or at least partially solve the technical problem, the invention provides a laser lightning triggering control system of a wind generating set.

The invention provides a laser lightning triggering control system of a wind generating set, which comprises: thunder and lightning signal receiving circuit, laser thunder and lightning start control circuit, laser thunder and lightning emission control circuit, laser thunder and lightning start circuit and laser thunder and lightning emission circuit, wherein:

the lightning signal receiving circuit is connected to the laser lightning triggering start control circuit and the laser lightning triggering emission control circuit and is used for generating corresponding first induction voltage and second induction voltage according to the distance between thunderclouds and the wind generating set, and the second induction voltage is the divided voltage of the first induction voltage;

the laser lightning triggering start control loop at least comprises a first light-emitting diode and a second light-emitting diode which have different light-emitting colors, and is used for controlling the laser lightning triggering start loop to be in a disconnected state when the first induction voltage is smaller than a preset value, and controlling the first light-emitting diode to be in an off state and the second light-emitting diode to be in an on state; when the first induction voltage is larger than or equal to a preset value, controlling the first light-emitting diode to be in a lighting state and the second light-emitting diode to be in a extinguishing state, and controlling the laser lightning triggering starting circuit to be in a conducting state;

the laser lightning triggering emission control loop at least comprises a third light-emitting diode and a fourth light-emitting diode which have different light-emitting colors, and is used for controlling the laser lightning triggering emission loop to be in a disconnection state and controlling the third light-emitting diode and the fourth light-emitting diode to be in a extinguishment state when the first induction voltage is smaller than a preset value; when the first induction voltage is greater than or equal to a preset value and the second induction voltage is smaller than the preset value, the third light-emitting diode is controlled to be in an off state and the fourth light-emitting diode is controlled to be in an on state, and the first induction voltage and the second induction voltage and the laser lightning starting control loop control the laser lightning transmitting loop to be in an off state together; when the second induction voltage is larger than or equal to a preset value, the third light-emitting diode is controlled to be in a lighting state, the fourth light-emitting diode is controlled to be in a extinguishing state, and the third light-emitting diode and the fourth light-emitting diode and the laser lightning triggering starting control loop control the laser lightning triggering transmitting loop to be in a conducting state together;

the laser lightning triggering starting circuit at least comprises a laser lightning triggering starting device and is used for starting the laser lightning triggering starting device in a conducting state;

the laser lightning triggering transmitting loop at least comprises a laser lightning triggering transmitting device and is used for starting the laser lightning triggering transmitting device in a conducting state.

According to the laser lightning triggering control system of the wind generating set, the lightning signal receiving circuit induces a first induction voltage and a second induction voltage which are different according to the distance between thundercloud and the wind generating set, the first induction voltage is used as the starting voltage of the laser lightning triggering starting control circuit, the second induction voltage is used as the starting voltage of the laser lightning triggering transmitting control circuit, and then the laser lightning triggering starting control circuit and the laser lightning triggering transmitting control circuit are used for controlling the connection or disconnection of the laser lightning triggering starting circuit and the laser lightning triggering transmitting circuit, so that the working states of the laser lightning triggering starting device and the laser lightning triggering transmitting device are controlled. And the conducting conditions in the two control loops are displayed by using the light-emitting diodes with different light-emitting colors, so that a user can know the working state of each module in the whole control system through the light-emitting diodes. When thundercloud is nearer to wind generating set, laser induced lightning starting drive and laser induced lightning emitter can be started, and laser induced lightning emitter sends laser, lets thunder and lightning hit the outer lightning rod of aircraft cabin along laser channel in advance, then makes the lightning current discharge to the ground along the downlead, realizes wind generating set's lightning protection to it is impaired to reduce the blade.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

Fig. 1 is a circuit schematic diagram of a laser lightning strike control system of a wind generating set provided by the invention.

Reference numerals: a first resistance-R1; a second resistance-R2; a third resistor-R3; a fourth resistor-R4; a fifth resistor-R5; a sixth resistor-R6; a seventh resistor-R7; an eighth resistor-R8, a ninth resistor-R9; a tenth resistance-R10; an eleventh resistance-R11; a twelfth resistor-R12; a built-in direct current power supply-VCC; a first relay-JDQ 1; a second relay-JDQ 2; a third relay-JDQ 3; a first transistor-Q1; a second transistor-Q2; a first light emitting diode-D1; a second light emitting diode-D2; a third light emitting diode-D3; a fourth light emitting diode-D4; a capacitance-C; a first optocoupler-E1; a second optocoupler-E2; contacts-a 1, a2 of the relay; a first normally open service switch-GL 1; and a second normally open service switch-GL 2.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In a first aspect, the present invention provides a laser lightning triggering control system for a wind generating set, the system comprising: thunder and lightning signal receiving circuit, laser thunder and lightning start control circuit, laser thunder and lightning emission control circuit, laser thunder and lightning start circuit and laser thunder and lightning emission circuit, wherein:

