CN217818304U - Fused salt battery coupling energy storage system - Google Patents
Fused salt battery coupling energy storage system Download PDFInfo
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- CN217818304U CN217818304U CN202221361697.1U CN202221361697U CN217818304U CN 217818304 U CN217818304 U CN 217818304U CN 202221361697 U CN202221361697 U CN 202221361697U CN 217818304 U CN217818304 U CN 217818304U
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Abstract
The utility model provides a fused salt battery coupling energy storage system, a serial communication port, including thermal power grid-connected plant with power supply unit, battery energy storage power supply unit and fused salt energy storage power consumption unit, wherein, thermal power grid-connected plant with power supply unit is including being incorporated into the power networks generating line, main change, high-pressure plant with generating line, high factory transformer, generator, wherein, the generator passes through the main change is connected to the generating line that is incorporated into the power networks, the battery energy storage high pressure side of battery energy storage power supply unit is incorporated into the power networks the switch connection 6kV of high factory transformer is with first branch, fused salt heating device of fused salt energy storage power consumption unit is incorporated into the power networks the switch connection 6kV of high factory transformer is with the second branch, the high-pressure plant is with the generating line connection the high pressure side of high factory transformer and the generator. Therefore, the fused salt energy storage and the storage battery energy storage are coupled, so that the power change can be quickly responded and the load instruction can be continuously responded in the AGC instruction response process of the unit.
Description
Technical Field
The utility model relates to a heat-retaining technical field, concretely relates to fused salt battery coupling energy storage system.
Background
In recent years, with the development of the energy storage industry, various novel energy storage technologies are broken through continuously, and demonstration applications are realized in more and more scenes, wherein the novel energy storage technologies mainly include a heat storage technology, a hydrogen energy storage technology, an electromagnetic energy storage technology, a flywheel energy storage technology and the like. The heat storage technology belongs to an energy type energy storage technology, has high energy density, low cost, long service life, various utilization modes and high comprehensive heat utilization efficiency, and can play a great role in the application fields of renewable energy consumption, clean heating and solar photo-thermal power station energy storage systems.
In the related art, a molten salt energy storage system is mostly adopted, although the energy density is high, the response power is slow, and the quick response of a unit load instruction cannot be realized.
SUMMERY OF THE UTILITY MODEL
The utility model provides a fused salt battery coupling energy storage system, a serial communication port, including thermal power grid-connected plant with power supply unit, battery energy storage power supply unit and fused salt energy storage power consumption unit, wherein, thermal power grid-connected plant with power supply unit is including being incorporated into the power networks generating line, main change, high-pressure plant with generating line, high factory transformer, generator, wherein, the generator passes through the main change is connected to the generating line that is incorporated into the power networks, the battery energy storage high pressure side of battery energy storage power supply unit is incorporated into the power networks the switch connection the first branch of 6kV factory electricity that high factory transformer was used, fused salt heating device that fused salt energy storage power consumption unit is incorporated into the power networks the switch connection the 6kV factory electricity second branch that high factory transformer was used, high pressure plant with the generating line connection the high pressure side that high factory transformer was used and the generator.
Optionally, the storage battery energy storage power supply unit further comprises an energy storage device, a storage battery energy storage low-voltage side grid-connected switch, a storage battery energy storage step-up transformer and a storage battery energy storage current conversion device, wherein,
the energy storage equipment is connected to the storage battery energy storage boosting transformer through the storage battery energy storage current conversion device and the storage battery energy storage low-voltage side grid-connected switch, and the storage battery energy storage boosting transformer is connected to the storage battery energy storage high-voltage side grid-connected switch.
Optionally, the molten salt energy storage power consumption unit further comprises a molten salt heating device for reducing pressure and changing and a molten salt heating device, wherein,
the low-voltage side of the voltage-reducing transformer of the molten salt heating device is connected with the molten salt heating device, and the high-voltage side of the voltage-reducing transformer of the molten salt heating device is connected with the second branch of 6kV station power of the high station transformer through the grid-connected switch of the molten salt heating device.
Optionally, the molten salt energy storage electricity utilization unit further comprises a high-temperature liquid molten salt water outlet valve and a liquid molten salt high-temperature tank, wherein,
the high-temperature liquid salt melting water outlet valve is connected with the salt melting electric heating device and the liquid salt melting high-temperature tank.
