CN115653712A - Thermoelectric unit energy storage peak regulation system and method - Google Patents
Thermoelectric unit energy storage peak regulation system and method Download PDFInfo
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Abstract
The application discloses thermoelectric unit energy storage peak shaving system and method, wherein, thermoelectric unit peak shaving energy storage system specifically includes: peak regulation control module and energy storage module, peak regulation control module passes through first valve control module control connection with energy storage module, and with electric wire netting scheduling module and thermoelectric unit control module communication connection, a peak regulation demand for acquireing thermoelectric unit, according to the peak regulation demand energy storage or the ability of releasing of energy storage module is realized through the first heat transfer device of the on-off control energy storage module of the first valve control module of control a plurality of and second heat transfer device's of switch control, the realization is in thermoelectric unit peak regulation period, both satisfied user's hot steam volume demand, can guarantee thermoelectric unit steady operation again, peak regulation ability has been improved, user's unit peak regulation operation flexibility has been strengthened.
Description
Technical Field
The application relates to the technical field of lava energy storage, in particular to a thermoelectric unit energy storage peak shaving system and method.
Background
Under carbon peak reaching, carbon neutralization and background, the rapid increase of new forms of energy makes traditional thermal power generating unit load factor reduce, and traditional thermal power generating unit accounts for the ratio and reduces gradually, and most units operate at non-full load state for a long time, and a small number shut down even, cause the waste of having put into production the resource, and electric wire netting power generation end and load end volatility present the increase situation, and the electric wire netting demand of adjusting the peak is further outstanding, has proposed higher requirement to thermal power generating unit flexibility peak regulation ability. The steam supply amount of the thermoelectric generator set for industrial users fluctuates along with the real-time production change of enterprises, most of heat users produce steam in the daytime, the steam demand is large, the heat users produce little steam or stop producing at night, and the steam demand is little or does not have heat demand. When the thermoelectric unit operates in a peak regulation period, the peak regulation demand and the heat supply demand are contradictory due to the large increase and decrease of the steam extraction heat supply amount.
Consequently, under the prerequisite of participating in the peak shaving in whole net thermal power generating unit, need for urgent need a thermoelectric unit energy storage peak shaving system can guarantee the balance of peak shaving demand and heat supply demand including the energy storage module of peak shaving control module, promote thermoelectric unit flexibility peak shaving simultaneously.
Disclosure of Invention
Based on prior art's defect, this application provides a thermoelectric generator group energy storage peak shaving system, specifically includes:
the peak regulation control module is in control connection with the energy storage module, is in communication connection with the power grid dispatching module and the thermoelectric unit control module, and is used for acquiring peak regulation requirements and controlling the energy storage or energy discharge of the energy storage module by controlling the opening and closing of the first valve control module and/or the second valve control module according to the peak regulation requirements.
The peak regulation control module comprises: the boiler, the steam turbine, generator and auxiliary assembly, the steam turbine includes the high pressure jar that links to each other in proper order through the pipeline, intermediate pressure jar and low pressure jar, auxiliary assembly includes the condenser, low pressure feed water heater group, the oxygen-eliminating device, high pressure feed water heater group, the condenser, low pressure heater, the pipeline of oxygen-eliminating device communicates in proper order, the delivery port of oxygen-eliminating device is divided into two the tunnel, communicate with high pressure heater all the way, the heat absorption side entry intercommunication of first valve control module and second heat transfer device is crossed to another road, the export of high pressure feed water heater group, the steam extraction export of high pressure jar all passes through the tube coupling with the entry of boiler, the steam outlet of boiler includes two the tunnel, respectively with the high pressure jar, the intermediate pressure jar passes through the tube coupling.
The energy storage module includes: the system comprises a first heat exchange device, a second heat exchange device, a cold salt tank, a hot salt tank, a cold salt pump and a hot salt pump, wherein a heat release side inlet of the first heat exchange device is connected with a steam extraction pipeline of reheated steam;
the fused salt input end of the second heat exchange device is connected with the output end of the hot salt pump through a pipeline, and the fused salt output end of the second heat exchange device is connected with the input end of the cold salt tank.
Preferably, the steam output from the heat absorption side outlet of the second heat exchange device is divided into two paths by the second valve control module, one path is merged into the heat supply pipe network, and the other path enters the high-pressure water supply heater group, the deaerator and the low-pressure water supply heater group through the first steam pipeline, the second steam pipeline and the third steam pipeline respectively.
