Comprehensive energy storage power supply device and system

Abstract

The utility model discloses a comprehensive energy storage power supply device and system, relates to the field of energy storage, and aims to realize long-time electric energy storage, in the scheme, a heat storage device is formed by a hot tank, a cold tank, a molten salt pump, heating equipment, a high-temperature steam generation device and a power generation device, and a pumped storage water station is additionally arranged as another energy storage device. When extra electric energy exists in the power grid, the heat storage device can convert the electric energy into high-temperature fused salt in the heat tank, namely, the electric energy is converted into heat energy to be stored, and the heat energy of the high-temperature fused salt can be converted into the electric energy transmitted by the power generation device when needed and is sent back to the power grid. The pumped storage power station can convert the residual electric energy transmitted by the power grid into the potential energy of the water in the upper reservoir, convert the potential energy of the water into the corresponding electric energy when needed and send the corresponding electric energy back to the power grid, so that the residual electric energy in the power grid is successfully stored in a cross-seasonal mode, and power supply output is carried out when needed. The scheme also has the advantage of low investment cost.

Description

Technical Field

[0001] The utility model relates to the field of energy storage, and in particular to a comprehensive energy storage power supply device and system. Background Art

[0002] With the development of the times, the rational use of resources, especially the efficient use of electricity, is becoming increasingly important. In existing technologies, after receiving electricity transmitted by power generation facilities such as wind farms, photovoltaic power stations and batteries, the power grid will process it accordingly and transmit it to various power-consuming devices. However, in many cases, there will be surplus electricity. For this surplus electricity, how to store the excess electricity in the power grid across seasons and output it when needed is a problem that needs to be solved urgently. Utility Model Content

[0003] The purpose of the present utility model is to provide a comprehensive energy storage and power supply device and system. In order to achieve long-term electrical energy storage, this solution uses a hot tank, a cold tank, a molten salt pump, a heating device, a high-temperature steam generating device, and a power generation device to form a heat storage device, and an additional pumped storage water station is set up as another energy storage device, which successfully enables the excess electrical energy in the power grid to be stored across seasons and output when needed. In addition, this solution also has the advantage of low investment cost.

[0004] In order to solve the above technical problems, the utility model provides a comprehensive energy storage and power supply device, including: a hot tank, a cold tank, a molten salt pump, a heating device, a high-temperature steam generating device, a power generation device and a pumped storage power station;

[0005] The heating device is connected to the power grid, the heat tank and the molten salt pump respectively, and is used to heat the low-temperature molten salt transmitted by the molten salt pump after receiving the first electric energy transmitted by the power grid to generate corresponding high-temperature molten salt;

[0006] The molten salt pump is connected to the cold tank, and the control end is connected to the controller, and is configured to be turned on upon receiving a first control signal transmitted by the controller, and to transmit the low-temperature molten salt in the cold tank to the heating device; to be turned off upon receiving a second control signal transmitted by the controller, and to prohibit the low-temperature molten salt from being transmitted to the heating device; to be turned on upon receiving a third control signal transmitted by the controller, and to transmit the high-temperature molten salt in the hot tank to the high-temperature steam generating device; and to be turned off upon receiving a fourth control signal transmitted by the controller, and to prohibit the high-temperature molten salt from being transmitted to the high-temperature steam generating device;

[0007] The high-temperature steam generating device is connected to the molten salt pump, the cold tank and the power generation device respectively, and is used to generate high-temperature steam using the high-temperature molten salt transmitted by the molten salt pump, and transmit the cooled high-temperature molten salt to the cold tank, and transmit the high-temperature steam to the power generation device;

[0008] The power generation device is connected to the power grid, and is used to generate corresponding second electric energy using the high-temperature steam, and transmit the second electric energy to the power grid;

[0009] The pumped-storage power station is connected to the power grid and the controller respectively, and is configured to start and pump water from the lower reservoir of the pumped-storage power station to the upper reservoir of the pumped-storage power station when it receives the third electric energy transmitted by the power grid and the fifth control signal transmitted by the controller, and to release the water in the upper reservoir back to the lower reservoir and transmit the generated fourth electric energy to the power grid when it does not receive the third electric energy and receives the sixth control signal transmitted by the controller.

[0010] Optionally, the pumped storage power station comprises: the upper reservoir, the lower reservoir, a first generator, a pumping pump, a pressure pipe and a pressure valve;

[0011] The water pump is connected to the power grid, and is configured to be turned on when receiving the third electric energy transmitted by the power grid, and turned off when not receiving the third electric energy;

[0012] The pressure valve is provided on the pressure pipe, and a control end is connected to the controller, and is configured to open upon receiving the fifth control signal or the sixth control signal transmitted by the controller, and close upon receiving the seventh control signal transmitted by the controller;

[0013] The lower reservoir is connected to the upper reservoir via the pressure valve and the pressure pipe, and is used to pump water from the lower reservoir to the upper reservoir when the pumping pump is turned on and the pressure valve is turned on, prohibit pumping water from the lower reservoir to the upper reservoir when the pumping pump is turned off and / or the pressure valve is closed, and receive water released from the upper reservoir into the lower reservoir when the pumping pump is turned off and the pressure valve is opened;

[0014] The first generator is connected to the power grid, and is configured to generate the fourth electric energy when the water in the upper reservoir is released back into the lower reservoir, and transmit the fourth electric energy to the power grid.

