1. Electric ship large capacity charging system's insulation detecting system, including energy storage converter and boats and ships battery cabinet, energy storage converter's direct current end is connected with boats and ships battery cabinet through its inside soft start bypass, set up bypass switch, its characterized in that on the soft start bypass: still including being located the switch board between energy storage converter and the boats and ships battery cabinet, the switch board carries out communication connection through communication cable and energy storage AC ware and boats and ships battery cabinet, the switch board includes insulating monitoring devices, insulating monitoring devices is connected through the output that detects cable and energy storage converter and the input of boats and ships battery cabinet, be provided with the contactor KM that detects the cable break-make between insulating detection device of control and energy storage converter in the switch board, be provided with the power that detects the cable break-make between control boats and ships battery and insulating detection device in the boats and ships battery cabinet and continueElectrical appliance JD_BatThe control cabinet acquires the ship battery voltage U of the ship battery cabinet according to the communication cable_BatControlling the energy storage converter to send out a voltage U_testThe control cabinet controls the contactor KM to be closed, and the insulation monitoring device is used for monitoring the insulation according to the voltage U_testAnd performing insulation detection and reporting a detection result to the energy storage converter, wherein if the insulation monitoring device passes the detection, the energy storage converter charges the ship battery through a bypass switch on a closed soft start bypass.

2. The insulation detection system of the electric ship high-capacity charging system according to claim 1, wherein: and a pre-charging resistor R is also connected to a detection cable between the insulation detection device and the energy storage AC device, and the pre-charging resistor R is connected with the contactor KM in parallel and then is connected into the detection cable.

3. The insulation detection system of the electric ship high-capacity charging system according to claim 2, wherein: after the insulation monitoring device detects that the insulation monitoring device passes the detection, the voltage U of the ship battery is obtained before the energy storage converter charges the ship battery_BatAnd charging the bus capacitor of the energy storage converter through the pre-charging resistor R.

4. An insulation detection system of a large-capacity charging system for an electric ship based on any one of claims 1 to 3, characterized in that: the method comprises the following steps:

step 1, power relay JD in ship battery cabinet_BatIn a disconnected state, connecting the detection cable to the ship battery cabinet;

step 2, the control cabinet detects the voltage U of the ship battery through the communication cable_BatThe control cabinet is based on the voltage U_BatSending an instruction to the energy storage converter, and outputting a voltage U by the energy storage transformer_test；

Step 3, judging the voltage U by the control cabinet_testAnd voltage U_BatWhether the difference in (b) is within a threshold range;

step 4, if the difference value in the step 3 is within the threshold range, controlling a contactor KM in the control cabinet to be closed, and carrying out insulation detection through an insulation detection device;

step 5, the insulation detection device judges an insulation detection result;

step 6, if the insulation detection in the step 5 is passed, the control cabinet controls the energy storage converter to stop, and the voltage U is passed_BatCharging a bus capacitor of the energy storage converter;

and 7, after delaying T2 time, controlling the energy storage converter to start up by the control cabinet, closing a soft start bypass and arranging a bypass switch, and charging the ship battery by the energy storage converter until the ship battery is fully charged.

5. The insulation detection system of the electric ship high-capacity charging system according to claim 4, wherein: the step 6 comprises the following steps:

step 61, the control cabinet controls the energy storage converter to stop and disconnects a contactor KM in the control cabinet;

step 62, the control cabinet sends a ship battery access instruction to the ship battery cabinet, and a power relay JD in the ship battery cabinet_BatClosing;

after the time T1 is delayed, the control cabinet controls the contactor KM in the control cabinet to be closed, and at the moment, the voltage U is applied_BatAnd charging the bus capacitor of the energy storage converter through the pre-charging resistor R.

6. The insulation detection system of the electric ship large-capacity charging system according to claim 5, wherein: the pre-charging resistor is connected to a detection cable between the insulation detection device and the energy storage AC device, and the pre-charging resistor R is connected with the contactor KM in parallel and then is connected into the detection cable.