Preferably, the steam outlet of the high-pressure cylinder, the steam outlet of the intermediate-pressure cylinder and the steam outlet of the low-pressure cylinder are respectively connected with the steam input end of the high-pressure feed water heater group, the steam input end of the deaerator and the steam input end of the low-pressure feed water heater group through a third valve control module, a fourth valve control module and a fifth valve control module.
Preferably, the second valve control module is a three-way valve.
Preferably, a water feeding pump is arranged on a pipeline connecting a condensed water output end of the deaerator and a condensed water input end of the high-pressure water feeding heater group.
Preferably, the condensed water output end of the condenser is connected with the condensed water pump input end, and the condensed water pump output end is connected with the condensed water input end pipeline of the low-pressure feed water heater group through the sixth valve control module.
The second aspect of the present application provides a thermoelectric unit energy storage peak shaving method, which is applied to the thermoelectric unit energy storage system, and specifically includes:
under the condition that the thermoelectric unit has no peak regulation requirement, the reheated steam exchanges heat with the low-temperature molten salt through the heat release side inlet of the first heat exchange device to generate low-temperature steam and high-temperature molten salt,
the low-temperature steam is subjected to temperature and pressure regulation and then is supplied to a heat pipe network, and the low-temperature molten salt is subjected to heat exchange by the first heat exchange device and then is generated into high-temperature molten salt through the heat release side outlet to be stored in the hot salt tank, so that the energy storage of the energy storage module is realized.
Under the condition that the thermoelectric unit has a downward or upward peak regulation demand, the peak regulation control module controls the energy storage module to discharge energy.
Under the condition that the thermoelectric unit has a downward peak shaving requirement, reducing the load of the boiler; under the condition that the maximum heat release quantity of the heat release side output end of the first heat exchange device can not satisfy the demand of a heat user, the switch of the first valve control module is opened, the condensed water of the deaerator is output to the heat absorption side input end of the second heat exchange device, the switch of the second valve control module is opened, the heat exchange of high-temperature fused salt and the condensed water is realized, low-temperature fused salt and high-temperature steam are generated, the low-temperature fused salt flows back to the cold salt tank, the high-temperature steam is merged into the heat supply pipe network for external heat supply, and the peak regulation demand downward is satisfied.
Under the condition that the thermoelectric unit has an upward peak shaving requirement, operating the boiler at full load;
under the condition that the output of thermoelectric unit can not satisfy the ascending peak regulation demand of thermoelectric unit, close third valve control module, fourth valve control module, the switch of fifth valve control module, open the switch of first valve control module and second valve control module, realize high temperature fused salt and comdenstion water heat transfer, produce low temperature fused salt and high temperature steam, low temperature fused salt flows back to in the cold salt jar, high temperature steam passes through first steam conduit respectively after the pressure regulating that adjusts the temperature, the second steam conduit, the third steam conduit gets into high pressure feed water heater group, the oxygen-eliminating device, in the low pressure feed water heater group, be arranged in satisfying ascending peak regulation demand.
Through the technical scheme that this application provided, make it compare with prior art and have following advantage and positive effect at least:
this application carries out the energy storage or releases through peak regulation control module control energy storage module, realizes having under the condition of peak regulation demand in the thermoelectric unit, according to the energy of energy storage module storage for make the thermoelectric unit in the peak regulation period, release through storage system can realize reaching the heat consumer steam volume demand, can satisfy the peak regulation demand again, improved unit peak regulation ability simultaneously, strengthened unit peak regulation operation flexibility, improve equipment utilization rate.
Drawings
FIG. 1 shows a schematic diagram of a thermoelectric power unit energy storage peak shaving system;
FIG. 2 shows a diagram of a thermoelectric power generation unit energy storage peak shaving device;
the correspondence between each mark and the part name is as follows:
1. a boiler; 2. a high pressure cylinder; 3. an intermediate pressure cylinder; 4. a low pressure cylinder; 5. a generator; 6. a condenser; 7. a low pressure feedwater heater group; 8. a deaerator; 9. a high pressure feed water heater group; 10. a sixth valve control module; 11 a third valve control module; 12. a fourth valve control module; 13. a fifth valve control module; 14. a first heat exchange means; 15. a hot salt tank; 16. a cold salt tank; 17. a hot salt pump; 18. a cold salt pump; 19. a second heat exchange means; 20. a second valve control module; 21. reheating the steam; 22. supplying steam to the outside; 23. a first valve control module; 24. a heat supply pipe network.