[0015] Optionally, the power generation device includes: a high-pressure cylinder, a low-pressure cylinder and a second generator;

[0016] The high-pressure cylinder is connected to the high-temperature steam generating device and the low-pressure cylinder, respectively, and is configured to generate corresponding first mechanical energy using the high-temperature steam transmitted by the high-temperature steam generating device, transmit the first mechanical energy to the second generator through the low-pressure cylinder, and transmit first low-temperature steam corresponding to the high-temperature steam to the low-pressure cylinder, wherein the temperature of the first low-temperature steam is lower than that of the high-temperature steam;

[0017] The low-pressure cylinder is connected to the generator, and is used to generate corresponding second mechanical energy using the first low-temperature steam, and transmit the second mechanical energy to the second generator;

[0018] The second generator is connected to the power grid, and is configured to convert the first mechanical energy and the second mechanical energy into the second electrical energy, and transmit the second electrical energy to the power grid.

[0019] Optionally, the power generation device further includes:

[0020] an intermediate-pressure cylinder, wherein the intermediate-pressure cylinder is respectively connected to the high-pressure cylinder and the low-pressure cylinder, and is used to generate corresponding third mechanical energy using the first low-temperature steam, transmit the third mechanical energy to the second generator through the low-pressure cylinder, and transmit the second low-temperature steam corresponding to the first low-temperature steam to the low-pressure cylinder, wherein the temperature of the first low-temperature steam is greater than the temperature of the second low-temperature steam.

[0021] Optionally, the high-temperature steam generating device includes: a steam generator, a superheater and a feed water pump;

[0022] The steam generator is connected to the molten salt pump, the superheater and the feed water pump respectively, and is used to generate corresponding steam using the water transmitted by the feed water pump and the high-temperature molten salt transmitted by the molten salt pump;

[0023] The superheater is connected to the molten salt pump and the high-pressure cylinder respectively, and is used to use the high-temperature molten salt transmitted by the molten salt pump to heat the steam transmitted by the steam generator, and transmit the heated high-temperature steam to the high-pressure cylinder;

[0024] The control end of the water feed pump is connected to the controller, and is used to turn on when receiving the eighth control signal transmitted by the controller, and transmit water to the steam generator after turning on, and turn off when receiving the ninth control signal transmitted by the controller, and stop transmitting water to the steam generator.

[0025] Optionally, the high-temperature steam generating device further includes:

[0026] A reheater, wherein the reheater is respectively connected to the molten salt pump, the cold tank, the high-pressure cylinder and the low-pressure cylinder, and is used to use the high-temperature molten salt transmitted by the molten salt pump to heat the first low-temperature steam transmitted by the high-pressure cylinder, and transmit the heated first low-temperature steam to the low-pressure cylinder, and transmit the cooled high-temperature molten salt to the cold tank.

[0027] Optionally, the heating device is an electric heater, which is respectively connected to the power grid, the heat tank and the output end of the molten salt pump, and is used to heat the low-temperature molten salt transmitted by the molten salt pump after receiving the first electric energy transmitted by the power grid, and transmit the high-temperature molten salt formed after the low-temperature molten salt is heated to the hot tank.

[0028] Optionally, also include:

[0029] A temperature collecting device is connected to the superheater and the controller respectively, and is used to transmit the collected temperature of the high-temperature steam output by the superheater to the controller.

[0030] Optionally, also include:

[0031] A condenser is connected to the low-pressure cylinder and the water supply pump respectively, and is used to receive the cooled first low-temperature steam, convert the cooled first low-temperature steam into corresponding condensed water, and transmit the condensed water to the water supply pump.

[0032] In order to solve the above technical problems, the present invention also provides a comprehensive energy storage and power supply system, including: the comprehensive energy storage and power supply device as described above, the power grid, the wind farm, the photovoltaic power station, the battery, the inverter and the transformer, the wind farm, the photovoltaic power station and the battery are connected to the power grid in turn through the inverter and the transformer, and the power grid is connected to the comprehensive energy storage and power supply device.

[0033] The purpose of the present utility model is to provide a comprehensive energy storage and power supply device and system. In order to achieve long-term electric energy storage, the present solution constitutes a set of heat storage devices through a hot tank, a cold tank, a molten salt pump, a heating device, a high-temperature steam generating device, and a power generation device, and an additional pumped storage water station is set up as another set of energy storage devices. When there is extra electric energy in the power grid, the heat storage device can convert this part of the electric energy into high-temperature molten salt in the hot tank, that is, convert the electric energy into heat energy for storage. When needed, the heat energy of the high-temperature molten salt can be converted into electric energy transmitted by the power generation device and sent back to the power grid. Similarly, the pumped storage power station can convert the surplus electric energy transmitted by the power grid into the potential energy of the water in the upper reservoir, and convert the potential energy of the water into corresponding electric energy when needed to send it back to the power grid, thereby successfully storing the excess electric energy in the power grid across seasons and outputting power when needed. In addition, the present solution also has the advantage of low investment cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0035] Figure 1 A schematic structural diagram of a comprehensive energy storage and power supply device provided by the utility model;

