CN112787394A - Transformer substation direct current bus type distributed parallel direct current power supply system with prefabricated cabin - Google Patents
Transformer substation direct current bus type distributed parallel direct current power supply system with prefabricated cabin Download PDFInfo
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- CN112787394A CN112787394A CN202011365451.7A CN202011365451A CN112787394A CN 112787394 A CN112787394 A CN 112787394A CN 202011365451 A CN202011365451 A CN 202011365451A CN 112787394 A CN112787394 A CN 112787394A
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- prefabricated cabin
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J11/00—Circuit arrangements for providing service supply to auxiliaries of stations in which electric power is generated, distributed or converted
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0019—Circuits for equalisation of charge between batteries using switched or multiplexed charge circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0069—Charging or discharging for charge maintenance, battery initiation or rejuvenation
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a transformer substation direct-current bus type distributed parallel direct-current power supply system with a prefabricated cabin, which comprises a transformer substation power supply unit, a 220KV prefabricated cabin unit, a 110KV prefabricated cabin unit and a secondary equipment room unit, wherein the 220KV prefabricated cabin unit and the 110KV prefabricated cabin unit are both electrically connected with the transformer substation power supply unit, the 220KV prefabricated cabin unit and the 110KV prefabricated cabin unit are respectively and electrically connected with the secondary equipment room unit, the 220KV prefabricated cabin unit and the 110KV prefabricated cabin unit both comprise a parallel storage battery module and a high-frequency switch module, the application of the parallel intelligent power supply system opens up a brand new direct-current system, the system can automatically realize on-line nuclear capacity maintenance on a battery pack, realize life cycle management, can produce a good effect in practical application, can greatly prolong the service life of the storage battery and improve the utilization rate of the old storage battery, the safety performance of the direct-current power storage system in the whole substation power system is greatly improved.
Description
Technical Field
The invention relates to the technical field of direct-current power supply systems, in particular to a transformer substation direct-current bus type distributed parallel direct-current power supply system with a prefabricated cabin.
Background
The transformer substation is a place for converting voltage and current in an electric power system, receiving electric energy and distributing the electric energy, the transformer substation in a power plant is a step-up transformer substation, the function of the step-up transformer substation is to feed the electric energy generated by a generator into a high-voltage power grid after the electric energy is boosted, the whole transformer substation system comprises various complex and dangerous small units and systems at all levels, a direct-current storage battery system is included, the storage battery is equipment for storing direct-current electric energy, the storage battery can convert the electric energy into chemical energy for storage (charging), and the chemical energy is converted into the electric energy (discharging) during use to supply to a direct-current load, and the conversion process of the energy is reversible.
In the whole substation power system, a direct current storage battery system is the final guarantee of the power supply reliability of secondary equipment such as substation power system protection and the like, the reliability of the direct current storage battery system is related to the power supply safety of the whole power system, the direct current systems currently used all adopt a battery series connection mode to supply power for a direct current bus, the single fault of the storage battery exists in the series connection mode to influence the whole electric quantity output, the damage of the storage battery part can cause the scrapping of the whole storage battery pack, the defects that the storage battery cannot be subjected to online capacity checking and the like exist, in order to solve the series problems and improve the stability and the safety of the whole substation, the direct current storage battery system in the power system of the substation needs to be highly.
Therefore, a brand new direct current system is developed by applying the parallel intelligent power supply system, the system can automatically realize online capacity checking maintenance on the battery pack, life cycle management is realized, a good effect can be generated in practical application, the service life of the storage battery can be greatly prolonged, the utilization rate of the old storage battery is improved, and in the design of the direct current power supply, the distributed parallel intelligent direct current power supply is dispersedly arranged according to different load properties in order to ensure the reliability of important loads.
Disclosure of Invention
The invention aims to provide a transformer substation direct current bus type distributed parallel direct current power supply system with a prefabricated cabin, and aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a transformer substation direct-current bus type distributed parallel direct-current power supply system with prefabricated cabins comprises a transformer substation power supply unit, a 220KV prefabricated cabin unit, a 110KV prefabricated cabin unit and a secondary equipment room unit, wherein the 220KV prefabricated cabin unit and the 110KV prefabricated cabin unit are electrically connected with the transformer substation power supply unit, and the 220KV prefabricated cabin unit and the 110KV prefabricated cabin unit are respectively and electrically connected with the secondary equipment room unit.
