CN219394438U - Distributed energy storage system for replacing alternating current power supply outside switch station - Google Patents
Distributed energy storage system for replacing alternating current power supply outside switch station Download PDFInfo
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- CN219394438U CN219394438U CN202223240703.0U CN202223240703U CN219394438U CN 219394438 U CN219394438 U CN 219394438U CN 202223240703 U CN202223240703 U CN 202223240703U CN 219394438 U CN219394438 U CN 219394438U
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Abstract
The application relates to the technical field of substations, in particular to a distributed energy storage system for replacing an alternating current power supply outside a switching station, which can solve the problems that the power supply outside the station is poor in power supply reliability, low in economic benefit and the like due to historical legacy, power grid planning, line corridor and the like to a certain extent. A distributed energy storage system for replacing an off-site ac power source of a switchyard comprising: a plurality of distributed energy storage systems, a plurality of station alternating current power supply systems and station alternating current screens; the discharging ends of the distributed energy storage systems are connected with the station alternating current screen, and the charging ends of the distributed energy storage systems are connected with the alternating current power supply system; the station outward ends of the plurality of station alternating current power supply systems are connected with an off-station transformer substation or an off-station circuit, and the station inward ends are connected with a station alternating current screen; the plurality of distributed energy storage systems and the plurality of station alternating current power supply systems are connected with the station main bus after passing through the station alternating current screen, and supply power to the station main bus.
Description
Technical Field
The application relates to the technical field of substations, in particular to a distributed energy storage system for replacing an alternating current power supply outside a switching station.
Background
The power supply for the switching station is an important link for guaranteeing safe and reliable operation of the switching station, and provides reliable power supply for a direct current charging device, a UPS, a cooling system, heating and ventilation equipment, an illumination system and a water supply and drainage system in the switching station.
At present, an alternating current power supply for an ultrahigh voltage switching station consists of two external power supplies for the switching station, and the switching station is powered by the two external power supplies.
However, due to historical carryover, power grid planning, line corridor and the like, the off-site power supply has the practical problems of poor power supply reliability, low economic benefit and the like.
Disclosure of Invention
In order to solve the problems that the power supply reliability and the economic benefit are low and the like of an off-site power supply caused by historical carry-over, power grid planning, line corridor and the like, the application provides a distributed energy storage system for replacing an off-site alternating current power supply of a switching station.
Embodiments of the present application are implemented as follows:
the embodiment of the application provides a distributed energy storage system for replacing an alternating current power supply outside a switch station, which comprises the following components: a plurality of distributed energy storage systems, a plurality of station alternating current power supply systems and station alternating current screens;
the discharging ends of the distributed energy storage systems are connected with the station alternating current screen, and the charging ends of the distributed energy storage systems are connected with the alternating current power supply system;
the station outward ends of the plurality of station alternating current power supply systems are connected with an off-station transformer substation or an off-station circuit, and the station inward ends are connected with the station alternating current screen;
and the distributed energy storage systems and the station alternating current power supply systems are connected with the station main bus after passing through the station alternating current screen, and supply power to the station main bus.
In some embodiments, the distributed energy storage system includes an energy storage battery assembly and an energy storage ac assembly;
one end of the energy storage battery assembly is connected with the station alternating current power supply system, the other end of the energy storage battery assembly is connected with the energy storage alternating current assembly, and the other end of the energy storage alternating current assembly is connected with the station alternating current screen.
In some embodiments, the energy storage ac assembly comprises an ac-dc inversion device, an isolation transformer, an ac inlet line device, and a distributed energy storage switch;
the energy storage battery assembly is connected with the station alternating current screen sequentially through the alternating current-direct current inversion equipment, the isolation transformer and the distributed energy storage switch.
In some embodiments, the energy storage cell assembly comprises a lithium iron phosphate electrochemical cell.
In some embodiments, the station ac power system includes an off-station power switch cabinet and an off-station power transformer;
one end of the off-site power switch cabinet is connected with an off-site transformer substation or an off-site circuit, the other end of the off-site power switch cabinet is connected with the off-site power transformer, and the other end of the off-site transformer is connected with the on-site alternating current screen.