[0036] Figure 2 This is a structural schematic diagram of a comprehensive energy storage and power supply system provided by the utility model. DETAILED DESCRIPTION

[0037] The core of this utility model is to provide a comprehensive energy storage and power supply device and system. In order to achieve long-term electrical energy storage, this solution uses a hot tank, a cold tank, a molten salt pump, a heating device, a high-temperature steam generation device, and a power generation device to form a heat storage device, and an additional pumped storage water station is set up as another energy storage device, successfully enabling the excess electricity in the power grid to be stored across seasons and output when needed. In addition, this solution also has the advantage of low investment cost.

[0038] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a comprehensive energy storage and power supply device provided by the present invention. The comprehensive energy storage and power supply device includes: a hot tank 1, a cold tank 2, a molten salt pump 3, a heating device 4, a high-temperature steam generating device 5, a power generation device 6, and a pumped storage power station 7;

[0040] The heating device 4 is connected to the power grid, the heat tank 1 and the molten salt pump 3 respectively, and is used to heat the low-temperature molten salt transmitted by the molten salt pump 3 after receiving the first electric energy transmitted by the power grid to generate corresponding high-temperature molten salt;

[0041] The molten salt pump 3 is connected to the cold tank 2, and the control end is connected to the controller. The pump is turned on when receiving a first control signal transmitted by the controller, and transmits the low-temperature molten salt in the cold tank 2 to the heating device 4. The pump is turned off when receiving a second control signal transmitted by the controller, prohibiting the transmission of the low-temperature molten salt to the heating device 4. The pump is turned on when receiving a third control signal transmitted by the controller, and transmits the high-temperature molten salt in the hot tank 1 to the high-temperature steam generating device 5. The pump is turned off when receiving a fourth control signal transmitted by the controller, prohibiting the transmission of the high-temperature molten salt to the high-temperature steam generating device 5.

[0042] The high-temperature steam generating device 5 is connected to the molten salt pump 3, the cold tank 2 and the power generation device 6 respectively, and is used to generate high-temperature steam using the high-temperature molten salt transmitted by the molten salt pump 3, and transmit the cooled high-temperature molten salt to the cold tank 2, and transmit the high-temperature steam to the power generation device 6;

[0043] The power generation device 6 is connected to the power grid, and is used to generate corresponding second electric energy using the high-temperature steam, and transmit the second electric energy to the power grid;

[0044] The pumped storage power station 7 is connected to the power grid and the controller respectively, and is used to start and pump water in the lower reservoir of the pumped storage power station 7 to the upper reservoir in the pumped storage power station 7 when it receives the third electric energy transmitted by the power grid and the fifth control signal transmitted by the controller, and when it does not receive the third electric energy and receives the sixth control signal transmitted by the controller, it returns the water in the upper reservoir to the lower reservoir and transmits the generated fourth electric energy to the power grid.

[0045] In the present invention, a comprehensive energy storage and power supply device is provided with a hot tank 1, a cold tank 2, a molten salt pump 3, a heating device 4, a high-temperature steam generating device 5, a power generation device 6 and a pumped storage power station 7. The hot tank 1, the cold tank 2, the molten salt pump 3, the heating device 4, the high-temperature steam generating device 5, and the power generation device 6 constitute a heat storage and power supply device, and the pumped storage power station 7 is a pumped storage power supply device. The two are combined to store excess electric energy in the power grid and convert the stored energy into electric energy for transmission to the power grid when the electric equipment on the grid side needs electric energy. When there is surplus electric energy in the power grid, the controller will transmit a first control signal to the molten salt pump 3 to control the molten salt pump 3 to turn on. Then the low-temperature molten salt in the cold tank 2 will be transmitted to the heating device 4 through the molten salt pump 3. The heating device 4 will turn on and off after receiving the electric energy transmitted by the power grid. The low-temperature molten salt is heated, and the heated high-temperature molten salt will be stored in the hot tank 1 to complete the storage of electrical energy into thermal energy. When the remaining electrical energy in the power grid is completely stored, the controller will transmit a second control signal to the molten salt pump 3 to shut down the molten salt pump 3, so that the low-temperature molten salt in the cold tank 2 will not enter the heating equipment 4. In addition, when the electrical equipment on the grid side needs electricity, the controller will transmit a third control signal to the molten salt pump 3 to turn on the molten salt pump 3 and transfer the high-temperature molten salt in the hot tank 1 to the high-temperature steam generating device 5. The high-temperature steam generating device 5 will use the high-temperature molten salt transmitted by the molten salt pump 3 to generate high-temperature steam, and transfer the cooled high-temperature molten salt to the cold tank 2, and transfer the high-temperature steam to the power generation device 6, so that the power generation device 6 converts the thermal energy in the high-temperature steam into corresponding electrical energy and transmits it to the power grid. Similarly, when the excess electric energy in the power grid is transmitted to the pumped-storage power station 7, and the pumped-storage power station 7 receives the fifth control signal transmitted by the controller, the pumped-storage power station 7 starts and pumps water from the lower reservoir into the upper reservoir, that is, converts the excess electric energy of the power grid into the potential energy of the water in the upper reservoir of the pumped-storage power station 7. When the pumped-storage power station 7 does not receive the third electric energy and receives the sixth control signal transmitted by the controller, it releases the water in the upper reservoir back into the lower reservoir, that is, converts the potential energy of the water in the upper reservoir into corresponding electric energy and transmits it back to the power grid, successfully storing the excess electric energy in the power grid across seasons and outputting power when needed. In addition, this solution also has the advantage of low investment cost.