Detailed Description
Other features, objects and advantages of the present invention will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, with reference to the accompanying drawings.
Example 1:
as shown in fig. 1, a schematic diagram of a thermoelectric power generation unit energy storage peak shaving system is shown, which includes: a peak shaving control module 100 and an energy storage module 200;
the peak regulation control module 100 is in control connection with the energy storage module 200, and is in communication connection with the power grid dispatching module 300 and the thermoelectric unit control module 400, and is configured to obtain a peak regulation demand, and control the energy storage or discharge of the energy storage module by controlling the on/off of the first valve control module and/or the second valve control module according to the peak regulation demand.
Example 2:
as shown in fig. 2, a diagram of a thermoelectric power generation unit energy storage peak shaving device is shown, which specifically includes:
the peak shaver control module 100 includes: the boiler, the steam turbine, generator 5 and auxiliary assembly, the steam turbine includes the high pressure jar 2 that links to each other in proper order through the pipeline, intermediate pressure jar 3 and low pressure jar 4, auxiliary assembly includes condenser 6, low pressure feed water heater group 7, oxygen-eliminating device 8, high pressure feed water heater group 9, condenser 6, low pressure heater 7, the pipeline of oxygen-eliminating device 8 communicates in proper order, the delivery port of oxygen-eliminating device divide into two the tunnel, communicate with high pressure heater 9 all the way, another way passes through the heat absorption side entry intercommunication of first valve control module 23 with second heat transfer device 19, the steam outlet of high pressure feed water heater group 9, the steam outlet of high pressure jar all passes through the tube coupling with the entry of boiler, the steam outlet of boiler includes two the tunnel, respectively with high pressure jar 1, intermediate pressure jar 2 passes through the pipeline intercommunication.
In an embodiment of the application, an inlet of the low pressure cylinder receives a part of steam at a steam exhaust port of the intermediate pressure cylinder, the steam exhausted through the steam exhaust port of the low pressure cylinder is output to the low pressure feed water heater group 7 through a fifth valve control module, the other part of the steam output by the low pressure cylinder is condensed water, the condensed water output is connected with an input end of a condensed water pump through an output end of the condenser 6, and an output end of the condensed water pump is connected with a condensed water input end of the low temperature low pressure feed water heater group 7 through a sixth valve control module 10, and is used for receiving the condensed water output by the condensed water pump under the condition that the sixth valve control module 10 is opened.
In one embodiment of the application, the thermoelectric unit may be a steam extraction and heat supply unit that generates and supplies electricity simultaneously.
The energy storage module 200 includes: the system comprises a first heat exchange device 14, a second heat exchange device 19, a hot salt tank 15, a cold salt tank 16, a hot salt pump 17 and a cold salt pump 18, wherein the cold salt tank 16 is used for storing low-temperature molten salt, and the hot salt tank 17 is used for storing high-temperature molten salt; steam input from the heat release side input end of the first heat exchange device 14 is reheat steam in the thermoelectric unit, and is connected through a steam extraction pipeline 21 of the reheat steam, and the molten salt input end of the first heat exchange device 14 is connected with the output end of the cold salt pump 18; the output end of the heat release side of the first heat exchange device 14 is connected with a heat supply pipe network 24 of the thermoelectric generator set and used for supplying heat; the fused salt output end of the first heat exchange device 14 is connected with the input end of the hot salt tank 15; the heat absorption side input end of the second heat exchange device 19 is connected with the condensate water output end of the deaerator 8 in the thermoelectric unit through the first valve control module 23, the condensate water is input into the deaerator 8, the steam output by the heat absorption side outlet of the second heat exchange device 19 is divided into two paths through the second valve control module 20, one path of the steam is merged into a heat supply pipe network, and the other path of the steam enters the high-pressure water supply heater group, the deaerator and the low-pressure water supply heater group through the first steam pipeline, the second steam pipeline and the third steam pipeline respectively.