Optionally, the molten salt energy storage power unit further comprises a liquid molten salt low-temperature tank and a low-temperature liquid molten salt water inlet valve, wherein,
the low-temperature liquid molten salt inlet valve is connected with the molten salt electric heating device and the liquid molten salt low-temperature tank.
Optionally, the molten salt energy storage power unit further comprises a high-temperature liquid molten salt thermal driving device and a salt-water heat exchanger, wherein,
the high-temperature liquid molten salt heat driving device is connected with the salt-water heat exchanger and the liquid molten salt high-temperature tank.
Optionally, the salt-water heat exchanger is connected to the liquid molten salt cryogenic tank.
Optionally, the molten salt energy storage electricity unit further includes a deaerated water booster pump and a deaerated water inlet valve, wherein the deaerated water booster pump is connected to the deaerated water inlet valve and the salt-water heat exchanger.
Optionally, the molten salt energy storage electricity unit further comprises an air inlet valve of an off-plant gas facility and an off-plant gas facility, wherein,
and the air inlet valve of the plant external gas equipment is connected with the salt-water heat exchanger and the plant external gas equipment.
Optionally, the high plant becomes 20kV to 6.3kV high plant.
The utility model discloses there is following beneficial effect at least, because it is fast that battery energy storage has response power, but the characteristics that energy density is low, when response AGC frequency modulation, often can not respond continuous load instruction, the fused salt energy storage has energy density height, but the slow characteristics of response power, unable quick response unit load instruction carries out the coupling with fused salt energy storage and battery storage, can guarantee at response unit AGC instruction in-process, both can quick response power change, again can continuous response load instruction.
It should be understood that the statements in this section are not intended to identify key or critical features of the embodiments of the present disclosure, nor are they intended to limit the scope of the present disclosure. Other features of the present disclosure will become apparent from the following description.
Drawings
The drawings are included to provide a better understanding of the present solution and are not to be construed as limiting the present disclosure. Wherein:
fig. 1 shows a schematic structural diagram of a thermal power molten salt and storage battery hybrid energy storage system according to an embodiment of the disclosure.
Detailed Description
Exemplary embodiments of the present disclosure are described below with reference to the accompanying drawings, in which various details of embodiments of the present disclosure are included to assist understanding, and which are to be considered as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the present disclosure. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.
To facilitate an understanding of the present disclosure, the following first briefly explains the technical field to which the present disclosure relates.
FIG. 1 shows a schematic structural diagram of a thermal power molten salt and storage battery hybrid energy storage system according to an embodiment of the disclosure
As shown in fig. 1, the molten salt storage battery coupling energy storage system is characterized by comprising a power supply unit 1 for a thermal power grid-connected plant, a storage battery energy storage power supply unit 2 and a molten salt energy storage power unit 3, wherein the power supply unit for the thermal power grid-connected plant comprises a grid-connected bus 1-1, a main transformer 1-2, a high-voltage plant bus 1-3, a high-voltage plant transformer 1-4 and a generator 1-7, wherein the generator 1-7 is connected to the grid-connected bus 1-1 through the main transformer 1-2, a storage battery energy storage high-voltage side grid-connected switch 2-1 of the storage battery energy storage power supply unit is connected to a first branch 1-5 of 6kV plant power of the high-voltage plant transformer, a molten salt heating device grid-connected switch 3-1 of the molten salt energy storage power unit is connected to a second branch 1-6 of 6kV plant power of the high-plant transformer, and the high-voltage side of the high-voltage plant transformer and the generator are connected by the high-voltage plant power bus.
Optionally, the high factory is changed into 20kV to 6.3 kV.
Optionally, the storage battery energy storage power supply unit further comprises energy storage equipment 2-5, a storage battery energy storage low-voltage side grid-connected switch 2-3, a storage battery energy storage boosting transformer 2-2 and a storage battery energy storage converter device 2-4.
The energy storage equipment is connected to the storage battery energy storage boosting transformer through the storage battery energy storage current conversion device and the storage battery energy storage low-voltage side grid-connected switch, and the storage battery energy storage boosting transformer is connected to the storage battery energy storage high-voltage side grid-connected switch.