The beneficial effects of this application: by combining the alternating current power supply for the switching station with the distributed energy storage technology, the advantages of the alternating current power supply are utilized to provide multiple supports such as standby, demand side response and the like for power grid operation, an external power supply system of the switching station is replaced, and the flexibility, economy and safety of the power supply system of the switching station are greatly improved, so that the problems existing in the aspects of construction, operation, maintenance and the like of the alternating current power supply for the switching station at present are solved, and the safety and the economy of the alternating current power supply for the switching station are effectively improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief description will be given below of the drawings that are needed in the embodiments or the prior art descriptions, it being obvious that the drawings in the following description are some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort to a person skilled in the art.
FIG. 1 is a schematic block diagram of a distributed energy storage system in place of a switchyard off-site AC power source provided in one embodiment of the present application;
fig. 2 is a schematic structural diagram of a distributed energy storage system according to another embodiment of the present disclosure, which replaces an ac power source outside a switchyard.
Illustration of:
reference numerals: 100. a first distributed energy storage system; 101. a second distributed energy storage system; 102. an energy storage battery assembly; 103. an energy storage ac assembly; 104. ac/dc inversion equipment; 105. a separation transformer; 106. a distributed energy storage switch; 200. an alternating current power supply system for the first station; 201. a second station ac power system; 202. an off-site power switch cabinet; 203. an off-site power transformer; 300. station ac screen.
Detailed Description
For purposes of clarity, embodiments and advantages of the present application, the following description will make clear and complete the exemplary embodiments of the present application, with reference to the accompanying drawings in the exemplary embodiments of the present application, it being apparent that the exemplary embodiments described are only some, but not all, of the examples of the present application.
It should be noted that the brief description of the terms in the present application is only for convenience in understanding the embodiments described below, and is not intended to limit the embodiments of the present application. Unless otherwise indicated, these terms should be construed in their ordinary and customary meaning.
The terms "first," second, "" third and the like in the description and in the claims and in the above drawings are used for distinguishing between similar or similar objects or entities and not necessarily for describing a particular sequential or chronological order, unless otherwise indicated. It is to be understood that the terms so used are interchangeable under appropriate circumstances.
The terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a product or apparatus that comprises a list of elements is not necessarily limited to all elements explicitly listed, but may include other elements not expressly listed or inherent to such product or apparatus.
The terms "disposed about," "connected to" and "connected to" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.
The utility model combines the alternating current power supply for the switchyard with the distributed energy storage technology, utilizes its advantage, provides multiple support such as reserve, demand side response for the electric wire netting operation, replaces the external power supply system of switchyard, improves the flexibility, economy and the important means of security of the power consumption system of switchyard greatly to solve the problem that the alternating current power supply for the switchyard exists in the aspect of construction, operation, maintenance etc. at present, effectively improve its security and economy.
Fig. 1 is a schematic block diagram of a distributed energy storage system that replaces an ac power supply outside a switchyard according to an embodiment of the present application, and fig. 2 is a schematic structural diagram of a distributed energy storage system that replaces an ac power supply outside a switchyard according to another embodiment of the present application.
As shown in fig. 1 and 2, a distributed energy storage system for replacing an ac power source outside a switchyard of the present application includes: a plurality of distributed energy storage systems, a plurality of station ac power systems, and a station ac screen 300.
In this embodiment, two distributed energy storage systems and two ac power systems for stations are provided, including a first distributed energy storage system 100, a second distributed energy storage system 101, a first ac power system 200 for stations, and a second ac power system 201 for stations.
And the discharging ends of the distributed energy storage systems are connected with the station alternating current screen 300, and the charging ends of the distributed energy storage systems are connected with the alternating current power supply system.
The line outlet segment of each distributed energy storage system is connected with the station alternating current screen 300, the line inlet ends of the distributed energy storage systems are respectively connected with different alternating current power supply systems, the alternating current power supply systems can charge the distributed energy storage systems, and meanwhile the distributed energy storage systems can supply power to the station alternating current screen 300.