the lightning signal receiving circuit is connected to the laser lightning triggering start control circuit and the laser lightning triggering emission control circuit and is used for generating corresponding first induction voltage and second induction voltage according to the distance between thunderclouds and the wind generating set, and the second induction voltage is the divided voltage of the first induction voltage;

the laser lightning triggering start control loop at least comprises a first light-emitting diode and a second light-emitting diode which have different light-emitting colors, and is used for controlling the laser lightning triggering start loop to be in a disconnected state when the first induction voltage is smaller than a preset value, and controlling the first light-emitting diode to be in an off state and the second light-emitting diode to be in an on state; when the first induction voltage is larger than or equal to a preset value, controlling the first light-emitting diode to be in a lighting state and the second light-emitting diode to be in a extinguishing state, and controlling the laser lightning triggering starting circuit to be in a conducting state;

the laser lightning triggering emission control loop at least comprises a third light-emitting diode and a fourth light-emitting diode which have different light-emitting colors, and is used for controlling the laser lightning triggering emission loop to be in a disconnection state and controlling the third light-emitting diode and the fourth light-emitting diode to be in a extinguishment state when the first induction voltage is smaller than a preset value; when the first induction voltage is greater than or equal to a preset value and the second induction voltage is smaller than the preset value, the third light-emitting diode is controlled to be in an off state and the fourth light-emitting diode is controlled to be in an on state, and the first induction voltage and the second induction voltage and the laser lightning starting control loop control the laser lightning transmitting loop to be in an off state together; when the second induction voltage is larger than or equal to a preset value, the third light-emitting diode is controlled to be in a lighting state, the fourth light-emitting diode is controlled to be in a extinguishing state, and the third light-emitting diode and the fourth light-emitting diode and the laser lightning triggering starting control loop control the laser lightning triggering transmitting loop to be in a conducting state together;

the laser lightning triggering starting circuit at least comprises a laser lightning triggering starting device and is used for starting the laser lightning triggering starting device in a conducting state;

the laser lightning triggering transmitting loop at least comprises a laser lightning triggering transmitting device, is used for starting the laser lightning triggering transmitting device in a conducting state, and is used for starting the laser lightning triggering transmitting device in the conducting state.

In the laser lightning triggering control system provided by the invention, the lightning signal receiving circuit induces two different first induced voltages and second induced voltages according to the distance between thundercloud and the wind generating set, the first induced voltage is used as the starting voltage of the laser lightning triggering starting control circuit, the second induced voltage is used as the starting voltage of the laser lightning triggering emission control circuit, and the laser lightning triggering starting control circuit and the laser lightning triggering emission control circuit are used for controlling the connection or disconnection of the laser lightning triggering starting circuit and the laser lightning triggering emission circuit, so that the working states of the laser lightning triggering starting device and the laser lightning triggering emission device are controlled. And the conducting conditions in the two control loops are displayed by using the light-emitting diodes with different light-emitting colors, so that a user can know the working state of each module in the whole control system through the light-emitting diodes. When thundercloud is nearer to wind generating set, laser induced lightning starting drive and laser induced lightning emitter can be started, and laser induced lightning emitter sends laser, lets thunder and lightning hit the outer lightning rod of aircraft cabin along laser channel in advance, then makes the lightning current discharge to the ground along the downlead, realizes wind generating set's lightning protection to it is impaired to reduce the blade.

It can be understood that after the thunder disappears, the laser lightning initiation device and the laser lightning initiation device are restored to the original non-working state through the system.

It can be understood that the laser lightning triggering starting circuit can enter a heat engine state after being started, and the heat engine is a standby state, the heat engine is a premise that the laser lightning triggering transmitting device transmits laser, and the laser lightning triggering transmitting device can transmit laser only when the laser lightning triggering starting circuit enters the heat engine state. The laser lightning triggering starting device enters the thermal engine body, and after the laser lightning triggering transmitting device is started, lightning in thundercloud reaches the lightning rod area along the laser channel, and the lightning is discharged to the ground through the discharge channel of the wind generating set.