In an embodiment of the application, the output end of the heat absorption side of the second heat exchange device 19 is connected to the first steam pipeline, the second steam pipeline, the third steam pipeline and the heat supply pipe network 24 connected to the heat supply unit through the second valve control module 20.
Specifically, the first steam pipeline, the second steam pipeline and the third steam pipeline are respectively input into the high-pressure water supply heater group 9, the deaerator 8 and the low-pressure water supply heater group 7 through the air extraction pipelines of the thermoelectric motors.
In one embodiment of the application, the first heat exchange device 14 can be a steam-molten salt heat exchange device and the second heat exchange device 19 can be a molten salt-steam heat exchange device.
In an embodiment of the application, the second valve control module 20 may be a three-way valve, an input end of the three-way valve is connected to communicate with an inlet of a heat absorption side of the second heat exchange device, an output end of the three-way valve outputs steam, one way of the steam is merged into the heat supply pipe network 24 of the thermoelectric unit, and the other one of the steam is input into the high-pressure water supply heater group 9, the deaerator 8 and the low-pressure water supply heater group 7 through the first steam pipeline, the second steam pipeline and the third steam pipe which are connected to the heat supply unit respectively.
In an embodiment of the application, the first valve control modules arranged at the output end of the energy storage module 100 are valves with a corresponding number, and when the energy storage system needs to store energy or the thermoelectric generator set has a peak shaving requirement, the energy storage and the energy discharge of the energy storage module 100 are controlled by controlling the switches of the corresponding first valve control modules, and a working process of peak shaving control realized according to the peak shaving requirement will be described in detail below.
In an embodiment of the application, the low-temperature steam may enter the heat supply pipe network 24 through a temperature and pressure adjusting mode, and the like, which is not limited herein.
In an embodiment of the application, a water feed pump is arranged on a pipeline connecting a condensed water output end of the deaerator 8 and a condensed water input end of the high-pressure water supply heater group 9, and is used for supplying water to the high-pressure water supply heater group 9.
In an embodiment of the application, a condensed water output end of the condenser 6 is connected to an input end of a condensed water pump, and an output end of the condensed water pump is connected to a condensed water input end pipeline of the low-pressure feed water heater group through a sixth valve control module 10, and is used for providing condensed water to the low-pressure feed water heater group.
In the embodiment of the application, under the condition that the thermoelectric generator set has a downward or upward peak shaving requirement, the peak shaving control module controls the energy storage module to discharge energy.
The specific working process of the invention can comprise the following steps:
in an embodiment of the application, when there is no peak shaving requirement for the thermoelectric power unit, the peak shaving control module 100 controls the energy storage module 200 to store energy. Reheat steam among the specific geothermal motor group gets into the side input that releases heat of first heat transfer device 14, realize that reheat steam and the low temperature fused salt among the first heat transfer device 14 carry out the heat transfer, produce low temperature steam and high temperature fused salt, through the side output that releases heat of first heat transfer device 14, wherein, low temperature steam merges into the external heat supply of heat supply pipe network 24 after the pressure regulating of adjusting the temperature, the high temperature fused salt that produces behind the low temperature fused salt heat transfer is stored in hot salt jar 15, accomplish energy storage module 200's energy storage.
In an embodiment of the application, under the condition that the thermoelectric unit has a downward peak shaving requirement, the load of the boiler 1 is reduced to meet the low-load operation of the steam turbine, and at this time, if the maximum extraction steam volume of the thermoelectric unit cannot meet the steam of the hot user, the steam volume of the hot user has a gap, that is, under the condition that the maximum heat release volume at the output end of the heat release side of the first heat exchange device 14 cannot meet the requirement of the hot user, the energy storage module 200 needs to be controlled to release energy; open the switch of first valve control module 23, export the comdenstion water of oxygen-eliminating device 8 to the heat absorption side input of second heat transfer device 19, open the switch of second valve control module, high temperature fused salt and the comdenstion water heat transfer in the second heat transfer device, produce low temperature fused salt and high temperature steam, low temperature fused salt flows back to cold salt jar 19 through second heat transfer device 19's lava output, high temperature steam merges into the external heat supply of heat supply pipe network 24 through one of them output of three way valve, a peak regulation demand for satisfying decurrent, satisfy hot user's heat supply demand.