[0046] It should be noted that the heat storage system (hot tank 1, cold tank 2, molten salt pump 3, heating equipment 4, high-temperature steam generator 5, and power generation device 6) converts excess electrical energy into thermal energy through an electric heater and stores it in the heat storage tank 1, generating electricity when needed. Leveraging the long-term performance of the heat storage system, it addresses seasonal uncertainties in wind and solar resources, ensuring stable power supply, enabling the integration of new energy sources and virtual peak-shaving for users within the power system. When energy storage is needed, the pumped-storage power station 7 uses excess power to operate pumps, pumping water from the lower reservoir to the upper reservoir. The excess power is stored as potential energy and then re-entered the upper reservoir. When discharge is required, the turbine generates electricity. This enables frequency and phase regulation within the power system, peak-load shifting, providing backup capacity and emergency backup (for emergencies, adapting to ultra-high voltage power consumption, and avoiding serious power outages), thereby improving the absorption capacity of clean energy.

[0047] It should also be noted that due to the installed capacity constraints of pumped-storage power station 7, this solution uses a molten salt thermal storage system with lower investment costs as a backup energy storage unit, thereby improving the technical and economic performance of the system. This model uses pumped-storage power station 7 as the primary energy storage unit and the thermal storage system as the backup energy storage unit.

[0048] It should also be noted that in this solution, the controller controls whether the molten salt pump 3 transmits the low-temperature molten salt in the cold tank 2 to the heating device 4 by sending a first control signal and a second control signal to the molten salt pump 3. That is, the controller can control the molten salt pump 3 to shut down when the power grid is still transmitting excess electric energy to the heating device 4, so as to stop the conversion process of excess electric energy in the power grid to the thermal energy of the high-temperature molten salt in the hot tank 1. Similarly, the controller controls whether the molten salt pump 3 transmits high-temperature molten salt to the high-temperature steam generating device 5 by sending a third control signal and a fourth control signal to the molten salt pump 3. That is, the controller can control the molten salt pump 3 to shut down when there is still high-temperature molten salt in the hot tank 1, so as to stop the high-temperature steam generating device 5 from continuing to generate high-temperature steam.

[0049] This embodiment provides a comprehensive energy storage and power supply device and system. In order to achieve long-term electric energy storage, this solution uses a hot tank 1, a cold tank 2, a molten salt pump 3, a heating device 4, a high-temperature steam generating device 5, and a power generation device 6 to form a heat storage device, and additionally sets up a pumped storage water station as another energy storage device. When there is extra electric energy in the power grid, the heat storage device can convert this part of the electric energy into high-temperature molten salt in the hot tank 1, that is, convert the electric energy into heat energy for storage. When needed, the heat energy of the high-temperature molten salt can be converted into electric energy transmitted by the power generation device 6 and sent back to the power grid. Similarly, the pumped storage power station 7 can convert the surplus electric energy transmitted by the power grid into the potential energy of the water in the upper reservoir, and when needed, convert the potential energy of the water into corresponding electric energy to send it back to the power grid, thereby successfully storing the excess electric energy in the power grid across seasons and outputting power when needed. In addition, this solution also has the advantage of low investment cost.

[0050] Based on the above embodiment:

[0051] As an optional embodiment, the pumped storage power station 7 includes: an upper reservoir, a lower reservoir, a first generator, a pumping pump, a pressure pipe and a pressure valve;

[0052] The water pump is connected to the power grid and is configured to be turned on when receiving the third electric energy transmitted by the power grid, and turned off when not receiving the third electric energy;

[0053] The pressure valve is provided on the pressure pipeline, and the control end is connected to the controller, and is configured to open upon receiving the fifth control signal or the sixth control signal transmitted by the controller, and close upon receiving the seventh control signal transmitted by the controller;

[0054] The lower reservoir is connected to the upper reservoir through a pressure valve and a pressure pipe, and is used to pump water from the lower reservoir to the upper reservoir when the pump is turned on and the pressure valve is open, prohibit pumping water from the lower reservoir to the upper reservoir when the pump is turned off and / or the pressure valve is closed, and receive water released from the upper reservoir into the lower reservoir when the pump is turned off and the pressure valve is open;

[0055] The first generator is connected to the grid, and is configured to generate fourth electrical energy when water in the upper reservoir is released back into the lower reservoir, and transmit the fourth electrical energy to the grid.

