CN217882865U - Thermal power high-voltage direct-hanging energy storage system - Google Patents
Thermal power high-voltage direct-hanging energy storage system Download PDFInfo
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- CN217882865U CN217882865U CN202221653349.1U CN202221653349U CN217882865U CN 217882865 U CN217882865 U CN 217882865U CN 202221653349 U CN202221653349 U CN 202221653349U CN 217882865 U CN217882865 U CN 217882865U
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Abstract
The utility model provides a thermoelectricity high pressure is directly hung energy storage system, the system includes: the system comprises a thermal power grid-connected backup and starting transformer unit, an energy storage and power supply unit and a thermal power plant unit; the thermal power grid-connected startup and standby transformer unit is respectively connected with the energy storage power supply unit and the thermal power plant unit; the energy storage power supply unit is connected with the thermal power plant unit; wherein, the energy storage power supply unit includes: energy storage equipment and energy storage grid-connected switch. According to the technical scheme, the energy storage power supply unit is directly hung to the starting and standby low-voltage side of the thermal power unit and connected in parallel with the thermal power unit as a stable voltage source, the stable voltage source participates in the frequency adjustment process of a response power grid, and meanwhile, the stable voltage source can also be used as a factory 400V load standby power supply, so that the power supply reliability of the thermal power plant is improved.
Description
Technical Field
The utility model relates to an energy storage system technical field especially relates to a thermoelectricity high pressure is directly hung energy storage system.
Background
The large-scale energy storage technology is one of key technical supports for energy revolution, and has recently received extensive attention in the industry because the large-scale energy storage technology can provide various auxiliary services such as peak shaving, frequency modulation, emergency power supply and the like for a power grid. The hybrid energy storage system composed of the electrochemical energy storage and the lithium battery is connected with the thermal power generating unit through the current converter, has power bidirectional flowing capacity, and has the advantages of being rapid in power regulation, various in application modes and the like. However, the existing energy storage equipment connected with the thermal power generating unit can realize power supply only through high-rise power station transformation, so that the electric energy loss is large, and meanwhile, the voltage stability provided by an energy storage system is poor.
Disclosure of Invention
The utility model provides a thermoelectricity high pressure is directly hung energy storage system to solve the great technical problem of electric energy loss volume in the correlation technique at least.
An embodiment of a first aspect of this application provides a thermal power high pressure is directly hung energy storage system, includes: the system comprises a thermal power grid-connected startup and standby transformer unit, an energy storage and power supply unit and a thermal power plant unit;
the thermal power grid-connected startup and standby transformer unit is respectively connected with the energy storage power supply unit and the thermal power plant unit;
the energy storage power supply unit is connected with the thermal power plant unit;
wherein, the energy storage power supply unit includes: energy storage equipment and energy storage grid-connected switch.