7. The insulation detection system of the large-capacity charging system for the dynamic vessel according to claim 4, wherein: the threshold value is 15V, namely U_Bat-U_test＜15V。

8. The insulation detection system of the large-capacity charging system for the dynamic vessel according to claim 5, wherein: the time of the delay T1 is 3 seconds, and the time of the delay T2 is 5S.

9. The insulation detection system of the large-capacity charging system for the dynamic vessel according to claim 4, wherein: in the step 7, when a bypass switch is arranged on the closed soft start bypass and the energy storage converter charges the ship battery, the output voltage of the energy storage converter is equal to the voltage U of the ship battery to be tested_Bat。

10. The insulation detection system of the large-capacity charging system for the dynamic vessel according to claim 4, wherein: in the step 3, if the control cabinet judges that the difference value exceeds the threshold range, the charging is finished; in the step 5, if the insulation monitoring device judges that the monitoring result is abnormal, the charging is finished.

Background

The charging system of the large-capacity battery of the electric ship is used for charging the electric ship, and the battery capacity of the electric ship is large, so that only energy flows from a power grid to the battery in a one-way mode, and the charging system has the characteristic of an energy storage system. Simultaneously, because the mobility of boats and ships, charging plug must all be linked to the process of charging at every turn, consequently has some characteristics of car stake of charging again. Considering the influence of factors such as temperature difference, humidity and sunshine of the riparian environment, the insulation detection of the leading-out cable is very necessary in the safety design of the whole charging system. In order to complete insulation detection, a voltage of several hundred volts needs to be generated, and whether an external cable is reliably insulated or not is judged by measuring leakage current. In the existing charging system, this voltage can be generated by the energy storage converter, but the test voltage is maintained all the time, which affects the next charging operation. Therefore, how to perform quick insulation detection on the charging system of the ship while meeting the charging requirements of the electric ship for large voltage and current is a problem to be solved.

Disclosure of Invention

In order to overcome the defects, the invention aims to provide the insulation detection system of the large-capacity charging system of the mobile ship, the control cabinet is additionally arranged for carrying out logic control, the power control and the logic control are separated, and the research and development risk and the production cost of the whole system are reduced.

In order to achieve the above purposes, the invention adopts the technical scheme that: electric ship large capacity charging system's insulation detecting system, including energy storage converter and boats and ships battery cabinet, energy storage converter's direct current end is connected with boats and ships battery cabinet through its inside soft start bypass, set up bypass switch, its characterized in that on the soft start bypass: the ship energy storage system further comprises a control cabinet positioned between the energy storage converter and the ship battery cabinet, wherein the control cabinet is connected with the energy storage AC device and the ship through a communication cableThe boats and ships battery cabinet carries out communication connection, the switch board includes insulating monitoring devices, insulating monitoring devices is connected through the output that detects cable and energy storage converter and the input of boats and ships battery cabinet, be provided with the contactor KM that detects the cable break-make between insulating detection device of control and energy storage converter in the switch board, be provided with the power relay JD that detects the cable break-make between control boats and ships battery and insulating detection device in the boats and ships battery cabinet_BatThe control cabinet acquires the ship battery voltage U of the ship battery cabinet according to the communication cable_BatControlling the energy storage converter to send out a voltage U_testThe control cabinet controls the contactor KM to be closed, and the insulation monitoring device is used for monitoring the voltage U_testAnd performing insulation detection and reporting a detection result to the energy storage converter, wherein if the insulation monitoring device passes the detection, the energy storage converter charges the ship battery through a bypass switch on a closed soft start bypass.