The lightning signal receiving circuit may be implemented in various structural forms, and one of the following structures is described as shown in fig. 1, and the lightning signal receiving circuit includes: the lightning arrester of setting at the arrester on fan blade surface, fan cabin top the arrester with the respective downlead of lightning arrester, voltmeter, protection are with arrester, electric capacity C, resistance, wherein: one end of the voltmeter is connected to the lightning receptor and the down conductor of the lightning rod, and the other end of the voltmeter is grounded; the lightning arrester for protection, the capacitor C, the resistor and the voltmeter are all connected in parallel, and the resistor comprises a first resistor R1 and a second resistor R2 which are connected in series; the voltmeter with the one end that the downlead is connected is first output, first output exports first induced voltage, first resistance R1 with the tie point of second resistance R2 is the second output, the second output exports second induced voltage.

That is to say, the lightning receptor on the surface of the fan blade and the lightning rod on the top of the fan cabin are connected with one end of the voltmeter through respective downlead, the other end of the voltmeter is grounded, and the lightning receptor and the lightning rod play a role in receiving induced electricity in thunderclouds. The lightning arrester for protection is connected with the voltmeter in parallel. The capacitor C is connected with the voltmeter in parallel and plays a role in storing electric energy. The first resistor R1 and the second resistor R2 are connected in series and then connected in parallel with the capacitor C to play a role in voltage division.

The lightning signal receiving loop is provided with two output ends, the two output ends can output different induction voltages, the first output end outputs a voltage value detected by the voltmeter, and the second output end outputs a voltage value detected by the voltmeter and divided by the voltage. The first output end is connected with the laser lightning triggering starting control loop, and the second output end is connected with the laser lightning triggering emission control loop, wherein the specific connection mode is described in the following.

When the area of the wind generating set is not thunder and lightning, the lightning receptor on the surface of the fan blade and the lightning rod on the top of the fan cabin do not have induced voltage. The voltage values output by the first output end and the second output end are both 0. When thundercloud just appears in wind generating set's the region, less induced voltage can appear in the lightning arrester at fan blade surface and fan cabin top, and the induced voltage of first output can start first opto-coupler E1 in the laser induced lightning start control return circuit, and the induced voltage of second output is very little, can not start second opto-coupler E2 in the laser induced lightning emission control return circuit. When thundercloud is close to the wind generating set region and lightning strike does not occur, the lightning receptor on the surface of the fan blade and the lightning rod at the top of the fan cabin can generate large induced voltage, the induced voltage output by the first output end can start the first optical coupler E1 in the laser lightning triggering starting control loop, and the induced voltage output by the second output end can also start the second optical coupler E2 in the laser lightning triggering transmitting control loop. Therefore, the closer the distance between the thundercloud and the wind generating set is, the larger the generated induction voltage is. For the sake of convenience of distinction, the induced voltage output by the first output terminal may be referred to as a first induced voltage, and the induced voltage output by the second output terminal may be referred to as a second induced voltage.

Wherein, laser lightning triggering start-up control circuit can adopt multiple structural style to realize, provides one kind below: the laser lightning strike start control circuit includes, in addition to the first light emitting diode D1 and the second light emitting diode D2: a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, a first optical coupler E1, a first relay JDQ1 with a set of normally closed auxiliary contacts, a second relay JDQ2 with two sets of normally open auxiliary contacts, a built-in direct-current power supply VCC and a first triode Q1; wherein: one end of the third resistor R3 is connected with the first output end, the other end of the third resistor R3 is connected with a first terminal of the first optical coupler E1, and a second terminal of the first optical coupler E1 is grounded; one end of the fourth resistor R4 is connected to the internal dc power VCC, the other end of the fourth resistor R4 is connected to the third terminal of the first optocoupler E1, the fourth terminal of the first optocoupler E1 is connected to one end of the second relay JDQ2, the other end of the second relay JDQ2 is connected to one end of the fifth resistor R5 and the base of the first triode Q1, the other end of the fifth resistor R5 is connected to the anode of the first light emitting diode D1, and the cathode of the first light emitting diode D1 is grounded; one end of the sixth resistor R6 is connected to the internal dc power VCC, the other end of the sixth resistor R6 is connected to the collector of the first triode Q1 and one end of the first relay JDQ1, the emitter of the first triode Q1 is grounded, the other end of the first relay JDQ1 is connected to one end of the seventh resistor R7, the other end of the seventh resistor R7 is connected to the anode of the second light emitting diode D2, and the cathode of the second light emitting diode D2 is grounded.