The technical scheme provided by the embodiment of the application at least has the following beneficial effects:
the utility model provides a thermoelectricity high pressure is directly hung energy storage system, include: the system comprises a thermal power grid-connected startup and standby transformer unit, an energy storage and power supply unit and a thermal power plant unit; the thermal power grid-connected startup and standby transformer unit is respectively connected with the energy storage power supply unit and the thermal power plant unit; the energy storage power supply unit is connected with the thermal power plant unit; wherein, the energy storage power supply unit includes: energy storage equipment and energy storage grid-connected switch. The technical scheme that this application provided directly hangs to thermal power unit and starts the outfit to become the low-voltage side through energy storage power supply unit, connects in parallel with thermal power unit as stable voltage source, participates in the response electric wire netting frequency control in-process, also can regard as the mill to use 400V load stand-by power supply simultaneously, improves thermal power plant's power supply reliability.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a thermal power high-voltage direct-hanging energy storage system provided in an embodiment of the present invention;
description of reference numerals:
the system comprises a thermal power grid-connected startup and standby transformer unit 1, an energy storage power supply unit 2, a thermal power plant unit 3, generators 1-1, thermal power grid-connected buses 1-2, generator main transformers 1-3, split winding startup and standby transformers 1-4, a startup and standby transformer 6kV low-voltage side A branch bus 1-5 1-6 parts of a B branch bus at the low-voltage side of a 6kV backup transformer, 2-1 parts of energy storage equipment, 2-2 parts of an energy storage grid-connected switch, 2-3 parts of an energy storage equipment converter, 2-4 parts of an energy storage equipment isolating switch, 2-5 parts of an energy storage boosting transformer, 2-6 parts of a factory 400V backup bus, 3-1 part of a high-voltage bus at the 20kV high-voltage side of a high-voltage factory transformer the split winding high-voltage substation is 3-2, the high-voltage substation is 3-3 of a 6kV low-voltage side A branch bus, the high-voltage substation is 3-4 of a 6kV low-voltage side B branch bus, the low-voltage substation is 3-5 of a grid-connected switch, the double-winding low-voltage substation is 3-6, a 400V substation first bus is 3-7, a 400V substation load switch is 3-8, a substation load is 3-9, a standby power supply switch is 3-10, a 6kV substation A section load switch is 3-11, a 6kV substation A section load is 3-12, a 6kV substation B section load switch is 3-13, and a 6kV substation B section load is 3-14.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention. On the contrary, the embodiments of the invention include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.
The present invention will be described in detail with reference to specific examples.
Fig. 1 is the embodiment of the utility model provides a thermal power high pressure hangs energy storage system's schematic structure view directly.
As shown in fig. 1, the embodiment of the utility model provides a pair of thermal power high pressure is directly hung energy storage system, a serial communication port, include: the system comprises a thermal power grid-connected startup and standby transformer unit 1, an energy storage and power supply unit 2 and a thermal power plant unit 3;
the thermal power grid-connected startup and standby transformer unit 1 is respectively connected with the energy storage and power supply unit 2 and the thermal power plant unit 3;
the energy storage power supply unit 2 is connected with the thermal power plant unit 3;
wherein, the energy storage power supply unit 2 comprises: the energy storage device 2-1 and the energy storage grid-connected switch 2-2.
The embodiment of the utility model provides an in, thermal power is incorporated into power networks and is started and prepare becomes unit 1 and include: the system comprises a generator 1-1, a thermal power grid-connected bus 1-2 and a generator main transformer 1-3;
the generator 1-1 is connected with the thermal power grid-connected bus 1-2 through the generator main transformer 1-3.
It should be noted that the thermal power grid-connected starting and standby power converter unit 1 further includes: the split winding starting-standby transformer is 1-4, the starting-standby transformer is 6kV low-voltage side A branch bus is 1-5, and the starting-standby transformer is 6kV low-voltage side B branch bus is 1-6;
the high-voltage side of the split winding starting and standby transformer 1-4 is connected with the thermal power grid-connected bus 1-2, and the low-voltage side of the split winding starting and standby transformer 1-4 is respectively connected with the starting and standby transformer 6kV low-voltage side A branch bus 1-5 and the starting and standby transformer 6kV low-voltage side B branch bus 1-6.
In the embodiment of the present invention, the energy storage and power supply unit 2 further includes: the energy storage equipment converter device 2-3, the energy storage equipment isolating switch 2-4 and the energy storage boosting transformer 2-5;
the energy storage equipment 2-1 is connected with the energy storage equipment isolating switch 2-4 through the energy storage equipment current conversion device 2-3;
the energy storage device isolating switch 2-4 is connected with the energy storage grid-connected switch 2-2 through the energy storage boosting transformer 2-5.
In an example, the energy storage device 2-1 forms 20kV alternating current through the energy storage device current conversion device 2-3 and the energy storage boosting transformer 2-5, the electric energy is reversely transmitted through the split winding starting transformer 1-4, and the energy storage and thermal power unit jointly responds to a power grid frequency modulation command, wherein the energy storage device 2-1 does not pass through a high plant transformer and can quickly respond to the frequency modulation command.