A control cabinet is additionally arranged for logic control, power control and logic control are separated, and an energy storage converter is responsible for power control and outputs high-precision direct current; the control cabinet only makes on-off action to the current on the detection cable, and the control cabinet completes information interaction, logic judgment and instruction calculation with the ship battery and the energy storage converter through the detection cable and the communication cable. On the basis of not changing the operation logic of the energy storage converter, the voltage on the detection cable is detected through the insulation detection device, and the voltage output of the energy storage converter, the contactor KM and the power relay JD are controlled_BatThe system is switched on and off, so that the running reliability of the system is improved, and the system is compatible with ship batteries of different manufacturers and models.

Further, a pre-charging resistor R is connected to a detection cable between the insulation detection device and the energy storage ac device, and the pre-charging resistor R is connected to the detection cable after being connected in parallel with the contactor KM.

Further, after the insulation monitoring device passes the detection, the voltage U of the ship battery is obtained before the energy storage converter charges the ship battery_BatAnd charging the bus capacitor of the energy storage converter through the pre-charging resistor R.

The invention also provides an insulation detection method of the electric ship high-capacity charging system, and based on the insulation detection system of the electric ship high-capacity charging system, the control cabinet is added for carrying out logic control, the power control and the logic control are separated, and the research and development risk and the production cost of the whole system are reduced.

In order to achieve the above purposes, the invention adopts the technical scheme that: insulation detection system of electric ship large capacity charging system's insulation detection system, based on the insulation detection system's of above-mentioned electric ship large capacity charging system insulation detection system, its characterized in that: the method comprises the following steps:

step 1, power relay JD in ship battery cabinet_BatIn a disconnected state, connecting the detection cable to the ship battery cabinet;

step 2, the control cabinet detects the voltage U of the ship battery through the communication cable_BatThe control cabinet is based on the voltage U_BatSends out an instruction to the energy storage converter to output a voltage U of the energy storage transformer_test；

Step 3, judging the voltage U by the control cabinet_testAnd voltage U_BatWhether the difference in (b) is within a threshold range;

step 4, if the difference value in the step 3 is within the threshold range, controlling a contactor KM in the control cabinet to be closed, and carrying out insulation detection through an insulation detection device;

step 5, the insulation detection device judges an insulation detection result;

step 6, if the insulation detection in the step 5 is passed, the control cabinet controls the energy storage converter to stop, and the voltage U is passed_BatCharging a bus capacitor of the energy storage converter;

and 7, after delaying T2 time, controlling the energy storage converter to start up by the control cabinet, closing a soft start bypass and arranging a bypass switch, and charging the ship battery by the energy storage converter until the ship battery is fully charged.

Further, the step 6 includes the steps of:

step 61, the control cabinet controls the energy storage converter to stop and disconnects a contactor KM in the control cabinet;

step 62, the control cabinet sends the ship to the ship battery cabinetShip battery access instruction, and power relay JD in ship battery cabinet_BatClosing;

after the time T1 is delayed, the control cabinet controls the contactor KM in the control cabinet to be closed, and at the moment, the voltage U is applied_BatAnd charging the bus capacitor of the energy storage converter through the pre-charging resistor R.

Further, the pre-charging resistor is connected to a detection cable between the insulation detection device and the energy storage ac device, and the pre-charging resistor R is connected in parallel with the contactor KM and then connected to the detection cable.

Further, the threshold is 15V, U_Bat-U_test＜15V。

Further, the time of the delay T1 is 3 seconds, and the time of the delay T2 is 5S.

Further, in step 7, when the bypass switch is set on the closed soft start bypass and the energy storage converter charges the ship battery, the output voltage of the energy storage converter is equal to the voltage U of the ship battery to be measured_Bat。

Further, in the step 3, if the control cabinet determines that the difference value exceeds the threshold range, the charging is ended; in the step 5, if the insulation monitoring device judges that the monitoring result is abnormal, the charging is finished.