The third resistor R3 plays a role of protecting the first optocoupler E1. The built-in direct current power supply VCC is connected with a fourth resistor R4 in series and then is connected to a third binding post of a first optical coupler E1, a fourth binding post of the first optical coupler E1 is connected with a contact A1 at one end of a second relay JDQ2, a contact A2 at the other end of the second relay JDQ2 is connected with a base b of a first triode Q1, the base b is connected with a fifth resistor R5 and the anode of a first light-emitting diode D1 in series, and the cathode of the first light-emitting diode D1 is grounded. The built-in direct current power supply VCC is connected in series with a sixth resistor R6 and then connected to the collector c of the first triode Q1, meanwhile, the sixth resistor R6 is connected with a contact A1 at one end of the first relay JDQ1, a contact A2 at the other end of the first relay JDQ1 is connected with a seventh resistor R7 and then connected in series with the anode of the second light-emitting diode D2, and the cathode of the second light-emitting diode D2 is grounded.

The light emitting color of the first light emitting diode D1 may be red, and the light emitting color of the second light emitting diode D2 may be green.

In specific implementation, the laser lightning triggering emission control loop can be realized by various structural forms, and one of the following forms is provided: besides the third light emitting diode D3 and the fourth light emitting diode D4, the laser lightning triggering emission control loop further comprises: an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a second optocoupler E2, a third relay JDQ3 having a set of normally open auxiliary contacts, a second triode Q2 and a built-in DC power supply VCC, wherein: one end of the eighth resistor R8 is connected with the second output end, the other end of the eighth resistor R8 is connected with a first terminal of the second optical coupler E2, and a second terminal of the second optical coupler E2 is grounded; one end of the ninth resistor R9 is connected to the internal dc power VCC, the other end of the ninth resistor R9 is connected to the third terminal of the second optocoupler E2, the fourth terminal of the second optocoupler E2 is connected to one end of the third relay JDQ3, the other end of the third relay JDQ3 is connected to one end of the tenth resistor R10 and the base of the second triode Q2, the other end of the tenth resistor R10 is connected to the anode of the third light emitting diode D3, and the cathode of the third light emitting diode D3 is grounded; one end of the eleventh resistor R11 is connected to the internal dc power VCC, the other end of the eleventh resistor R11 is connected to the collector of the second transistor Q2 and one of the second set of normally open auxiliary contacts in the second relay JDQ2, the emitter of the second transistor Q2 is grounded, the other of the second set of normally open auxiliary contacts in the second relay JDQ2 is connected to one end of the twelfth resistor R12, the other end of the twelfth resistor R12 is connected to the anode of the fourth light emitting diode D4, and the cathode of the fourth light emitting diode D4 is grounded.

That is, one end of the eighth resistor R8 is connected to the second output end, that is, to the connection point of the first resistor R1 and the second resistor R2, the other end of the eighth resistor R8 is connected to the first terminal of the second optocoupler E2, and the second resistor R2 plays a role in protecting the second optocoupler E2. A built-in direct-current power supply VCC is connected with a ninth resistor R9 in series and then is connected with a third binding post of a second optocoupler E2, a fourth binding post of the second optocoupler E2 is connected with a contact A1 at one end of a third relay JDQ3, a contact A2 at the other end of the third relay JDQ3 is connected with a base b of a second triode Q2, and is connected with a tenth resistor R10 and the anode of a third light-emitting diode D3 in series, and the cathode of the third light-emitting diode D3 is grounded. The built-in direct current power supply VCC is connected in series with an eleventh resistor R11 and then connected to the collector c of the second triode Q2, meanwhile, the eleventh resistor R11 is connected with a normally open auxiliary contact 3 of the second relay JDQ2, a normally open auxiliary contact 4 of the second relay JDQ2 is connected with a twelfth resistor R12 and then connected in series with the anode of the fourth light emitting diode D4, and the cathode of the fourth light emitting diode D4 is grounded.

The light emitting color of the third light emitting diode D3 may be red, and the light emitting color of the fourth light emitting diode D4 may be green.

The laser lightning triggering starting circuit can be realized by adopting various structural forms, wherein one of the structural forms is as follows: besides the laser lightning triggering starting device, the laser lightning triggering starting circuit also comprises: the laser lightning protection starting device comprises a first alternating current power supply and a first normally-open overhaul switch GL1, wherein one end of the first normally-open overhaul switch GL1 is connected with one end of the first alternating current power supply, and the other end of the first normally-open overhaul switch GL1 is connected to a first input end of the laser lightning protection starting device; one end of the alternating current power supply is also connected with one contact of a group of normally closed auxiliary contacts of the first relay JDQ1, the other contact of a group of normally closed auxiliary contacts of the first relay JDQ1 is connected with one contact of a first group of normally open auxiliary contacts of the second relay JDQ2, the other contact of the first group of normally open auxiliary contacts of the second relay JDQ2 is connected to the first input end of the laser lightning triggering starting device, and the second input end of the laser lightning triggering starting device is connected with the other end of the first alternating current power supply.