Specifically, the condensed water output by the deaerator 8 includes the steam output from the steam outlet of the intermediate pressure cylinder 3, the condensed water formed by the steam output from the second steam pipeline, and the condensed water output from the low-pressure feedwater heater group.
In an embodiment of the application, under the condition that the thermoelectric unit has an upward peak regulation demand, the boiler 1 is operated at full load to realize full load operation of the steam turbine, if the power generation processing condition of the thermoelectric unit cannot meet the upward peak regulation demand at this time, the switches of the third valve control module 11, the fourth valve control module 12 and the fifth valve control module 13 are closed, the steam outlet of the high-pressure cylinder 2, the steam outlet of the intermediate-pressure cylinder 3 and the steam outlet of the low-pressure cylinder 4 no longer input steam to the steam input end of the high-pressure feedwater heater group 9, the deaerator 8 and the low-pressure feedwater heater group 7 through the air extraction pipeline, the switches of the first valve control module 23 and the second valve control module 20 are simultaneously opened, condensed water output by the deaerator 8 enters the heat absorption side inlet of the second heat exchange device to realize heat exchange of high-temperature molten salt and condensed water, low-temperature molten salt and high-temperature molten salt steam are generated and flow back to the cold-pressure feedwater tank, and the high-temperature steam respectively enters the high-pressure steam through the first steam pipeline, the second steam pipeline, the third steam pipeline, the deaerator and the low-pressure feedwater heater group.
Specifically, high temperature steam is through the steam extraction pipeline heating deaerator 8 of first steam conduit incorporation high pressure feed water heater group 9 water supply after the pressure regulating that adjusts the temperature, high temperature steam is through the steam extraction pipeline heating low pressure feed water heater group 10 water supply that the second steam conduit incorporated into deaerator 8 after the pressure regulating that adjusts the temperature, high temperature steam is through the steam extraction pipeline heating condenser 6 water supply that the third steam conduit incorporated into low pressure feed water heater group 10 after the pressure regulating that adjusts the temperature for satisfy ascending peak regulation demand.
This application carries out the energy storage or releases through peak regulation control module control energy storage module, realizes having under the condition of peak regulation demand in the thermoelectric unit, according to the energy of energy storage module storage for make the thermoelectric unit in the peak regulation period, release through storage system can realize reaching the heat consumer steam volume demand, can satisfy the peak regulation demand again, improved unit peak regulation ability simultaneously, strengthened unit peak regulation operation flexibility, improve equipment utilization rate.
The embodiments of the present application have been described in detail with reference to the accompanying drawings, but the present application is not limited to the above embodiments. Even if various changes are made in the present application, the changes are still within the scope of the claims of the present application and the technical equivalents thereof.
Claims (10)
1. A thermoelectric unit energy storage peak shaving system, characterized by includes:
the peak regulation control module is in control connection with the energy storage module, is in communication connection with the power grid dispatching module and the thermoelectric unit control module, and is used for acquiring a peak regulation demand and controlling the energy storage or release of the energy storage module by controlling the on-off of the first valve control module and/or the second valve control module according to the peak regulation demand.
2. The thermoelectric power generation unit energy storage peak shaving system according to claim 1, wherein the peak shaving control module comprises: boiler, steam turbine, generator and auxiliary assembly, the steam turbine includes through pipeline consecutive high pressure jar, intermediate pressure jar and low pressure jar, auxiliary assembly includes condenser, low pressure feed water heater group, oxygen-eliminating device, high pressure feed water heater group, the condenser low pressure heater the pipeline of oxygen-eliminating device communicates in proper order, the delivery port of oxygen-eliminating device divide into two the tunnel, all the way with high pressure heater intercommunication, another one way is passed through first valve control module and second heat transfer device's heat absorption side entry intercommunication, the export of high pressure feed water heater group the steam extraction export of high pressure jar all with the entry of boiler passes through the tube coupling, the steam outlet of boiler include two the tunnel, respectively with the high pressure jar the intermediate pressure jar passes through the pipeline intercommunication.