The outward ends of the plurality of the ac power supply systems for the station are all connected to an off-station substation or an off-station line, and the inward ends are all connected to the ac screen 300 for the station.
The incoming line end of each station alternating current power supply system is connected with an off-station transformer substation or an off-station line, the other end of each station alternating current power supply system is connected with a station alternating current screen 300, and power is supplied through the off-station power supply station alternating current screen 300.
The plurality of distributed energy storage systems and the plurality of station ac power supply systems are connected to a station main bus after passing through the station ac panel 300, and supply power to the station main bus.
The station ac screen 300 is an ac distribution screen, is a branch switch control distribution cabinet, can monitor total voltage and current or branch voltage and current service conditions in the whole power system, and can switch branches according to the required conditions so as to achieve centralized and effective control and monitoring of the power supply of the low-voltage ac power supply to the electric equipment; meanwhile, the alternating current distribution panel is one of the most ideal distribution equipment of the mobile base station, can monitor and protect a power supply system, and has the control functions of switching on, switching off and switching between a power supply and various loads, realizing a specified operation mode and the like.
In this embodiment, each distributed energy storage system and each station ac power system are connected to the station main bus through the station ac panel 300, and supply power to the station main bus for use by the total station load.
In some embodiments, the distributed energy storage system comprises an energy storage battery assembly 102 and an energy storage ac assembly 103;
one end of the energy storage battery assembly 102 is connected with the station alternating current power supply system, the other end of the energy storage battery assembly 102 is connected with the energy storage alternating current assembly 103, and the other end of the energy storage alternating current assembly 103 is connected with the station alternating current screen 300.
The wire inlet end of the energy storage battery assembly 102 is connected with the wire outlet end of the station alternating current power supply system, the wire outlet end of the energy storage battery assembly 102 is connected with the wire inlet end of the energy storage alternating current assembly 103, and the wire outlet end of the energy storage alternating current assembly 103 is connected with the station alternating current screen 300.
In some embodiments, the energy storage ac component 103 includes an ac-dc inversion device 104, an isolation transformer, an ac-line device, and a distributed energy storage switch 106;
the energy storage battery assembly 102 is connected with the station ac screen 300 sequentially through the ac/dc inverter 104, the isolation transformer and the distributed energy storage switch 106.
The outlet end of the energy storage battery assembly 102 is sequentially connected with the ac/dc inverter 104, the isolation transformer and the distributed energy storage switch 106, and one end of the distributed energy storage, which is not connected with the isolation transformer, is connected with the station ac screen 300.
In some embodiments, the energy storage cell assembly 102 comprises a lithium iron phosphate electrochemical cell.
In some embodiments, the station ac power system includes an off-station power switch cabinet 202 and an off-station power transformer 203;
one end of the off-site power switch cabinet 202 is connected with an off-site transformer substation or an off-site circuit, the other end of the off-site power switch cabinet 202 is connected with the off-site power transformer 203, and the other end of the off-site transformer is connected with the off-site alternating current screen 300.
The wire inlet end of the off-site power switch cabinet 202 is connected with an off-site sideband station or an off-site circuit, the wire outlet end of the off-site power switch cabinet 202 is connected with the wire inlet end of an off-site power transformer 203, the wire outlet end of the off-site transformer is connected with the station alternating current screen 300 and the distributed energy storage system, and the distributed energy storage system can be charged through an off-site power supply and is powered by the station alternating current screen 300.
In the above embodiment, the different devices are connected by wires,
the embodiments in this specification are described in a progressive manner, and identical and similar parts of the embodiments are all referred to each other, and each embodiment is mainly described as different from other embodiments.
In a conventional operation state, the first ac power system 200 supplies power to the loads for the whole station through the power transmission paths of the "off-station transformer station or off-station line, the off-station power switch cabinet 202, the off-station power transformer 203, and the station ac panel 300", and the second ac power system 201 is used as a backup.