That is to say, one end of the first normally open inspection switch GL1 is connected with the normally closed auxiliary contact 1 of the first relay JDQ1, the normally closed auxiliary contact 2 of the first relay JDQ1 is connected with the normally open auxiliary contact 1 of the second relay JDQ2, the normally open auxiliary contact 2 of the second relay JDQ2 is connected with the first terminal of the laser lightning initiating device, and the other end of the first normally open inspection switch GL1 is connected with the normally open auxiliary contact 2 of the second relay JDQ 2. And a second binding post of the laser lightning triggering starting device is connected to the other end of the first alternating current power supply.

It can be understood that when the two normally closed auxiliary contacts of the first relay JDQ1 are closed and the two normally open auxiliary contacts of the second relay JDQ2 are closed, the laser lightning initiating circuit is in a conducting state, and at this time, the laser lightning initiating device is started to enter a heat engine state. When two normally-closed auxiliary contacts of the first relay JDQ1 are disconnected or two normally-open auxiliary contacts of the second relay JDQ2 are disconnected, the laser lightning triggering starting circuit is in an open state, and the laser lightning triggering starting device is not started at the moment.

The laser lightning triggering transmitting loop can be realized by adopting various structural forms, and one of the following structures is introduced: the laser lightning triggering transmitting circuit comprises a second normally-open overhauling switch GL2 and a second alternating current power supply besides the laser lightning triggering transmitting device, wherein one end of the second normally-open overhauling switch GL2 is connected with one end of the second alternating current power supply, and the other end of the second normally-open overhauling switch GL2 is connected with a first input end of the laser lightning triggering transmitting device; one end of the second alternating current power supply is also connected with one of a group of normally closed auxiliary contacts of the first relay JDQ1, the other one of a group of normally closed auxiliary contacts of the first relay JDQ1 is connected with one of a first group of normally open auxiliary contacts of the second relay JDQ2, the other one of the first group of normally open auxiliary contacts of the second relay JDQ2 is connected with one of a group of normally open auxiliary contacts of the third relay JDQ3, the other one of a group of normally open auxiliary contacts of the third relay JDQ3 is connected to the first input end of the laser lightning triggering device, and the second input end of the laser lightning triggering device is connected with the other end of the second alternating current power supply.

That is to say, one end of the second normally-open overhaul switch GL2 is connected with the normally-closed auxiliary contact 1 of the first relay JDQ1, the normally-closed auxiliary contact 2 of the first relay JDQ1 is connected with the normally-open auxiliary contact 1 of the second relay JDQ2, the normally-open auxiliary contact 2 of the second relay JDQ2 is connected with the normally-open auxiliary contact 1 of the third relay JDQ3, the normally-open auxiliary contact 2 of the third relay JDQ3 is connected with the first terminal of the laser lightning striking emission device, one end of the second normally-open overhaul switch GL2 is connected with the normally-closed auxiliary contact 1 of the first relay JDQ1, the other end is connected with the normally-open auxiliary contact 2 of the third relay JDQ3, and the second terminal of the laser lightning striking emission device is connected with the other end of the second alternating current power supply.

It can be understood that when the two normally closed auxiliary contacts of the first relay JDQ1 are closed, the two normally open auxiliary contacts of the second relay JDQ2 are closed, and the two normally open auxiliary contacts of the third relay JDQ3 are closed, the laser lightning strike emission circuit is turned on, and at this time, the laser lightning strike emission device is started, and when the two normally closed auxiliary contacts of the first relay JDQ1 are opened, the two normally open auxiliary contacts of the second relay JDQ2 are opened, or the two normally open auxiliary contacts of the third relay JDQ3 are opened, the laser lightning strike emission circuit is turned off, and at this time, the laser lightning strike emission device is not started.

