1. A pumped-storage power station based on underground tunnel groups, comprising:

an upper reservoir disposed on the ground;

the underground reservoir is arranged in an underground rock-soil layer below the upper reservoir, a water diversion channel and a water pumping channel are respectively arranged between the underground reservoir and the upper reservoir, one end of the water diversion channel is connected to the upper reservoir, and the other end of the water diversion channel is connected to the upper part of the underground reservoir; one end of the water pumping channel is connected to the upper reservoir, and the other end of the water pumping channel is connected to the bottom of the underground reservoir; the underground water storage reservoir is provided with a water pumping device, and the water pumping device is communicated with the water pumping channel.

2. The pumped-storage power station based on underground tunnel group of claim 1 wherein an electrically controlled sluice is provided in the catchment channel at an end adjacent to the upper reservoir.

3. The pumped-storage power station based on underground tunnel group of claim 1 wherein the upper reservoir comprises a first upper reservoir and a second upper reservoir, the diversion channel being connected to the first upper reservoir and the pumping channel being connected to the second upper reservoir.

4. The pumped-storage power station based on underground tunnel group of claim 3, characterized in that the pumping channel is provided with a pumping pipeline, one end of the pumping pipeline is connected with the pumping device, and the other end of the pumping pipeline extends upwards along the pumping channel and is communicated to the upper part of the second upper reservoir.

5. The pumped-storage power station based on underground tunnel groups of claim 4 wherein the pumping means is arranged at the bottom of the underground storage reservoir.

6. The pumped-hydro energy storage power station based on underground tunnel crowd of claim 5, characterized in that the pumping device is a high-lift submersible pump.

7. The pumped-hydro power storage plant based on underground tunnel crowd of claim 1, characterized in that the power generation means are water turbines.

8. The pumped-hydro power storage plant based on an underground tunnel group of claim 7, wherein the water turbine is disposed in the penstock at an end adjacent the underground storage reservoir.

9. The pumped-storage power station based on underground excavation clusters of claim 1, wherein structural stability members are disposed within both the catchment channel and the pumped-up channel.

10. The pumped-hydro power storage station based on underground tunnel group of claim 9 wherein a plurality of spacer layers are provided in the underground storage reservoir for reinforcing the structural strength of the underground storage reservoir.

Background

Nowadays, hydroelectric power stations are more and more common. The principle of the pumped storage is that water is pumped from a lower pool reservoir to an upper pool reservoir in the low-ebb period of power utilization, electric energy is converted into gravitational potential energy to be stored, and the water is released from the upper pool to the lower pool to generate power in the peak period of power utilization. The method has the advantages of large stored electric energy, long storage time, high response speed, low operation cost and the like, but the site selection is difficult because the method has serious dependence on the terrain.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a pumped storage power station based on an underground tunnel group, which can be arranged on the basis of digging tunnels downwards on the existing underground tunnel group or flat ground, so as to realize the effect of pumped storage.

The invention provides a pumped storage power station based on an underground tunnel group, which comprises:

an upper reservoir disposed on the ground;

the underground reservoir is arranged in an underground rock-soil layer below the upper reservoir, a water diversion channel and a water pumping channel are respectively arranged between the underground reservoir and the upper reservoir, one end of the water diversion channel is connected to the upper reservoir, and the other end of the water diversion channel is connected to the upper part of the underground reservoir; one end of the water pumping channel is connected to the upper reservoir, and the other end of the water pumping channel is connected to the bottom of the underground reservoir; the underground water storage reservoir is provided with a water pumping device, and the water pumping device is communicated with the water pumping channel.

The pumped storage power station based on the underground tunnel group provided by the embodiment of the invention at least has the following beneficial effects: an upper reservoir is arranged on the ground, an underground reservoir is arranged in a rock-soil layer below the upper reservoir, and a potential difference exists between the upper reservoir and the underground reservoir. A water diversion channel and a water pumping channel are respectively connected between the underground reservoir and the upper reservoir, water of the upper reservoir is input into the underground reservoir through the water diversion channel, and the water of the underground reservoir can be pumped to the upper reservoir through the water pumping channel. Pumping water in the underground reservoir to an upper reservoir in a power consumption valley period, namely converting electric energy into gravitational potential energy for storage; and in the peak period of power utilization, the water in the upper reservoir is input into the underground reservoir to generate power, namely, the gravitational potential energy is converted into electric energy, so that the electric energy is input into a power grid to be used. The pumped storage power station based on the underground tunnel group can be built on the flat ground, and the serious dependence of the hydropower station on the mountain terrain in the related technology is eliminated.