Optionally, the molten salt energy storage power unit further comprises a molten salt heating device voltage reduction transformer 3-2 and a molten salt heating device 3-3, wherein,
the low-voltage side of the molten salt heating device voltage reduction transformer 3-2 is connected with the molten salt heating device 3-3, and the high-voltage side of the molten salt heating device voltage reduction transformer 3-2 is connected with the second branch 1-6 of the 6kV station service power of the high station service transformer through the molten salt heating device grid-connected switch 3-1.
Optionally, the molten salt energy storage electricity utilization unit further comprises a high-temperature liquid molten salt water outlet valve and a liquid molten salt high-temperature tank, wherein,
the high-temperature liquid salt melting water outlet valve is connected with the salt melting electric heating device and the liquid salt melting high-temperature tank.
Optionally, the molten salt energy storage electricity unit further comprises a liquid molten salt low-temperature tank 3-4 and a low-temperature liquid molten salt water inlet valve 3-5, wherein,
the low-temperature liquid molten salt inlet valve 3-5 is connected with the molten salt electric heating device 3-3 and the liquid molten salt low-temperature tank 3-4.
Optionally, the molten salt energy storage electricity unit further comprises a high-temperature liquid molten salt thermal driving device and a salt-water heat exchanger, wherein,
the high-temperature liquid molten salt heat driving device 3-8 is connected with the salt-water heat exchanger 3-9 and the liquid molten salt high-temperature tank 3-7.
It should be noted that the thermal driving device in the molten salt energy storage power unit adopts a heating resistance wire and an automatic zero-crossing point judgment switch to control the temperature of the liquid molten salt high-temperature tank, and the related equipment has low cost and is more suitable for a thermal power molten salt heating system. The electric energy of the thermal driving device comes from station power, the power supply is stable, the electric charge is low, the fused salt can transfer heat energy to the deaerated water through the heat exchanger in the period of not responding to AGC frequency modulation, the deaerated water is supplied to external gas equipment of a plant, and the economical efficiency of the power plant is improved.
Optionally, the salt-water heat exchanger 3-9 is connected with the liquid molten salt low-temperature tank 3-4.
Optionally, the molten salt energy storage electric unit further comprises a deoxygenated water booster pump 3-10 and a deoxygenated water inlet valve 3-11, wherein the deoxygenated water booster pump 3-10 is connected with the deoxygenated water inlet valve 3-11 and the salt-water heat exchanger 3-9.
Optionally, the molten salt energy storage electricity utilization unit further comprises an air inlet valve 3-13 of an off-plant gas facility and an off-plant gas facility 3-14, wherein,
and the air inlet valve 3-13 of the off-plant gas equipment is connected with the salt-water heat exchanger 3-9 and the off-plant gas equipment 3-14.
Optionally, the high plant becomes 20kV to 6.3kV high plant.
It should be noted that the fused salt storage battery coupling energy storage is a novel coupling energy storage form of thermal storage and electric storage, the two energy storage forms mutually make up for the defects, the storage battery energy storage has the characteristics of high response power and low energy density, when AGC frequency modulation is responded, continuous load instructions cannot be responded, the fused salt energy storage has the characteristics of high energy density and low response power, the unit load instructions cannot be responded quickly, the fused salt energy storage and the storage battery storage are coupled, and it can be ensured that in the process of responding the unit AGC instructions, power change can be responded quickly, and the load instructions can be responded continuously.
Additionally, the utility model discloses well fused salt energy storage is with electric unit access station service power second branch, the battery inserts station service power first branch, respond unit AGC frequency modulation instruction jointly, wherein the high-power charge-discharge instruction of fused salt response, the operating mode to be continuous climbing or the load reduction instruction, battery response miniwatt charge-discharge instruction utilizes its quick charge-discharge characteristic, carry out the load response earlier, the battery shortens response time promptly and improves the response precision, the fused salt improves response rate, fused salt battery coupling energy storage improves thermal power unit AGC frequency modulation performance jointly.