The working principle of the laser lightning triggering control system of the wind generating set shown in fig. 1 is described in three cases:

(1) when the area of the wind generating set is not thunder and lightning, the lightning receptor on the surface of the fan blade and the lightning rod on the top of the fan cabin do not have induced voltage. The indication number of the voltmeter in the lightning signal receiving loop is zero. No voltage is applied to two ends of the capacitor C, no current flows between the first binding post and the second binding post of the first optical coupler E1, and therefore the first optical coupler E1 stops working. At this time, a loop formed by the built-in direct-current power supply VCC, the fourth resistor R4, the third binding post of the first optical coupler E1, the fourth binding post of the first optical coupler E1, the second relay JDQ2, the fifth resistor R5 and the first light-emitting diode D1 is in an off state, so that the first light-emitting diode D1 is in an off state, meanwhile, the second relay JDQ2 is not electrified, and two sets of normally-open auxiliary nodes 1, 2 and 3, 4 are all disconnected. Because the voltage of the fourth binding post of the first optocoupler E1 is zero, the first triode stops working, and a loop formed by the built-in dc power VCC, the sixth resistor R6, and the first triode Q1 is in an off state. And a loop formed by the built-in direct current power supply VCC, the sixth resistor R6, the first relay JDQ1, the seventh resistor R7 and the second light emitting diode D2 is conducted, so that the second light emitting diode D2 is lightened, the first relay JDQ1 is electrified, and the normally closed auxiliary nodes 1 and 2 are disconnected.

Further, since no voltage is present across the second resistor R2, no current flows through the first terminal and the second terminal of the second optocoupler E2, and thus the second optocoupler E2 stops operating. At the moment, a loop formed by a built-in direct-current power supply VCC, a ninth resistor R9, a third binding post and a fourth binding post of a second optocoupler E2, a third relay JDQ3, a tenth resistor R10 and a third light-emitting diode D3 is disconnected, the third light-emitting diode is extinguished, the third relay JDQ3 is not electrified, and normally-open auxiliary points 1 and 2 of the third relay JDQ3 are disconnected. Because the voltage of the fourth binding post of the second optocoupler E2 is zero, the second triode stops working, and the loop formed by the internal dc power VCC, the eleventh resistor R11, and the second triode Q2 is disconnected. At this time, the second relay JDQ2 is not charged, and the normally open auxiliary contacts 3 and 4 are opened, so that the circuit formed by the built-in dc power supply VCC, the eleventh resistor R11, the normally open auxiliary contacts 3 and 4 of the second relay JDQ2, the twelfth resistor R12, and the fourth light emitting diode D4 is opened, and the fourth light emitting diode D4 is turned off. Because the first relay JDQ1 is in a point state, the normally closed auxiliary contacts 1 and 2 are disconnected, the second relay JDQ2 and the third relay JDQ3 are not electrified, and the normally open auxiliary contacts 1 and 2 are disconnected, the laser lightning strike starting circuit and the laser lightning strike transmitting circuit are both disconnected.

In summary, when the area of the wind generating set is not in lightning, only the second light emitting diode D2 in the laser lightning triggering start-up control loop is lighted, and the light emitting color is green. The laser lightning triggering starting circuit and the laser lightning triggering transmitting circuit are both disconnected, and the laser lightning triggering starting device and the laser lightning triggering transmitting device are not started.

(2) When thundercloud just appears in the area of the wind generating set, a lightning receptor on the surface of the fan blade and a lightning rod on the top of a fan cabin can generate smaller induced voltage. The voltmeter in the lightning signal receiving loop shows the number. A small voltage is applied across the capacitor C, and a current flows through the first terminal and the second terminal of the first optocoupler E1, so that the first optocoupler E1 works normally. At this time, a loop formed by the built-in direct-current power supply VCC, the fourth resistor R4, the third binding post and the fourth binding post of the first optocoupler E1, the second relay JDQ2, the fifth resistor R5 and the first light-emitting diode D1 is switched on, so that the first light-emitting diode D1 is lightened and emits red light, the second relay JDQ2 is electrified, and 2 groups of normally-open auxiliary nodes 1, 2, 3 and 4 are all closed. Due to the fifth resistor R5, a voltage is present at the base b of the first transistor Q1, thereby turning on the first transistor Q1. And a loop formed by the built-in direct current power supply VCC, the sixth resistor R6 and the first triode Q1 is conducted. Because the first triode Q1 is turned on, no current passes through a loop formed by the first relay JDQ1, the seventh resistor R7 and the second light emitting diode D2, at this time, the second light emitting diode D2 is extinguished, the first relay JDQ1 is not electrified, and its normally closed auxiliary contacts 1 and 2 are closed.