The 220KV prefabricated cabin unit and the 110KV prefabricated cabin unit both comprise a parallel storage battery module and a high-frequency switch module, the input end of the high-frequency switch module is electrically connected with the output end of a power supply unit of the transformer substation, the input end of the parallel storage battery module is electrically connected with the output end of the high-frequency switch module, a brand new direct current system is developed by the application of a parallel intelligent power supply system, the system can automatically realize on-line nuclear capacity maintenance on a battery pack and life cycle management, a good effect can be produced in practical application, the service life of the storage battery can be greatly prolonged, the utilization rate of the old storage battery can be improved, the safety performance of the direct current storage system in the whole transformer substation power system can be greatly improved, and thus, even if one or more groups of direct current storage battery systems are damaged or have faults, the basic operation of the transformer substation can be continued, the terminal of transformer substation work is avoided, and the use is influenced, and when single group or multiunit battery module has the damage, can not influence the normal work of all other battery systems of group and the work of whole transformer substation system simultaneously, improves the security and the stability of whole transformer substation system by a wide margin.
Preferably, the parallel direct current bus sections of the secondary equipment room unit are linked with the direct current bus sections of the 220KV prefabricated cabin unit and the 110KV prefabricated cabin unit through a bus connection.
Preferably, the high-frequency switch module comprises a first group of output channels, a second group of output channels and a third group of output channels, the first group of output channels, the second group of output channels and the third group of output channels are electrically connected with the output end of the power supply unit of the transformer substation through bus bars, the first group of output channels, the second group of output channels and the third group of output channels are in parallel connection, and the first group of output channels, the second group of output channels and the third group of output channels are electrically connected with the bus bars of the parallel battery modules.
Preferably, the first set of output channels includes channel 1 and channel 2, the second set of output channels includes channel 3 and channel 4, and the third set of output channels includes channel 5 and channel 6.
Preferably, the channels 1 and 3, the channels 3 and 4, and the channels 5 and 6 are electrically connected by circuit breakers, and the channels 1, 4 and 6 are electrically connected to the bus sections of the parallel battery modules by contactors and wires.
Preferably, the parallel storage battery module comprises a first battery pack, a second battery pack and a third battery pack, input ends of the first battery pack, the second battery pack and the third battery pack are electrically connected with the bus section through leads and circuit breakers, and output ends of the first battery pack, the second battery pack and the third battery pack are electrically connected with the direct current bus sections of the 220KV prefabricated cabin unit and the 110KV prefabricated cabin unit through leads and circuit breakers.
Preferably, the 220KV prefabricated cabin unit, the 110KV prefabricated cabin unit and the secondary equipment room unit are respectively provided with a distributed direct-current power supply system, and the nominal voltage of the direct-current power supply system is 220V.
Preferably, the voltage of the single storage battery module is 12V, the capacity of the single storage battery module is 150Ah, and the single storage battery module is a lead-acid storage battery.
Compared with the prior art, the invention has the beneficial effects that:
the substation direct-current bus type distributed parallel direct-current power supply system with the prefabricated cabin opens up a brand new direct-current system by the application of a parallel intelligent power supply system, the system can automatically realize on-line capacity check maintenance on battery packs and realize life cycle management, has good effect in practical application, can greatly prolong the service life of storage batteries and improve the utilization rate of old storage batteries, greatly improves the safety performance of the direct-current storage system in the whole substation power system, can continue basic operation of a substation even if one or more groups of direct-current storage battery systems are damaged or failed, avoids the terminal of work of the substation from influencing use, and cannot influence the normal work of other groups of storage battery systems and the work of the whole substation system when one or more groups of storage battery modules are damaged, the safety and the stability of the whole transformer substation system are greatly improved.