3. The thermoelectric generating set energy storage peak shaving system according to claim 2, wherein the energy storage module comprises: the system comprises a first heat exchange device, a second heat exchange device, a cold salt tank, a hot salt tank, a cold salt pump and a hot salt pump, wherein a heat release side inlet of the first heat exchange device is connected with a steam extraction pipeline of reheated steam, a heat release side outlet of the first heat exchange device is connected with a heat supply pipe network of a thermoelectric unit, a molten salt input end of the first heat exchange device is connected with an output end of the cold salt pump, and a molten salt output end of the first heat exchange device is connected with an input end of the hot salt tank;
the molten salt input end of the second heat exchange device is connected with the output end of the hot salt pump through a pipeline, and the molten salt output end of the second heat exchange device is connected with the input end of the cold salt tank.
4. The thermoelectric generating set energy storage peak shaving system according to claim 3, wherein the steam output from the heat absorption side outlet of the second heat exchange device is divided into two paths by the second valve control module, one path is merged into the heat supply pipe network, and the other path enters the high-pressure water supply heater group, the deaerator and the low-pressure water supply heater group through a first steam pipeline, a second steam pipeline and a third steam pipeline respectively.
5. The thermoelectric unit energy storage peak shaving system according to claim 4, wherein the steam exhaust port of the high-pressure cylinder, the steam exhaust port of the intermediate-pressure cylinder and the steam exhaust port of the low-pressure cylinder are respectively connected with the steam input end of the high-pressure feed water heater group, the steam input end of the deaerator and the steam input end of the low-pressure feed water heater group through a third valve control module, a fourth valve control module and a fifth valve control module.
6. The thermoelectric generating set energy storage peak shaving system according to claim 3, wherein the second valve control module is a three-way valve.
7. A thermoelectric unit energy storage peak shaving method is applied to the thermoelectric unit energy storage system as claimed in claim 5, and is characterized in that the method comprises the following steps:
under the condition that the thermoelectric unit does not have the peak shaving requirement, the reheated steam exchanges heat with low-temperature molten salt through the heat release side inlet of the first heat exchange device to generate low-temperature steam and high-temperature molten salt,
the low-temperature steam is merged into after adjusting the temperature and the pressure the heat supply pipe network, the low-temperature fused salt is through behind the heat transfer of first heat transfer device the warp the heat release side export is generated the high-temperature fused salt is stored extremely the hot salt jar realizes the energy storage of energy storage module.
8. The thermoelectric power generation unit energy storage peak shaving method according to claim 7, further comprising:
and under the condition that the thermoelectric unit has the downward or upward peak shaving requirement, the peak shaving control module controls the energy storage module to discharge energy.
9. The thermoelectric power generation unit energy storage peak shaving method according to claim 8, wherein the method comprises the following steps:
reducing the boiler load in the presence of the peak shaver demand downward from the thermoelectric power unit;
under the condition that the maximum steam extraction quantity of the thermoelectric unit cannot meet the demand of a hot user, the switch of the first valve control module is opened, the feed water of the deaerator is output to the heat absorption side input end of the second heat exchange device, the switch of the second valve control module is opened, the high-temperature molten salt and water heat exchange is realized, the low-temperature molten salt and the high-temperature steam are generated, the low-temperature molten salt flows back to the cold salt tank, and the high-temperature steam is merged into the heat supply pipe network for supplying heat externally, so that the peak regulation demand is downward met.
10. The thermoelectric power generation unit energy storage peak shaving method according to claim 8, wherein the method comprises the following steps:
operating the boiler at full load with the upward peak shaver demand from the thermoelectric power unit;
the output of boiler can not satisfy under the circumstances of the ascending peak shaver demand of thermoelectric unit, close third valve control module fourth valve control module the switch of fifth valve control module is opened first valve control module with the switch of second valve control module realizes high temperature fused salt and water heat transfer produce low temperature fused salt and high temperature steam, low temperature fused salt flows back to in the cold salt jar, high temperature steam gets into through first steam conduit, second steam conduit, third steam conduit respectively after the pressure regulating temperature the deaerator in the low pressure feedwater heater group, be used for heating the deaerator feedwater the low pressure feedwater heater group feedwater, the condenser feedwater, be used for satisfying the ascending peak shaver demand.
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| CN202211245973.2A CN115653712A (en) | 2022-10-12 | 2022-10-12 | Thermoelectric unit energy storage peak regulation system and method |
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| CN202211245973.2A CN115653712A (en) | 2022-10-12 | 2022-10-12 | Thermoelectric unit energy storage peak regulation system and method |
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