Further, because the thundercloud is far away from the wind generating set, the voltage induced by the lightning arrester on the surface of the fan blade and the top of the fan cabin is small, the first resistor R1 and the second resistor R2 form a voltage division loop, and the voltage at the two ends of the second resistor R2, namely the second induced voltage, is smaller than the starting voltage of the second optical coupler E2 due to the fact that the first induced voltage is small at the moment, and therefore the second optical coupler E2 stops working. At this time, a loop formed by the built-in direct-current power supply VCC, the ninth resistor R9, the third binding post and the fourth binding post of the second optocoupler E2, the third relay JDQ3, the tenth resistor R10 and the third light-emitting diode D3 is disconnected, the third light-emitting diode is extinguished, the third relay JDQ3 is not electrified, and normally-open auxiliary nodes 1 and 2 are disconnected. Because the voltage of the fourth binding post of the second optocoupler E2 is zero, the second triode stops working, and the loop formed by the internal dc power VCC, the eleventh resistor R11, and the second triode Q2 is disconnected. At this time, the second relay JDQ2 is charged, and the normally open auxiliary contacts 3 and 4 are closed, so that a loop formed by the built-in dc power supply VCC, the eleventh resistor R11, the normally open auxiliary contacts 3 and 4 of the second relay JDQ2, the twelfth resistor R12, and the fourth light emitting diode D4 is turned on, and the fourth light emitting diode D4 lights up and emits green light. Since the first relay JDQ1 is not energized, its normally closed auxiliary contacts 1, 2 are closed. The second relay JDQ2 is charged and its 2 normally open sets of auxiliary contacts 1, 2 and 3, 4 are all closed. The third relay JDQ3 is not electrified, and the normally-open auxiliary contacts 1 and 2 are disconnected, so that the laser lightning triggering starting circuit is switched on, and the laser lightning triggering device enters a heat engine state. And the laser lightning triggering transmitting circuit is disconnected, and the laser lightning triggering transmitting device is not started.

In a word, when thundercloud just appears in the area of the wind generating set, the first light-emitting diode D1 lights up and emits red light, the fourth light-emitting diode D4 lights up and emits green light, the laser lightning triggering device enters a heat engine state, and the laser lightning triggering and emitting device is not started.

(3) When thunderclouds are close to the area of the wind generating set and lightning strikes do not occur, larger induced voltage can occur on a lightning receptor on the surface of a fan blade and a lightning rod on the top of a fan cabin. The voltmeter in the lightning signal receiving loop shows the number. The two ends of the capacitor C have a large voltage, and a current passes through the first binding post and the second binding post of the first optical coupler E1, so that the first optical coupler E1 works normally, and the third resistor R3 plays a role in protecting the first optical coupler E1. At the moment, a loop formed by a built-in direct-current power supply VCC, a fourth resistor R4, a third binding post and a fourth binding post of a first optocoupler E1, a second relay JDQ2, a fifth resistor R5 and a first light-emitting diode D1 is conducted, the first light-emitting diode is lighted and emits red light, the second relay JDQ2 is electrified, and 2 groups of normally-open auxiliary nodes 1, 2, 3 and 4 are closed. Due to the fifth resistor R5, a voltage is present at the base b of the first transistor Q1, thereby turning on the first transistor Q1. The built-in direct current power supply VCC, the sixth resistor R6 and the first triode Q1 form a conductive loop, and as the first triode is conducted, no current passes through a loop formed by the first relay JDQ1, the seventh resistor R7 and the second light emitting diode D2, at the moment, the second light emitting diode D2 is extinguished, the first relay JDQ1 is not electrified, and normally closed auxiliary contacts 1 and 2 are closed.

Further, because the thundercloud is nearer apart from wind generating set, the voltage that the lightning rod induction was gone out at the arrester and the fan cabin top on fan blade surface is great, and first resistance R1 and second resistance R2 constitute the voltage divider circuit, because the second induced voltage is great and be greater than the starting voltage of second opto-coupler E2 this moment, therefore second opto-coupler E2 normally works. At the moment, a loop formed by a built-in direct-current power supply VCC, a ninth resistor R9, a third binding post and a fourth binding post of a second optocoupler E2, a third relay JDQ3, a tenth resistor R10 and a third light-emitting diode D3 is conducted, the third light-emitting diode is lightened, the third relay JDQ3 is electrified, and normally-open nodes 1 and 2 of the third relay JDQ3 are closed. Due to the tenth resistor R10, a voltage is present at the base b of the second transistor Q2, thereby turning on the second transistor Q2. The built-in direct current power supply VCC, the eleventh resistor R11 and the second triode Q2 form a conductive loop, and no current passes through a loop formed by the normally-open auxiliary contacts 3 and 4 of the second relay JDQ2, the twelfth resistor R12 and the fourth light emitting diode D4 due to the conduction of the second triode, so that the fourth light emitting diode D4 is turned off at the moment. Since the first relay JDQ1 is not energized, its normally closed auxiliary contacts 1, 2 are closed. The second relay JDQ2 is charged and its 2 normally open sets of auxiliary contacts 1, 2 and 3, 4 are all closed. The third relay JDQ3 is electrified, and the normally-open auxiliary contacts 1 and 2 are closed, so that the laser lightning strike starting circuit is conducted, and the laser lightning strike device enters a heat engine state. And the laser lightning triggering transmitting loop is conducted, and the laser lightning triggering transmitting device enters a transmitting state. Lightning in the thundercloud will reach the lightning rod area along the laser channel, then discharge the lightning to the ground through the discharge channel of wind generating set.