Drawings
FIG. 1 is a schematic diagram of a circuit structure of a prefabricated cabin unit according to the present invention;
FIG. 2 is a schematic diagram of a parallel battery module circuit configuration according to the present invention;
FIG. 3 is a schematic circuit diagram of a high frequency switch module according to the present invention;
FIG. 4 is a flow chart of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides a technical solution: a transformer substation direct current bus type distributed parallel direct current power supply system with a prefabricated cabin comprises a transformer substation power supply unit, a 220KV prefabricated cabin unit, a 110KV prefabricated cabin unit and a secondary equipment room unit, wherein the 220KV prefabricated cabin unit and the 110KV prefabricated cabin unit are electrically connected with the transformer substation power supply unit, the 220KV prefabricated cabin unit and the 110KV prefabricated cabin unit are respectively electrically connected with the secondary equipment room unit, the 220KV prefabricated cabin unit and the 110KV prefabricated cabin unit respectively comprise a parallel storage battery module and a high-frequency switch module, the input end of the high-frequency switch module is electrically connected with the output end of the transformer substation power supply unit, the input end of the parallel storage battery module is electrically connected with the output end of the high-frequency switch module, a brand new direct current system is developed by the application of the parallel intelligent power supply system, the system can automatically realize on-line nuclear capacity maintenance of a battery pack, in practical application, the system has a good effect, can greatly prolong the service life of the storage batteries and improve the utilization rate of the old storage batteries, so that the safety performance of the direct-current storage system in the power system of the whole transformer substation is greatly improved, even if one or more groups of direct-current storage battery systems are damaged or failed, the basic operation of the transformer substation can be continued, the terminal of the working of the transformer substation is avoided, the use is influenced, meanwhile, when one or more groups of storage battery modules are damaged, the normal working of the other groups of storage battery systems and the working of the whole transformer substation system are not influenced, the safety and the stability of the whole transformer substation system are greatly improved, the parallel direct-current bus sections of the secondary equipment room unit are linked with the direct-current bus sections of the 220KV prefabricated cabin unit and the 110KV prefabricated cabin unit through bus connection, the high-frequency switch module comprises a first group of output channels, a second group of output channels and a third group of output channels, the first group of output channels, the second group of output channels and the third group of output channels are electrically connected with the output end of the power supply unit of the transformer substation through bus bars, the first group of output channels, the second group of output channels and the third group of output channels are in parallel connection, the first group of output channels, the second group of output channels and the third group of output channels are electrically connected with the bus bars of the parallel storage battery module, the first group of output channels comprise channels 1 and 2, the second group of output channels comprise channels 3 and 4, the third group of output channels comprise channels 5 and 6, the channels 1 and 1, the channels 3 and 4, the channels 5 and 6 are electrically connected through circuit breakers, and the channels 1, 4 and 6 are electrically connected with the bus bars of the parallel storage battery module through contactors and conducting wires, the parallel storage battery module comprises a first battery pack, a second battery pack and a third battery pack, wherein the input ends of the first battery pack, the second battery pack and the third battery pack are electrically connected with a bus section through leads and circuit breakers, the output ends of the first battery pack, the second battery pack and the third battery pack are electrically connected with direct current bus sections of the 220KV prefabricated cabin unit and the 110KV prefabricated cabin unit through leads and circuit breakers, the 220KV prefabricated cabin unit, the 110KV prefabricated cabin unit and the secondary equipment room unit respectively adopt a distributed direct current power supply system, the nominal voltage of the direct current power supply system adopts 220V, the voltage of a single storage battery module is 12V, the capacity of the single storage battery module is 150Ah, and the storage battery module is a lead-acid storage battery.