According to some embodiments of the invention, an electrically controlled sluice is provided in the catchment channel at an end adjacent the upper reservoir. The arrangement of the electric control sluice can control the water flow input from the upper reservoir to the underground reservoir according to the actual electricity utilization condition, and no waste is caused.

According to some embodiments of the invention, the upper reservoir includes a first upper reservoir and a second upper reservoir, the water drawing channel is connected to the first upper reservoir, and the water drawing channel is connected to the second upper reservoir. The water diversion channel and the water pumping channel are respectively communicated with the first upper reservoir and the second upper reservoir, so that the two processes of power generation and water pumping are separately managed, and the management is more convenient.

According to some embodiments of the invention, a water pumping pipeline is arranged in the water pumping channel, and one end of the water pumping pipeline is connected with the water pumping device, and the other end of the water pumping pipeline extends upwards along the water pumping channel and is communicated to the upper part of the second upper reservoir. The water pumping pipeline is communicated to the upper part of the second upper storage, so that the problem that water cannot be pumped due to water pressure when the water pumping channel is directly connected to the middle part or the bottom of the second upper storage is avoided.

According to some embodiments of the invention, the water pumping device is disposed at the bottom of the underground storage reservoir. The installation of the water pumping device at the bottom of the underground water reservoir makes it easier to pump water in the underground water reservoir to the upper reservoir.

According to some embodiments of the invention, the pumping device is a high-lift submersible pump.

According to some embodiments of the invention, the power generation device is a water turbine.

According to some embodiments of the invention, the water turbine is disposed in the penstock at an end adjacent to the underground storage reservoir. The turbine is arranged at this position so that it can receive the maximum gravitational potential energy and convert it into electrical energy for use.

According to some embodiments of the invention, structural stabilizing members are disposed within both the diversion channel and the pumping channel. Because diversion channel and pumping channel all set up underground, consequently set up the stable piece of structure in the passageway, strengthen the stability of passageway lateral wall.

According to some embodiments of the invention, a plurality of spacer layers are provided in the underground storage reservoir for reinforcing the structural strength of the underground storage reservoir. A plurality of spacing layers are arranged in the underground water storage reservoir, so that the effect of strengthening the structural strength of the underground water storage reservoir is achieved.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

Additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic diagram of a pumped-hydro power storage plant based on underground tunnel groups according to an embodiment of the present invention;

fig. 2 is a top view of an underground reservoir in a pumped-storage power station based on underground tunnel groups, according to an embodiment of the present invention.

The reference numbers are as follows: a first upper library 111; a second upper library 112; an underground reservoir 120; a spacer layer 121; a communication port 122; a catchment channel 130; an electrically controlled water gate 131; a water turbine 132; a water pumping passage 140; a water pumping pipe 141; a submersible pump 142.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, if there are first and second described only for the purpose of distinguishing technical features, it is not understood that relative importance is indicated or implied or that the number of indicated technical features or the precedence of the indicated technical features is implicitly indicated or implied.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

As shown in fig. 1, fig. 1 is a schematic diagram of a pumped-storage power station based on underground tunnel group according to an embodiment of the present invention. It can be understood that the invention provides a pumped storage power station based on underground tunnel group, comprising an upper reservoir and an underground storage reservoir 120, wherein the upper reservoir is arranged on the ground, and the underground storage reservoir 120 is arranged in an underground rock-soil layer below the upper reservoir. A diversion channel 130 and a water pumping channel 140 are respectively arranged between the underground reservoir 120 and the upper reservoir, one end of the diversion channel 130 is connected to the upper reservoir, and the other end is connected to the upper part of the underground reservoir 120; the water pumping passage 140 has one end connected to the upper reservoir and the other end connected to the bottom of the underground reservoir 120. The water diversion channel 130 is provided with a power generation device, the underground reservoir 120 is provided with a water pumping device, and the water pumping device is communicated with the water pumping channel 140. An upper reservoir is provided on the ground, an underground reservoir 120 is provided in a rock and soil layer below the upper reservoir, and a potential difference exists between the upper reservoir and the underground reservoir 120. A water diversion channel 130 and a water pumping channel 140 are respectively connected between the underground reservoir 120 and the upper reservoir, water of the upper reservoir is input into the underground reservoir 120 through the water diversion channel 130, and the water of the underground reservoir 120 can be pumped to the upper reservoir through the water pumping channel 140. Pumping water from the underground reservoir 120 to an upper reservoir during the electricity consumption valley period, i.e., converting electrical energy to gravitational potential energy for storage; during the peak period of power consumption, the water in the upper reservoir is input into the underground reservoir 120 for power generation, i.e., the gravitational potential energy is converted into electric energy, and then the electric energy is input into the power grid for use. The pumped storage power station based on the underground tunnel group can be built on the flat ground, and the serious dependence of the hydropower station on the mountain terrain in the related technology is eliminated.