It should be understood that various forms of the flows shown above may be used, with steps reordered, added, or deleted. For example, the steps described in the present disclosure may be executed in parallel, sequentially, or in different orders, as long as the desired results of the technical solutions disclosed in the present disclosure can be achieved, and the present disclosure is not limited herein.
The above detailed description should not be construed as limiting the scope of the disclosure. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made, depending on design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.
Claims (10)
1. A molten salt storage battery coupling energy storage system is characterized by comprising a power supply unit for a thermal power grid-connected plant, a storage battery energy storage power supply unit and a molten salt energy storage power unit, wherein,
the power supply unit for the thermal power grid-connected plant comprises a grid-connected bus, a main transformer, a high-voltage plant bus, a high-voltage plant transformer and a generator, wherein the generator is connected to the grid-connected bus through the main transformer,
the storage battery energy storage high pressure side of storage battery energy storage power supply unit is incorporated into the power networks the switch and is connected the first branch of 6kV station service that the high factory becomes, fused salt heating device grid-connected switch that fused salt energy storage was used electric unit connects the 6kV station service second branch that the high factory becomes, the high pressure station is connected with the generating line the high pressure side that the high factory becomes and the generator.
2. The system of claim 1, wherein the battery energy storage power supply unit further comprises an energy storage device, a battery energy storage low-voltage side grid-connected switch, a battery energy storage step-up transformer and a battery energy storage commutation device, wherein,
the energy storage equipment is connected to the storage battery energy storage boosting transformer through the storage battery energy storage commutation device and the storage battery energy storage low-voltage side grid-connected switch, and the storage battery energy storage boosting transformer is connected to the storage battery energy storage high-voltage side grid-connected switch.
3. The system of claim 1, wherein the molten salt energy storage power unit further comprises a molten salt heating device step-down transformer and a molten salt heating device, wherein,
the low-voltage side of the voltage-reducing transformer of the molten salt heating device is connected with the molten salt heating device, and the high-voltage side of the voltage-reducing transformer of the molten salt heating device is connected with the second branch of 6kV station power of the high station transformer through the grid-connected switch of the molten salt heating device.
4. The system of claim 1, wherein the molten salt energy storage electricity unit further comprises a high temperature liquid molten salt outlet valve and a liquid molten salt high temperature tank, wherein,
the high-temperature liquid salt melting water outlet valve is connected with the salt melting electric heating device and the liquid salt melting high-temperature tank.
5. The system of claim 1, wherein said molten salt energy storage power unit further comprises a cryogenic tank of liquid molten salt and a cryogenic liquid molten salt fill valve, wherein,
the low-temperature liquid molten salt water inlet valve is connected with the molten salt electric heating device and the liquid molten salt low-temperature tank.
6. The system of claim 1, wherein the molten salt energy storage electricity unit further comprises a high temperature liquid molten salt thermal drive and a salt-water heat exchanger, wherein,
the high-temperature liquid molten salt heat driving device is connected with the salt-water heat exchanger and the liquid molten salt high-temperature tank.
7. The system of claim 5 or 6, wherein the salt-water heat exchanger is connected to the liquid molten salt cryotank.
8. The system of claim 1, wherein the molten salt energy storage electric unit further comprises a deoxygenated water boost pump and a deoxygenated water inlet valve, wherein the deoxygenated water boost pump connects the deoxygenated water inlet valve and the salt-water heat exchanger.
9. The system of claim 1, wherein the molten salt energy storage electricity unit further comprises an off-plant gas facility air intake valve and an off-plant gas facility, wherein,
and the air inlet valve of the plant external gas equipment is connected with the salt-water heat exchanger and the plant external gas equipment.
10. The system of claim 1, wherein the high plant becomes 20kV to 6.3kV high plant.
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| CN202221361697.1U CN217818304U (en) | 2022-05-31 | 2022-05-31 | Fused salt battery coupling energy storage system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116014762A (en) * | 2023-03-27 | 2023-04-25 | 西安热工研究院有限公司 | Power-controllable fused salt load modularized frequency modulation system and method |
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2022
- 2022-05-31 CN CN202221361697.1U patent/CN217818304U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116014762A (en) * | 2023-03-27 | 2023-04-25 | 西安热工研究院有限公司 | Power-controllable fused salt load modularized frequency modulation system and method |
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