To sum up, the substation direct current bus type distributed parallel direct current power supply system with the prefabricated cabin opens up a brand new direct current system through the application of the parallel intelligent power supply system, the system can automatically realize on-line capacity check maintenance on the battery pack and realize life cycle management, and can generate very good effect in practical application, greatly prolong the service life of the storage battery and improve the utilization rate of the old storage battery, so that the safety performance of the direct current storage system in the whole substation power system is greatly improved, therefore, even if one or more groups of direct current storage battery systems are damaged or failed, the basic operation of the substation can be continued, the terminal of the substation work is avoided, the use is influenced, and meanwhile, when one or more groups of storage battery modules are damaged, the normal work of the other groups of storage battery systems and the work of the whole substation system are not influenced, the safety and the stability of the whole transformer substation system are greatly improved.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a take transformer substation's direct current bus type distributed parallel connection direct current electrical power generating system of prefabricated cabin, includes transformer substation's power supply unit, 220KV prefabricated cabin unit, 110KV prefabricated cabin unit and secondary equipment room unit, its characterized in that: the 220KV prefabricated cabin unit and the 110KV prefabricated cabin unit are both electrically connected with a power supply unit of a transformer substation, and the 220KV prefabricated cabin unit and the 110KV prefabricated cabin unit are respectively electrically connected with the secondary equipment room unit;
the 220KV prefabricated cabin unit and the 110KV prefabricated cabin unit respectively comprise a parallel storage battery module and a high-frequency switch module, the input end of the high-frequency switch module is electrically connected with the output end of the power supply unit of the transformer substation, and the input end of the parallel storage battery module is electrically connected with the output end of the high-frequency switch module.
2. The substation direct-current bus type distributed parallel direct-current power supply system with the prefabricated cabin according to claim 1, characterized in that: and the parallel direct current bus section of the secondary equipment room unit is linked with the direct current bus sections of the 220KV prefabricated cabin unit and the 110KV prefabricated cabin unit through a bus connection.
3. The substation direct-current bus type distributed parallel direct-current power supply system with the prefabricated cabin according to claim 1, characterized in that: the high-frequency switch module comprises a first group of output channels, a second group of output channels and a third group of output channels, the first group of output channels, the second group of output channels and the third group of output channels are electrically connected with the output end of the power supply unit of the transformer substation through bus sections, the first group of output channels, the second group of output channels and the third group of output channels are in parallel connection, and the first group of output channels, the second group of output channels and the third group of output channels are electrically connected with the bus sections of the parallel storage battery modules.
4. The substation direct-current bus type distributed parallel direct-current power supply system with the prefabricated cabin according to claim 3, characterized in that: the first set of output channels includes channel 1 and channel 2, the second set of output channels includes channel 3 and channel 4, and the third set of output channels includes channel 5 and channel 6.
5. The substation direct-current bus type distributed parallel direct-current power supply system with the prefabricated cabin according to claim 4, characterized in that: the channels 1 and 3, 4 and 5 and 6 are all electrically connected through circuit breakers, and the channels 1, 4 and 6 are all electrically connected with the bus sections of the parallel battery modules through contactors and wires.
6. The substation direct-current bus type distributed parallel direct-current power supply system with the prefabricated cabin according to claim 1, characterized in that: the parallel storage battery module comprises a first battery pack, a second battery pack and a third battery pack, wherein the input ends of the first battery pack, the second battery pack and the third battery pack are electrically connected with the bus section through leads and circuit breakers, and the output ends of the first battery pack, the second battery pack and the third battery pack are electrically connected with the direct current bus sections of the 220KV prefabricated cabin unit and the 110KV prefabricated cabin unit through leads and circuit breakers.
7. The substation direct-current bus type distributed parallel direct-current power supply system with the prefabricated cabin according to claim 1, characterized in that: the 220KV prefabricated cabin unit, the 110KV prefabricated cabin unit and the secondary equipment room unit are respectively provided with a distributed direct-current power supply system, and the nominal voltage of the direct-current power supply system is 220V.
8. The substation direct-current bus type distributed parallel direct-current power supply system with the prefabricated cabin according to claim 1, characterized in that: the voltage of the single storage battery module is 12V, the capacity of the single storage battery module is 150Ah, and the storage battery module is a lead-acid storage battery.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011365451.7A CN112787394A (en) | 2020-11-28 | 2020-11-28 | Transformer substation direct current bus type distributed parallel direct current power supply system with prefabricated cabin |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011365451.7A CN112787394A (en) | 2020-11-28 | 2020-11-28 | Transformer substation direct current bus type distributed parallel direct current power supply system with prefabricated cabin |
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