It should be noted that the pumped storage power station based on the underground tunnel group provided in the present invention may be modified based on the existing underground mine group, and may also use a shield machine to excavate the underground storage reservoir 120, which is not limited in this respect.

It can be understood that the end of the diversion channel 130 close to the upper reservoir is provided with the electric control sluice 131, and the arrangement of the electric control sluice 131 can control the water flow rate of the upper reservoir input into the underground reservoir 120 for power generation according to the actual power demand, so that the waste of electric energy is not caused.

It should be noted that, in some embodiments, the upper reservoir includes a first upper reservoir 111 and a second upper reservoir 112, the water introduction channel 130 is connected to the first upper reservoir 111, and the water pumping channel 140 is connected to the second upper reservoir 112. The diversion channel 130 and the water pumping channel 140 are respectively communicated with the first upper reservoir 111 and the second upper reservoir 112, so that the two processes of power generation and water pumping are separately managed, and the management is more convenient.

Referring to fig. 1, it should be noted that a pumping channel 140 is further provided with a pumping pipeline 141. One end of the pumping pipe 141 is connected to the pumping device, and the other end extends upward along the pumping passage 140 and is connected to the upper side of the second upper reservoir 112. The pumping pipe 141 is connected to the upper side of the second upper reservoir 112, so that the problem that water cannot be pumped due to water pressure when the pumping channel 140 is directly connected to the middle or the bottom of the second upper reservoir 112 is avoided.

It will be appreciated that the water pumping device is disposed at the bottom of the underground storage tank 120. When the underground water storage reservoir 120 is built on the basis of the existing underground tunnel group, since the underground tunnel group may not be in a regular shape, the water pumping device is disposed at the bottom of the underground water storage reservoir 120, so that water can be pumped to the upper reservoir by using the water pumping device even when water is stored in the underground water storage reservoir 120. It should be noted that in some embodiments, a high-lift submersible pump 142 is used as the pumping device and a hydraulic turbine 132 is used as the power generation device.

It is understood that in some embodiments, the water turbine 132 is disposed in the penstock 130 near an end of the underground storage reservoir 120. Therefore, when the water in the upper reservoir passes through the penstock 130 to the water turbine 132, the water turbine 132 receives the maximum gravitational potential energy and converts it into electrical energy. The water turbine 132 is disposed at any position in the water diversion channel 130, and the effect of converting gravitational potential energy into electric energy can be achieved only by allowing the water turbine 132 to be impacted by water of the upper reservoir, which is not particularly limited by the present invention.

It should be noted that structural stability members are disposed in both the diversion channel 130 and the pumping channel 140. Because the diversion channel 130 and the pumping channel 140 are both arranged underground, structural stabilizing members are arranged in the channels to enhance the stability of the side walls of the channels. Specifically, in some embodiments, the structural strength of the catchment channel 130 and the pumping channel 140 is enhanced by providing steel structures embedded in the side walls in the catchment channel 130 and the pumping channel 140.

As shown in fig. 2, fig. 2 is a top view of an underground reservoir 120 in a pumped-hydro power storage station based on underground tunnel group according to an embodiment of the present invention. It is understood that a plurality of spacer layers 121 are provided in the underground water storage reservoir 120, and the spacer layers 121 serve to reinforce the structural strength of the underground water storage reservoir 120. The spacing layers 121 are used for storing water, and the plurality of spacing layers 121 are connected through the communication ports 122, so that water path communication is realized. The plurality of spacer layers 121 are respectively connected to the sidewalls of the underground water storage reservoir 120, enhancing the structural strength of the underground water storage reservoir 120.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.