[0056] In the present invention, a pumped storage power station 7 is provided with an upper reservoir, a lower reservoir, a first generator, a pump, a pressure pipe, and a pressure valve. When there is excess power in the power grid, the pump receives this power and turns on. At the same time, the controller sends a fifth control signal to the pressure valve to open the pressure valve. When the pump and the pressure valve are simultaneously turned on, the pump pumps water from the lower reservoir through the pressure pipe to the upper reservoir. When the excess power in the power grid is exhausted, the pump shuts off, and the pressure valve receives a seventh control signal transmitted by the controller and closes, thereby converting electrical energy into potential energy and completing energy storage. Similarly, when power-consuming equipment on the power grid side needs electricity, the pump shuts off, and the pressure valve opens upon receiving a sixth control signal transmitted by the controller. At this time, water from the upper reservoir falls back into the lower reservoir through the pressure pipe, driving the impeller of the generator to rotate, generating electrical energy, accurately completing electrical energy storage and providing power output when needed.

[0057] It should be noted that in this solution, the controller controls whether the pressure valve is open by sending the fifth, sixth, and seventh control signals to the pressure valve. This means that the controller can control the pressure valve to close while the grid is still transmitting excess power to the pump, thereby stopping the conversion of excess power from the grid into potential energy in the water in the reservoir. Similarly, the controller can also control the duration of the pressure valve opening when the pump is off to control the intensity of the electrical energy converted from potential energy.

[0058] As an optional embodiment, the power generation device 6 includes: a high-pressure cylinder, a low-pressure cylinder and a second generator;

[0059] The high-pressure cylinder is connected to the high-temperature steam generating device 5 and the low-pressure cylinder respectively, and is used to generate corresponding first mechanical energy using the high-temperature steam transmitted by the high-temperature steam generating device 5, transmit the first mechanical energy to the second generator through the low-pressure cylinder, and transmit first low-temperature steam corresponding to the high-temperature steam to the low-pressure cylinder, where the temperature of the first low-temperature steam is lower than that of the high-temperature steam;

[0060] The low-pressure cylinder is connected to the generator and is used to generate corresponding second mechanical energy using the first low-temperature steam and transmit the second mechanical energy to the second generator;

[0061] The second generator is connected to the power grid and is configured to convert the first mechanical energy and the second mechanical energy into second electrical energy and transmit the second electrical energy to the power grid.

[0062] In the present utility model, the power generation device 6 is provided with a high-pressure cylinder, a low-pressure cylinder and a second generator, wherein the high-temperature steam transmitted by the high-temperature steam generating device 5 will drive the impeller in the high-pressure cylinder to rotate, and the high-pressure cylinder converts the thermal energy of the high-temperature steam into the first mechanical energy, and the high-temperature steam will generate the first low-temperature steam after passing through the high-pressure cylinder, and the first low-temperature steam will drive the impeller in the low-pressure cylinder to rotate to generate the second mechanical energy. The first mechanical energy and the second mechanical energy will drive the second generator to work, and the second generator will generate corresponding electrical energy to complete the conversion of thermal energy to electrical energy, and the converted electrical energy will be transmitted to the power grid, thereby ensuring the reliability of the solution.

[0063] As an optional embodiment, the power generation device 6 further includes:

[0064] The intermediate pressure cylinder is connected to the high pressure cylinder and the low pressure cylinder respectively, and is used to use the first low temperature steam to generate corresponding third mechanical energy, transmit the third mechanical energy to the second generator through the low pressure cylinder, and transmit the second low temperature steam corresponding to the first low temperature steam to the low pressure cylinder. The temperature of the first low temperature steam is greater than the temperature of the second low temperature steam.

[0065] In the present invention, a medium-pressure cylinder is also provided in the power generation device 6. After receiving the first low-temperature steam output by the high-pressure cylinder, the impeller therein will be driven by the first low-temperature steam to rotate, thereby generating a third mechanical energy. Compared with the case where there are only high-pressure cylinders and low-pressure cylinders, when a medium-pressure cylinder is added to the power generation device 6, the mechanical energy received by the second generator will be higher, and the output electrical energy will also be higher, thereby improving the power supply capacity of the power generation device 6.

[0066] It should be noted that there are a certain number of impellers inside the high-pressure cylinder (HP). When high-temperature and high-pressure steam passes through the impellers, they will cause the impellers to rotate, thereby generating mechanical energy; the function of the intermediate-pressure cylinder (IP) is similar to that of the high-pressure cylinder. The low-temperature and low-pressure steam output by the high-pressure cylinder will cause the impeller inside the intermediate-pressure cylinder to rotate, thereby generating mechanical energy, but the intermediate-pressure cylinder can further expand the low-temperature and low-pressure steam output by the high-pressure cylinder, thereby increasing the specific volume and temperature of the steam; the function of the low-pressure cylinder (LP) is the same as that of the intermediate-pressure cylinder. It can further expand the steam output by the intermediate-pressure cylinder, increase the specific volume and temperature of the steam, and generate the final mechanical energy.