A control cabinet is additionally arranged for logic control, power control and logic control are separated, and an energy storage converter is responsible for power control and outputs high-precision direct current; the control cabinet only makes on-off action to the current on the detection cable. The control cabinet completes information interaction, logic judgment and instruction calculation with the ship battery and the energy storage converter through the detection cable and the communication cable. On the basis of not changing the operation logic of the energy storage converter, the control cabinet detects the voltage on the detection cable through the insulation detection device and controls the voltage output of the energy storage converter, the contactor KM and the power relay JD_BatThe system is switched on and off, so that the running reliability of the system is improved, and the system is compatible with ship batteries of different manufacturers and models.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a flow chart of an embodiment of the present invention;

FIG. 3 is a detailed flowchart of step 6 according to an embodiment of the present invention.

In the figure:

1. an energy storage converter; 2. a marine battery cabinet; 3. a control cabinet; 31. an insulation monitoring device; 32. a pre-charging resistor R; 4. a communication cable; 5. the cable is detected.

Detailed Description

The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.

Examples

Referring to the attached drawing 1, the insulation detection system of the large-capacity charging system of the electric ship comprises an energy storage converter 1 and a ship battery cabinet 2, wherein the direct-current end of the energy storage converter 1 is connected with the ship battery cabinet 2 through a soft start bypass in the energy storage converter, and a bypass switch is arranged on the soft start bypass.

The ship energy storage system further comprises a control cabinet 3 located between the energy storage converter 1 and the ship battery cabinet 2, and the control cabinet 3 is in communication connection with the energy storage AC device and the ship battery cabinet 2 through a communication cable 4. The control cabinet 3 comprises an insulation monitoring device 31, the insulation monitoring device 31 is connected with the output end of the energy storage converter 1 and the input end of the ship battery cabinet 2 through a detection cable 5, and a contactor KM for controlling the on-off of the detection cable 5 between the insulation monitoring device and the energy storage converter 1 is arranged in the control cabinet 3. A power relay JD for controlling the on-off of the detection cable 5 between the ship battery and the insulation detection device is arranged in the ship battery cabinet 2_Bat。

The control cabinet 3 controls the energy storage converter 1 to send out a voltage U according to the ship battery voltage UBat of the ship battery cabinet 2 collected by the communication cable 4_testThe control cabinet 3 controls the contactor KM to be closed and the insulation monitoring device 31 is used for monitoring the voltage U_testAnd performing insulation detection and reporting the detection result to the energy storage converter 1. If the insulation monitoring device 31 detects that the ship battery passes through, the energy storage converter 1 charges the ship battery through closing a bypass switch on the soft start bypass. And if the insulation monitoring is not passed, ending the charging.

And a pre-charging resistor R32 is also connected to the detection cable 5 between the insulation detection device and the energy storage AC device, and the pre-charging resistor R32 is connected with the contactor KM in parallel and then is connected to the detection cable 5. After the insulation monitoring device 31 detects that the voltage U of the ship battery is passed and before the energy storage converter 1 charges the ship battery_BatThe bus capacitor of the energy storage converter 1 is charged through the pre-charging resistor R32.

The control cabinet 3 also sends out a voltage U from the energy storage converter 1_testVoltage U of ship battery_BatIs compared with a threshold value set in the energy storage converter, the threshold value is 15V, namely, the voltage U sent by the energy storage converter 1 is ensured_testVoltage U of ship battery_BatWithin 15V. And a logic control module is arranged in the control cabinet 3 and used for comparing the difference value with a threshold value, sending a control instruction to the energy storage converter 1 and the ship battery cabinet 2 and controlling the contactor KM in the control cabinet.

A control cabinet 3 is additionally arranged for logic control, power control and logic control are separated, and an energy storage converter 1 is responsible for power control and outputs high-precision direct current; the control cabinet 3 only makes on-off action to the current on the detection cable 5, and the control cabinet 3 completes information interaction, logic judgment and instruction calculation with the ship battery and the energy storage converter 1 through the detection cable 5 and the communication cable 4. On the basis of not changing the operation logic of the energy storage converter 1, the voltage on the detection cable 5 is detected through the insulation detection device, and the voltage output of the energy storage converter 1, the contactor KM and the power relay JD are controlled_BatThe system is switched on and off, so that the running reliability of the system is improved, and the system is compatible with ship batteries of different manufacturers and models.