Further, the energy storage power supply unit 2 further includes: 2-6 of factory 400V standby bus;
one end of the plant 400V standby bus 2-6 is connected with the energy storage boosting transformer 2-5, and the other end of the plant 400V standby bus is connected with the thermal power plant unit 3.
It should be noted that the energy storage grid-connected switch 2-2 is connected with the B branch bus 1-6 at the low-voltage side of the starting-standby transformer 6 kV.
In the embodiment of the present invention, unit 3 for thermal power plant includes: 3-1 parts of a high-voltage substation 20kV high-voltage bus, 3-2 parts of a split winding high-voltage substation, 3-3 parts of a high-voltage substation 6kV low-voltage side A branch bus, 3-4 parts of a high-voltage substation 6kV low-voltage side B branch bus, 3-5 parts of a low-voltage substation grid-connected switch, 3-6 parts of a double-winding low-voltage substation, 3-7 parts of a 400V substation first bus, 3-8 parts of a 400V substation load switch, 3-9 parts of a substation load and 3-10 parts of a standby power supply switch;
the high-voltage side of the split winding high-voltage transformer 3-2 is connected with an outlet of the generator 1-1 through the high-voltage transformer 20kV bus 3-1, and the low-voltage side of the split winding high-voltage transformer 3-2 is respectively connected with the high-voltage transformer 6kV low-voltage side A branch bus 3-3 and the high-voltage transformer 6kV low-voltage side B branch bus 3-4;
one end of the double-winding low-voltage station transformer 3-6 is connected with the B branch bus 3-4 at the 6kV low-voltage side of the high-voltage station transformer through the low-voltage station transformer grid-connected switch 3-5, and the other end of the double-winding low-voltage station transformer is connected with the 400V station transformer first bus 3-7;
the factory load 3-9 is connected with the 400V factory first bus 3-7 through the 400V factory load switch 3-8;
one end of the standby power supply switch 3-10 is connected with the first bus 3-7 for 400V station service, and the other end is connected with the energy storage power supply unit 2.
Illustratively, when the energy storage device 2-1 needs to supply power to a 400V station load, the energy storage grid-connected switch 2-2 is disconnected through a 400V station standby bus 2-6 and a closed standby power supply switch 3-10, so that the energy storage device 2-1 can be used as a 400V station standby power supply, and the energy storage device 2-1 supplies power to a station load 3-9, namely, the 400V station load.
It should be noted that latching logic is arranged between the energy storage grid-connected switch 2-2 and the standby power supply switch 3-10.
For example, when the energy storage grid-connected switch 2-2 is closed, the standby power supply switch 3-10 is always in an open state and cannot be closed; when the standby power supply switch 3-10 is closed, the energy storage grid-connected switch 2-2 is always in an open state and cannot be closed. The locking logic arranged between the energy storage grid-connected switch 2-2 and the standby power supply switch 2-2 can effectively prevent the energy storage equipment 2-1 from being damaged due to closed-loop operation caused by the simultaneous on-state.
Further, the high-voltage side of the split winding high-voltage substation 3-2 is connected with the A branch bus 1-5 of the starting-up substation 6kV low-voltage side through the high-voltage substation 20kV bus 2-1, and the low-voltage side of the split winding high-voltage substation 3-2 is respectively connected with the A branch bus 3-3 of the high-voltage substation 6kV low-voltage side and the B branch bus 3-4 of the high-voltage substation 6kV low-voltage side.