[0067] As an optional embodiment, the high-temperature steam generating device 5 includes: a steam generator, a superheater and a feed water pump;

[0068] The steam generator is connected to the molten salt pump 3, the superheater and the feed water pump respectively, and is used to generate corresponding steam using the water transmitted by the feed water pump and the high-temperature molten salt transmitted by the molten salt pump 3;

[0069] The superheater is connected to the molten salt pump 3 and the high-pressure cylinder respectively, and is used to use the high-temperature molten salt transmitted by the molten salt pump 3 to heat the steam transmitted by the steam generator, and transmit the heated high-temperature steam to the high-pressure cylinder;

[0070] The control end of the water feed pump is connected to the controller, and is used to turn on when receiving the eighth control signal transmitted by the controller, and transmit water to the steam generator after turning on, and to turn off when receiving the ninth control signal transmitted by the controller, and stop transmitting water to the steam generator.

[0071] In the present utility model, the high-temperature steam generating device 5 is provided with a steam generator, a superheater and a water feed pump, wherein the water feed pump is turned on when it receives the eighth control signal transmitted by the controller, and transmits water to the steam generator after being turned on, and the steam generator will use the high-temperature molten salt transmitted by the molten salt pump 3 to convert the water into corresponding steam, and the superheater will use the high-temperature molten salt transmitted by the molten salt pump 3 to heat the steam transmitted by the steam generator, and transmit the heated high-temperature steam to the high-pressure cylinder, thereby improving the stability of the high-temperature steam generation process.

[0072] It should be noted that, in actual applications, the steam generator may not be connected to the hot tank 1, but may be connected to the superheater, and the high-temperature molten salt required by the steam generator may be transferred from the superheater to the steam generator. The specific process is as follows: Figure 2 shown.

[0073] As an optional embodiment, the high-temperature steam generating device 5 further includes:

[0074] The reheater is connected to the molten salt pump 3, the cold tank 2, the high-pressure cylinder and the low-pressure cylinder respectively. It is used to use the high-temperature molten salt transmitted by the molten salt pump 3 to heat the first low-temperature steam transmitted by the high-pressure cylinder, and transmit the heated first low-temperature steam to the low-pressure cylinder, and transmit the cooled high-temperature molten salt to the cold tank 2.

[0075] In the present utility model, a reheater is also provided in the high-temperature steam generating device 5. The function of the reheater is to use the high-temperature molten salt transmitted by the molten salt pump 3 to heat the first low-temperature steam transmitted by the high-pressure cylinder, and transmit the heated first low-temperature steam to the low-pressure cylinder, and transmit the cooled high-temperature molten salt to the cold tank 2. In order to increase the second mechanical energy output by the low-pressure cylinder, the reheater heats the first low-temperature steam transmitted by the high-pressure cylinder, thereby increasing the temperature of the first low-temperature steam, that is, by increasing the thermal energy corresponding to the first low-temperature steam, the second mechanical energy output by the low-pressure cylinder is increased, thereby increasing the electrical energy intensity output by the second generator, thereby improving the efficiency of the scheme.

[0076] As an optional embodiment, the heating device 4 is an electric heater, which is respectively connected to the power grid, the heat tank 1 and the output end of the molten salt pump 3, and is used to heat the low-temperature molten salt transmitted by the molten salt pump 3 after receiving the first electric energy transmitted by the power grid, and transmit the high-temperature molten salt formed after the low-temperature molten salt is heated to the heat tank 1.

[0077] In the present utility model, the heating device 4 is an electric heater. After receiving the first electric energy transmitted by the power grid, the electric heater will heat the low-temperature molten salt transmitted by the molten salt pump 3, and transmit the high-temperature molten salt formed after the low-temperature molten salt is heated to the hot tank 1. The advantages of the electric heater are high thermal efficiency and fast heating speed. It can quickly heat the low-temperature molten salt into high-temperature molten salt, thereby improving the efficiency of the solution.

[0078] As an optional embodiment, the method further includes:

[0079] The temperature collection device is connected to the superheater and the controller respectively, and is used to transmit the collected temperature of the high-temperature steam output by the superheater to the controller.

[0080] In the utility model, a temperature acquisition device is also provided in the comprehensive energy storage and power supply device. The temperature acquisition device can collect the temperature of the high-temperature steam output by the superheater and transmit the temperature of the high-temperature steam to the controller, so that the user can make corresponding adjustments according to the temperature of the high-temperature steam, thereby improving the efficiency of energy storage and power supply.

[0081] It should be noted that in actual applications, a display device and an alarm device can also be set up. The display device can be used to display the temperature of the high-temperature steam, so that the user can determine the temperature of the high-temperature steam in a timely manner. The alarm device can issue a corresponding alarm when the temperature of the collected high-temperature steam is lower than the temperature threshold, so that the user can add a reheater to the integrated energy storage and power supply device in a timely manner to ensure that the temperature of the high-temperature steam transmitted to the high-pressure pump is greater than the temperature threshold.