Referring to fig. 2-3, the insulation detection method of the electric ship high-capacity charging system of the present invention is based on the insulation detection system of the electric ship high-capacity charging system, and the control cabinet 3 is added for logic control, so that power control and logic control are separated, and research and development risks and production cost of the whole system are reduced.

The method comprises the following steps:

step 1, the power relay JDBat in the ship battery cabinet 2 is in an off state, and the detection cable 5 is connected to the ship battery cabinet 2.

Step 2, the control cabinet 3 detects the voltage U of the ship battery through the communication cable 4_BatThe control cabinet 3 sends an instruction to the energy storage converter 1 according to the voltage UBat, which is the output voltage U of the energy storage transformer_test；

Step 3, the control cabinet 3 judges the voltage U_testAnd voltage U_BatIs within a threshold range. The threshold value being 15V, i.e. U_Bat-U_test< 15V. And if the control cabinet 3 judges that the difference value exceeds the threshold range, finishing charging, otherwise, executing the step 4.

And 4, if the difference value in the step 3 is within the threshold range, controlling a contactor KM in the control cabinet 3 to be closed, and carrying out insulation detection through an insulation detection device.

And 5, judging an insulation detection result by the insulation detection device, and if the insulation detection device 31 judges that the monitoring result is abnormal, ending the charging. Otherwise, go to step 6.

Step 6, if the insulation detection in the step 5 is passed, the control cabinet 3 controls the energy storage converter 1 to stop, and the passing voltage U is passed_BatThe method for charging the bus capacitor of the energy storage converter 1 specifically comprises the following steps:

step 61, the control cabinet 3 controls the energy storage converter 1 to stop and disconnects a contactor KM in the control cabinet 3;

step 62, the control cabinet 3 sends a ship battery access instruction to the ship battery cabinet 2, and a power relay JD in the ship battery cabinet 2_BatClosing;

after the time T1 is delayed, the control cabinet 3 controls the contactor KM in the control cabinet to be closed, and the voltage U is applied_BatAnd charging the bus capacitor of the energy storage converter 1 through the pre-charging resistor R32, wherein the time of the time delay T1 is 3 seconds.

And 7, after delaying T2 time, controlling the energy storage converter 1 to start by the control cabinet 3, closing a soft start bypass and arranging a bypass switch, and charging the ship battery by the energy storage converter 1 until the ship battery is fully charged. Wherein the time of the delay T2 is 5S. When a bypass switch is arranged on the closed soft start bypass and the energy storage converter 1 charges the ship battery, the output voltage of the energy storage converter 1 is equal to the voltage U of the ship battery to be tested_Bat。

The pre-charging resistor is connected to the detection cable 5 between the insulation detection device and the energy storage AC device, and the pre-charging resistor R32 is connected with the contactor KM in parallel and then is connected to the detection cable 5.

A control cabinet 3 is additionally arranged for logic control, power control and logic control are separated, and an energy storage converter 1 is responsible for power control and outputs high-precision direct current; the control cabinet 3 only makes on-off action on the current on the detection cable 5. The control cabinet 3 completes information interaction, logic judgment and instruction calculation with the ship battery and the energy storage converter 1 through the detection cable 5 and the communication cable 4. On the basis of not changing the operation logic of the energy storage converter 1, the control cabinet 3 detects the voltage on the detection cable 5 through an insulation detection device and controls the voltage output of the energy storage converter 1, the contactor KM and the power relay JD_BatThe system is switched on and off, so that the running reliability of the system is improved, and the system is compatible with ship batteries of different manufacturers and models.

The above embodiments are merely illustrative of the technical concept and features of the present invention, and the present invention is not limited thereto, and any equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of the present invention.