Illustratively, when a 6kV factory A-section load 3-12 and a 6kV factory B-section load 3-14 need electric energy, the standby power supply switch 3-10 is switched off, the energy storage grid-connected switch 2-2, the 6kV factory A-section load switch 3-11 and the 6kV factory B-section load switch 3-13 are switched on, the energy storage equipment 2-1 forms 20kV alternating current through the energy storage equipment converter 2-3 and the energy storage step-up transformer 2-5, the electric energy is reversely transmitted through the split winding starting transformer 1-4, and the electric energy is transmitted to the 6kV factory A-section load 3-12 and the 6kV factory B-section load 3-14 through the high-voltage factory transformer 20kV high-voltage bus 3-1.
It should be noted that the thermal power plant unit 3 further includes: 3-11 parts of a 6kV factory A section load switch and 3-12 parts of a 6kV factory A section load;
and the 6kV factory A section load 3-12 is connected with the high-voltage factory transformer 6kV low-voltage side A branch bus 3-3 through the 6kV factory A section load switch 3-11.
The unit 3 for a thermal power plant further comprises: 3-13 parts of a 6kV B-section factory load switch and 3-14 parts of a 6kV B-section factory load;
and the 6kV factory B-section load 3-14 is connected with the high-voltage factory-transformer 6kV low-voltage side B branch bus 3-4 through the 6kV factory B-section load switch 3-13.
Illustratively, an energy storage device 2-1 outputs electric energy, the output electric energy is converted from voltage direct current to low-voltage alternating current through an energy storage device converter device 2-3, the energy storage device isolating switch 2-4 is connected, when high-voltage electric energy needs to be provided, the low-voltage alternating current is boosted through an energy storage boosting transformer 2-5 to obtain high-voltage alternating current, then the high-voltage alternating current is transmitted to a starting-up transformer 6kV low-voltage side B branch bus 1-6 through an energy storage grid-connected switch 2-2, and when the low-voltage electric energy is needed, the plant 400V standby bus 2-6 and a thermal power plant unit 3 are used.
To sum up, the thermal power high pressure directly hangs energy storage system that this embodiment provided, the system includes: the system comprises a thermal power grid-connected startup and standby transformer unit, an energy storage and power supply unit and a thermal power plant unit; the thermal power grid-connected startup and standby transformer unit is respectively connected with the energy storage power supply unit and the thermal power plant unit; the energy storage power supply unit is connected with the thermal power plant unit; wherein, the energy storage power supply unit includes: energy storage equipment and energy storage grid-connected switch. The technical scheme that this application provided directly hangs to thermal power unit and starts the outfit to become the low-voltage side through energy storage power supply unit, connects in parallel with thermal power unit as stable voltage source, participates in the response electric wire netting frequency control in-process, also can regard as the mill to use 400V load stand-by power supply simultaneously, improves thermal power plant's power supply reliability.
In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.
While embodiments of the present application have been shown and described above, it will be understood that the above embodiments are exemplary and should not be construed as limiting the present application and that changes, modifications, substitutions and alterations in the above embodiments may be made by those of ordinary skill in the art within the scope of the present application.
Claims (10)
1. The utility model provides a thermal power high pressure hangs energy storage system directly which characterized in that includes: the system comprises a thermal power grid-connected startup and standby transformer unit, an energy storage and power supply unit and a thermal power plant unit;
the thermal power grid-connected startup and standby transformer unit is respectively connected with the energy storage power supply unit and the thermal power plant unit;
the energy storage power supply unit is connected with the thermal power plant unit;
wherein, the energy storage power supply unit includes: energy storage equipment and energy storage grid-connected switch.
2. The thermal power high-voltage direct-hanging energy storage system according to claim 1, wherein the thermal power grid-connected standby power converter unit comprises: the system comprises a generator, a thermal power grid-connected bus and a generator main transformer;
the generator is connected with the thermal power grid-connected bus through the generator main transformer.
3. The thermal power high-voltage direct-hanging energy storage system according to claim 2, wherein the thermal power grid-connected starting and standby converter unit further comprises: the split winding starting-standby transformer, a starting-standby transformer 6kV low-voltage side A branch bus and a starting-standby transformer 6kV low-voltage side B branch bus;
the high-voltage side of the split winding starting-standby transformer is connected with the thermal power grid-connected bus, and the low-voltage side of the split winding starting-standby transformer is respectively connected with the A branch bus of the 6kV low-voltage side of the starting-standby transformer and the B branch bus of the 6kV low-voltage side of the starting-standby transformer.