In a word, when thundercloud is close to the area of the wind generating set and no lightning stroke occurs, the first light emitting diode is lightened and emits red light, the third light emitting diode is lightened and emits red light, the laser lightning triggering starting device enters a heat engine state, and the laser lightning triggering emitting device enters an emitting state.

It can be understood that the preset value is a starting voltage of the optical coupler, and if the first sensing voltage is greater than or equal to the starting voltage of the first optical coupler E1, the laser lightning initiation control circuit controls the first light emitting diode D1 to be in a lighting state and the second light emitting diode D2 to be in a extinguishing state, and controls the laser lightning initiation control circuit to be in a conducting state. If the second induction voltage is greater than or equal to the starting voltage of the second optical coupler E2, the laser lightning triggering emission control loop controls the third light-emitting diode D3 to be in a lighting state and the fourth light-emitting diode D4 to be in a extinguishing state, and the laser lightning triggering emission control loop control the laser lightning triggering emission loop to be in a conducting state. Since the second induction voltage is the divided voltage of the first induction voltage, when the first induction voltage just reaches the preset value, the second induction voltage is smaller than the preset value, the laser lightning triggering starting loop is in a conducting state at the moment, and the laser lightning triggering transmitting loop is in a disconnecting state. And if the first induction voltage is greater than the preset value and the second induction voltage is also greater than the preset value, the laser lightning triggering starting circuit and the laser lightning triggering transmitting circuit are both in a conducting state.

After the thundercloud in the area where the wind generating set is located is discharged, the whole system is restored to the state when the area where the wind generating set is located is free of thunder, at the moment, the first relay JDQ1 is electrified, and normally closed contacts 1 and 2 of the first relay JDQ1 are disconnected. The second relay JDQ2 is not charged, and its 2 sets of normally open contacts 1, 2 and 3, 4 are all open. The third relay JDQ3 is not electrified, and the normally open contacts 1 and 2 are disconnected, so that the laser lightning initiating loop and the laser lightning transmitting loop are both disconnected. Only the second light emitting diode D2 in the laser lightning initiation control loop lights up and emits green light.

When wind generating set's laser induced lightning starting drive and laser induced lightning emitter carry out periodic inspection debugging, can make first normally open overhaul with switch GL1 closed start laser induced lightning starting drive and overhaul and debug it, also can make the second normally open overhaul with switch GL2 closed, start laser induced lightning emitter and overhaul and debug it etc. using two to normally open overhaul with the switch, can be more convenient examine the debugging.

In the laser lightning triggering control system provided in fig. 1, before lightning strikes a wind generating set, induced voltage generated by thundercloud on a lightning receptor and a lightning rod of the wind generating set is used as a starting signal, and a laser lightning triggering starting control loop and a laser lightning triggering emission control loop control starting and stopping of a laser lightning triggering starting device and a laser lightning triggering emission device, so that the lightning protection effect of a main transformer is achieved. By controlling the ratio of the first resistor R1 and the second resistor R2, the starting voltage of the laser ignition control loop can be adjusted. The two optical couplers are introduced to realize that photoelectric isolation is formed between the lightning signal receiving circuit and the laser lightning triggering start control circuit and between the lightning signal receiving circuit and the laser lightning triggering emission control circuit respectively, so that the influence of the lightning signals on the control circuits is avoided. The light emitting diodes with different functions and colors are introduced, and 3 working states can be visually displayed, namely: (1) the laser lightning triggering starting device and the laser lightning triggering emitting device are in a stop working state (at the moment, the second light emitting diode D2 is lightened and emits green light); (2) the laser lightning triggering starting device enters a heat engine state, and the laser lightning triggering transmitting device is not started (at the moment, the first light-emitting diode D1 and the fourth light-emitting diode D4 are lightened); (3) the laser lightning triggering device and the laser lightning triggering and emitting device both enter a working state (at the moment, the first light-emitting diode D1 and the third light-emitting diode D3 are both lighted). It can be understood that the three working states correspond to the change process of the distance between the thundercloud and the generator set, and accord with the actual scene.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.