[0082] As an optional embodiment, the method further includes:

[0083] The condenser is connected to the low-pressure cylinder and the water feed pump respectively, and is used to receive the cooled first low-temperature steam, convert the cooled first low-temperature steam into corresponding condensed water, and transmit the condensed water to the water feed pump.

[0084] In the utility model, a condenser is also provided in the comprehensive energy storage and power supply device. The condenser can cool the cooled first low-temperature steam after receiving it, and convert the cooled first low-temperature steam into corresponding condensed water, and transmit the condensed water to the water feed pump. That is, the condenser and the water feed pump constitute a waste gas utilization system. By converting the first low-temperature steam into condensed water, water recycling is achieved, which plays a role in waste gas utilization, improves water utilization rate, and reduces water waste.

[0085] It should be noted that in actual applications, in addition to the condenser and the water pump that can form a simple waste gas utilization system, there are other devices that can also form a waste gas utilization system. This application does not specifically limit the waste gas utilization system. The specific structure of the waste gas utilization system is determined by actual needs.

[0086] Please refer to Figure 2 , Figure 2 This is a schematic diagram of the structure of a comprehensive energy storage and power supply system provided by the present invention. The comprehensive energy storage and power supply system includes: the comprehensive energy storage and power supply device described above, a power grid, a wind farm, a photovoltaic power station, a battery, an inverter, and a transformer. The wind farm, photovoltaic power station, and battery are sequentially connected to the power grid via the inverter and transformer, and the power grid is connected to the comprehensive energy storage and power supply device.

[0087] The integrated energy storage and power supply system provided in this embodiment corresponds to the above-mentioned integrated energy storage and power supply device, and therefore has the same beneficial effects as the above-mentioned integrated energy storage and power supply device. Therefore, for the embodiments of the integrated energy storage and power supply system, please refer to the description of the embodiments of the integrated energy storage and power supply device, which will not be repeated here.

[0088] It should be noted that the technical problem to be solved by this plan is cross-seasonal energy storage. This comprehensive energy storage and power supply system combines the uncertainty of resources across seasons, utilizes the complementary characteristics of wind and light (wind farms, photovoltaic power stations) and the regulation performance of pumped storage-heat storage hybrid energy storage, realizes efficient energy utilization and improves the economic performance of power supply.

[0089] It's also worth noting that the integrated energy storage power supply system primarily combines wind farms, photovoltaic power plants, and batteries. Wind farms utilize wind turbines as their primary equipment to convert wind energy into mechanical energy, which is then converted into electrical energy. Photovoltaic power plants utilize photovoltaic cells composed of semiconductor materials to directly convert solar energy into electrical energy. There are two types of energy storage: thermal storage systems (hot tank 1, cold tank 2, molten salt pump 3, heating equipment 4, high-temperature steam generator 5, and power generation equipment 6) and pumped storage power plants 7.

[0090] It should be noted that, in this specification, relational terms such as first and second, etc. are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0091] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A comprehensive energy storage and power supply device, characterized in that: include: Hot tanks, cold tanks, molten salt pumps, heating equipment, high-temperature steam generation equipment, power generation equipment and pumped storage power stations; The heating device is connected to the power grid, the heat tank and the molten salt pump respectively, and is used to heat the low-temperature molten salt transmitted by the molten salt pump after receiving the first electric energy transmitted by the power grid to generate corresponding high-temperature molten salt; The molten salt pump is connected to the cold tank, and the control end is connected to the controller, and is configured to be turned on upon receiving a first control signal transmitted by the controller, and to transmit the low-temperature molten salt in the cold tank to the heating device; to be turned off upon receiving a second control signal transmitted by the controller, and to prohibit the low-temperature molten salt from being transmitted to the heating device; to be turned on upon receiving a third control signal transmitted by the controller, and to transmit the high-temperature molten salt in the hot tank to the high-temperature steam generating device; and to be turned off upon receiving a fourth control signal transmitted by the controller, and to prohibit the high-temperature molten salt from being transmitted to the high-temperature steam generating device; The high-temperature steam generating device is connected to the molten salt pump, the cold tank and the power generation device respectively, and is used to generate high-temperature steam using the high-temperature molten salt transmitted by the molten salt pump, and transmit the cooled high-temperature molten salt to the cold tank, and transmit the high-temperature steam to the power generation device; The power generation device is connected to the power grid, and is used to generate corresponding second electric energy using the high-temperature steam, and transmit the second electric energy to the power grid; The pumped-storage power station is connected to the power grid and the controller respectively, and is configured to start and pump water from the lower reservoir of the pumped-storage power station to the upper reservoir of the pumped-storage power station when it receives the third electric energy transmitted by the power grid and the fifth control signal transmitted by the controller, and to release the water in the upper reservoir back to the lower reservoir and transmit the generated fourth electric energy to the power grid when it does not receive the third electric energy and receives the sixth control signal transmitted by the controller.