4. The thermal power high-voltage direct-hanging energy storage system according to claim 3, wherein the energy storage and power supply unit further comprises: the energy storage equipment converter device, the energy storage equipment isolating switch and the energy storage step-up transformer;
the energy storage equipment is connected with the energy storage equipment isolating switch through the energy storage equipment current conversion device;
and the energy storage equipment isolating switch is connected with the energy storage grid-connected switch through the energy storage boosting transformer.
5. The thermal power high-voltage direct-hanging energy storage system according to claim 4, wherein the energy storage and power supply unit further comprises: a factory 400V standby bus;
one end of the factory-used 400V standby bus is connected with the energy storage boosting transformer, and the other end of the factory-used 400V standby bus is connected with the thermal power factory-used unit.
6. The thermal power high-voltage direct-hanging energy storage system according to claim 5, wherein the energy storage grid-connected switch is connected with a B branch bus of a 6kV low-voltage side of the starting-standby transformer.
7. The thermal power high-voltage direct-hanging energy storage system according to claim 6, wherein the thermal power plant unit comprises: the system comprises a high-voltage substation 20kV high-voltage bus, a split winding high-voltage substation, a high-voltage substation 6kV low-voltage side A branch bus, a high-voltage substation 6kV low-voltage side B branch bus, a low-voltage station grid-connected switch, a double-winding low-voltage station substation, a 400V station first bus, a 400V station load switch, a station load and a standby power supply switch;
the high-voltage side of the split winding high-voltage substation is connected with the outlet of the generator through the high-voltage substation 20kV bus, and the low-voltage side of the split winding high-voltage substation is respectively connected with the high-voltage substation 6kV low-voltage side A branch bus and the high-voltage substation 6kV low-voltage side B branch bus;
one end of the double-winding low-voltage station transformer is connected with the B branch bus at the low-voltage side of the high-voltage station transformer 6kV through the low-voltage station transformer grid-connected switch, and the other end of the double-winding low-voltage station transformer is connected with the 400V station transformer first bus;
the plant load is connected with the 400V plant first bus through the 400V plant load switch;
one end of the standby power supply switch is connected with the 400V station-service first bus, and the other end of the standby power supply switch is connected with the energy storage power supply unit.
8. The thermal power high-voltage direct-hanging energy storage system according to claim 7, wherein a high-voltage side of the split-winding high-voltage substation is connected with the starting-up substation 6kV low-voltage side A branch bus through the high-voltage substation 20kV bus, and a low-voltage side of the split-winding high-voltage substation is respectively connected with the high-voltage substation 6kV low-voltage side A branch bus and the high-voltage substation 6kV low-voltage side B branch bus.
9. The thermal power high voltage direct-hanging energy storage system according to claim 8, wherein the thermal power plant unit further comprises: a 6kV factory A section load switch and a 6kV factory A section load;
the 6kV factory A section load is connected with the high-voltage factory transformer 6kV low-voltage side A branch bus through the 6kV factory A section load switch.
10. The thermal power high voltage direct-hanging energy storage system according to claim 8, wherein the thermal power plant unit further comprises: a 6kV station B section load switch and a 6kV station B section load;
and the 6kV station B section load is connected with the high-voltage station transformer 6kV low-voltage side B branch bus through the 6kV station B section load switch.
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| CN202221653349.1U CN217882865U (en) | 2022-06-29 | 2022-06-29 | Thermal power high-voltage direct-hanging energy storage system |
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| CN202221653349.1U CN217882865U (en) | 2022-06-29 | 2022-06-29 | Thermal power high-voltage direct-hanging energy storage system |
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