In some embodiments of the present application, in a normal operation state, the first station ac system provides electric energy to the total station load through the power transmission paths of the "off-station transformer station or off-station line, the off-station power switch cabinet 202, the off-station power transformer 203 and the station ac screen 300", and at the same time, the first station ac power system 200 also charges the first distributed energy storage system 100 and the second distributed energy storage system 101, and the second station ac power system 201 is used as a standby.
In some embodiments of the present application, when the ac power source for the first station overhauls or fails, the ac power source for the second station 201 is used to supply power, and when the ac power source for the second station 201 also repairs or fails, the first distributed energy storage system 100 and the second distributed energy storage system 101 are used to supply power to the main bus for the station through the power transmission paths of the "energy storage battery device, ac/dc inverter, isolation transformer, distributed energy storage switch 106 and ac screen for the station 300", so as to be used by the load for the whole station.
By constructing the distributed energy storage system, when an off-site power supply is unreliable, power is supplied through the distributed energy storage system, and the allocation flexibility and the electricity utilization safety reliability of the alternating current power supply system for the substation applying the distributed energy storage are improved.
The foregoing description, for purposes of explanation, has been presented in conjunction with specific embodiments. However, the above discussion in some examples is not intended to be exhaustive or to limit the embodiments to the precise forms disclosed above. Many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles and the practical application, to thereby enable others skilled in the art to best utilize the embodiments and various embodiments with various modifications as are suited to the particular use contemplated.
Claims (5)
1. A distributed energy storage system for replacing an off-site ac power source of a switchyard, comprising: a plurality of distributed energy storage systems, a plurality of station alternating current power supply systems and station alternating current screens;
the discharging ends of the distributed energy storage systems are connected with the station alternating current screen, and the charging ends of the distributed energy storage systems are connected with the alternating current power supply system;
the station outward ends of the plurality of station alternating current power supply systems are connected with an off-station transformer substation or an off-station circuit, and the station inward ends are connected with the station alternating current screen;
and the distributed energy storage systems and the station alternating current power supply systems are connected with the station main bus after passing through the station alternating current screen, and supply power to the station main bus.
2. The distributed energy storage system for replacing an off-site ac power source of claim 1, wherein said distributed energy storage system comprises an energy storage battery assembly and an energy storage ac assembly;
one end of the energy storage battery assembly is connected with the station alternating current power supply system, the other end of the energy storage battery assembly is connected with the energy storage alternating current assembly, and the other end of the energy storage alternating current assembly is connected with the station alternating current screen.
3. The distributed energy storage system for replacing an off-site ac power supply of claim 2, wherein said energy storage ac assembly comprises an ac-dc inverter device, an isolation transformer, an ac inlet line device, and a distributed energy storage switch;
the energy storage battery assembly is connected with the station alternating current screen sequentially through the alternating current-direct current inversion equipment, the isolation transformer and the distributed energy storage switch.
4. A distributed energy storage system in place of a switchyard external ac power source according to claim 2, wherein said energy storage battery assembly comprises lithium iron phosphate electrochemical cells.
5. The distributed energy storage system for replacing a switchyard external ac power source of claim 1, wherein said station ac power source system comprises an external power switch cabinet and an external power transformer;
one end of the off-site power switch cabinet is connected with an off-site transformer substation or an off-site circuit, the other end of the off-site power switch cabinet is connected with the off-site power transformer, and the other end of the off-site power transformer is connected with the station alternating current screen.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223240703.0U CN219394438U (en) | 2022-12-02 | 2022-12-02 | Distributed energy storage system for replacing alternating current power supply outside switch station |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223240703.0U CN219394438U (en) | 2022-12-02 | 2022-12-02 | Distributed energy storage system for replacing alternating current power supply outside switch station |
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| Publication Number | Publication Date |
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| CN219394438U true CN219394438U (en) | 2023-07-21 |
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| CN202223240703.0U Active CN219394438U (en) | 2022-12-02 | 2022-12-02 | Distributed energy storage system for replacing alternating current power supply outside switch station |
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