2. The integrated energy storage and power supply device according to claim 1, characterized in that: The pumped storage power station comprises: the upper reservoir, the lower reservoir, a first generator, a pumping pump, a pressure pipe and a pressure valve; The water pump is connected to the power grid, and is configured to be turned on when receiving the third electric energy transmitted by the power grid, and turned off when not receiving the third electric energy; The pressure valve is provided on the pressure pipe, and a control end is connected to the controller, and is configured to open upon receiving the fifth control signal or the sixth control signal transmitted by the controller, and close upon receiving the seventh control signal transmitted by the controller; The lower reservoir is connected to the upper reservoir via the pressure valve and the pressure pipe, and is used to pump water from the lower reservoir to the upper reservoir when the pumping pump is turned on and the pressure valve is turned on, prohibit pumping water from the lower reservoir to the upper reservoir when the pumping pump is turned off and / or the pressure valve is closed, and receive water released from the upper reservoir into the lower reservoir when the pumping pump is turned off and the pressure valve is opened; The first generator is connected to the power grid, and is configured to generate the fourth electric energy when the water in the upper reservoir is released back into the lower reservoir, and transmit the fourth electric energy to the power grid.

3. The integrated energy storage and power supply device according to claim 1, characterized in that: The power generation device includes: a high-pressure cylinder, a low-pressure cylinder and a second generator; The high-pressure cylinder is connected to the high-temperature steam generating device and the low-pressure cylinder, respectively, and is configured to generate corresponding first mechanical energy using the high-temperature steam transmitted by the high-temperature steam generating device, transmit the first mechanical energy to the second generator through the low-pressure cylinder, and transmit first low-temperature steam corresponding to the high-temperature steam to the low-pressure cylinder, wherein the temperature of the first low-temperature steam is lower than that of the high-temperature steam; The low-pressure cylinder is connected to the generator, and is used to generate corresponding second mechanical energy using the first low-temperature steam, and transmit the second mechanical energy to the second generator; The second generator is connected to the power grid, and is configured to convert the first mechanical energy and the second mechanical energy into the second electrical energy, and transmit the second electrical energy to the power grid.

4. The integrated energy storage and power supply device according to claim 3, characterized in that: The power generation device further includes: an intermediate-pressure cylinder, wherein the intermediate-pressure cylinder is respectively connected to the high-pressure cylinder and the low-pressure cylinder, and is used to generate corresponding third mechanical energy using the first low-temperature steam, transmit the third mechanical energy to the second generator through the low-pressure cylinder, and transmit the second low-temperature steam corresponding to the first low-temperature steam to the low-pressure cylinder, wherein the temperature of the first low-temperature steam is greater than the temperature of the second low-temperature steam.

5. The integrated energy storage and power supply device according to claim 3, characterized in that: The high-temperature steam generating device includes: a steam generator, a superheater and a feed water pump; The steam generator is connected to the molten salt pump, the superheater and the feed water pump respectively, and is used to generate corresponding steam using the water transmitted by the feed water pump and the high-temperature molten salt transmitted by the molten salt pump; The superheater is connected to the molten salt pump and the high-pressure cylinder respectively, and is used to use the high-temperature molten salt transmitted by the molten salt pump to heat the steam transmitted by the steam generator, and transmit the heated high-temperature steam to the high-pressure cylinder; The control end of the water feed pump is connected to the controller, and is used to turn on when receiving the eighth control signal transmitted by the controller, and transmit water to the steam generator after turning on, and turn off when receiving the ninth control signal transmitted by the controller, and stop transmitting water to the steam generator.

6. The integrated energy storage and power supply device according to claim 5, characterized in that: The high-temperature steam generating device further includes: A reheater, wherein the reheater is respectively connected to the molten salt pump, the cold tank, the high-pressure cylinder and the low-pressure cylinder, and is used to use the high-temperature molten salt transmitted by the molten salt pump to heat the first low-temperature steam transmitted by the high-pressure cylinder, and transmit the heated first low-temperature steam to the low-pressure cylinder, and transmit the cooled high-temperature molten salt to the cold tank.

7. The integrated energy storage and power supply device according to claim 1, characterized in that: The heating device is an electric heater, which is respectively connected to the power grid, the heat tank and the output end of the molten salt pump, and is used to heat the low-temperature molten salt transmitted by the molten salt pump after receiving the first electric energy transmitted by the power grid, and transmit the high-temperature molten salt formed after the low-temperature molten salt is heated to the hot tank.

8. The integrated energy storage and power supply device according to claim 5, characterized in that: Also includes: A temperature collecting device is connected to the superheater and the controller respectively, and is used to transmit the collected temperature of the high-temperature steam output by the superheater to the controller.

9. The integrated energy storage and power supply device according to claim 5 or 6, characterized in that: Also includes: A condenser is connected to the low-pressure cylinder and the water supply pump respectively, and is used to receive the cooled first low-temperature steam, convert the cooled first low-temperature steam into corresponding condensed water, and transmit the condensed water to the water supply pump.

10. A comprehensive energy storage and power supply system, characterized in that: include: The integrated energy storage and power supply device, power grid, wind farm, photovoltaic power station, battery, inverter, and transformer according to any one of claims 1 to 9, wherein the wind farm, the photovoltaic power station, and the battery are sequentially connected to the power grid through the inverter and the transformer, and the power grid is connected to the integrated energy storage and power supply device.

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