CN112688420A - AC/DC power supply topological structure suitable for all-in-one station - Google Patents
AC/DC power supply topological structure suitable for all-in-one station Download PDFInfo
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Abstract
本发明提供一种适用多合一变电站的交直流供电拓扑结构，包含：两台站用变；若干个第一AC/DC模块，连接设置在站用交流、直流母线之间，站用交流、直流母线分别设有第一分段开关FD1、第二分段开关FD2；静态转换开关STS、自动转换开关ATS1～ATS4、若干个DC/DC模块；若干个V2G充电桩，分别连接FD2两侧的站用直流母线；若干个5G基站，分别连接FD2两侧的站用直流母线；若干个储能电池，通过对应的DC/DC模块分别连接FD2两侧的站用直流母线；数据中心，数据中心的交流负荷通过ATS4连接FD1两侧的站用交流母线；数据中心的直流负荷通过静态转换开关STS连接FD2两侧的站用直流母线。
The invention provides an AC-DC power supply topology structure suitable for an all-in-one substation, comprising: two substations; The DC bus is respectively provided with a first segment switch FD1 and a second segment switch FD2; a static transfer switch STS, automatic transfer switches ATS1-ATS4, several DC/DC modules; several V2G charging piles, respectively connected to the two sides of the FD2. Station DC bus; several 5G base stations, respectively connected to the station DC bus on both sides of the FD2; several energy storage batteries, respectively connected to the station DC bus on both sides of the FD2 through the corresponding DC/DC modules; data center, data center The AC load of the data center is connected to the station AC busbars on both sides of FD1 through ATS4; the DC load of the data center is connected to the station DC busbars on both sides of FD2 through the static transfer switch STS.
Description
Technical Field
The invention relates to the technical field of transformer substations, in particular to an alternating current-direct current power supply topological structure suitable for an all-in-one station.
Background
The large city has high power load, the distribution of the transformer substation is more and wide, the power supply radius is small, the peak load is obvious, and the large city goes deep into the user side; meanwhile, urban land resources are in shortage, government carbon emission indexes are strict, and governments strictly control the construction of data centers with more than scale and have vigorous demand on the data centers; the electric automobile has high holding capacity, is rapidly increased, and has vigorous charging demand. At present, how to utilize power grid plant station facilities to build core hub nodes of an energy internet, and realize three-in-one of energy source flow, data flow and service flow and multi-station fusion of a transformer substation, a data center station, an energy storage station, a charging station and the like still face the following three problems at present: the system of 'multi-station integration' planning, design and operation is not formed yet; the integration, function multiplexing and information integration of production elements of multi-station fusion lack standards, and the fusion degree still has a great space for improvement; the strategy of supporting the operation of the power grid by multi-station integration is not complete.
Along with the continuous promotion of alternating current-direct current power supply technique, through the power characteristics of combing the station of unifying more, load capacity, load characteristic, the characteristics of considering newly-built station and transformation station are put into general to the transformation station power consumption power supply topology of traditional transformer substation, form one kind and adapt to polymorphic type station, the alternating current-direct current supply network topology of many input and output realizes website resource make full use of, promotes the electric wire netting comprehensive efficiency benefit, satisfies the urban construction and to the comprehensive requirement of energy, environment.
The current situation in foreign countries: in recent years, western countries represented by the united states have great investment in the construction of large-scale renewable energy and battery energy storage power stations, alternating current and direct current hybrid power stations with different composition forms are established, the application covers the fields of power generation, auxiliary service, power transmission and distribution, user sides, distributed power generation and microgrid, large-scale renewable energy grid connection and the like, the functions and the functions of different alternating current and direct current hybrid power stations are classified and defined, and guidance is provided for the development of large-scale alternating current and direct current hybrid power stations. More foreign countries focus on the power supply system integration technology research of single power stations such as transformer substations, charging and discharging stations and the like.
The current situation in China: at present, researches on multi-station fusion construction and combined operation are deficient at home and abroad, researches and application on an alternating current and direct current hybrid power station are started late, but related key technologies are rapidly developed and valued along with adjustment and optimization of an energy structure, transformer substation + energy storage and other successful cases are seen at home, but a power supply system is designed in a mode that the transformer substation is only connected with other systems in a power supply mode, and a case that a unified technical scheme is adopted to realize fusion of the power supply fusion system is not seen.
Disclosure of Invention
The invention aims to provide an alternating current-direct current power supply topological structure suitable for an all-in-one station, which can meet the energy flow fusion energy supply requirements of a transformer substation, a data center and an energy storage station, maximally utilize related resources, reduce equipment investment and waste of land resources, and realize that the traditional transformer substation is transforming to a multifunctional comprehensive energy station comprising the energy storage station, the transformer substation, the data center and the like.
In order to achieve the above object, the present invention provides an ac/dc power supply topology structure suitable for an all-in-one substation, which is used for a newly-built substation, and comprises:
two stations are used, and the connection station is connected with an alternating current bus;
the plurality of first AC/DC modules are connected and arranged between the station AC bus and the station DC bus, and the station AC bus and the station DC bus are respectively provided with a first section switch FD1 and a second section switch FD 2; the two station transformers are respectively connected with station alternating current buses on two sides of the first section switch FD 1;
the system comprises a static transfer switch STS, automatic transfer switches ATS 1-ATS 4 and a plurality of DC/DC modules;
the plurality of V2G charging piles are respectively connected with station direct current buses at two sides of the second section switch FD 2;
the 5G base stations are respectively connected with station direct current buses at two sides of the second section switch FD 2;
the plurality of energy storage batteries are respectively connected with the station direct current buses at two sides of the second section switch FD2 through corresponding DC/DC modules, and different energy storage batteries correspond to different DC/DC modules;
the AC load of the data center is connected with the AC buses for stations at two sides of the first section switch FD1 through ATS 4; the dc loads of the data center are connected to the station dc bus lines on both sides of the second section switch FD2 via the static transfer switch STS.
Preferably, the ac/dc power supply topology structure suitable for the all-in-one substation further includes:
a plurality of lighting loads, a plurality of air conditioning loads, and a plurality of monitoring loads; the lighting load, the air conditioning load and the monitoring load are connected with station alternating current buses on two sides of the first section switch FD1 through an automatic transfer switch ATS 1;
the control protection loads are sequentially connected with station direct current buses at two sides of the second section switch FD2 through a DC/DC module and an automatic transfer switch ATS2, and the control protection loads correspond to the same DC/DC module;
and the communication loads are sequentially connected with station direct current buses at two sides of the second section switch FD2 through a DC/DC module and an automatic transfer switch ATS3, and correspond to the same DC/DC module.
Preferably, the alternating current/direct current power supply topological structure applicable to the all-in-one substation further comprises a UPS unit; the UPS unit includes a second AC/DC module, a DC/AC module, and a bypass module;
the data center also includes a first power distribution unit PDU1, a second power distribution unit PDU 2;
the first end of the second AC/DC module is connected with station alternating current buses on two sides of the first section switch FD1 through an automatic transfer switch ATS 4; the second end of the second AC/DC module is connected with the first end of the DC/AC module, and the second end of the DC/AC module is connected with an alternating current load of the data center through a first power distribution unit PDU 1; the second end of the second AC/DC module and the first end of the DC/AC module are connected with station direct current buses at two sides of the second section switch FD2 through a static transfer switch STS; the direct current load of the data center is connected with station direct current buses at two sides of the second section switch FD2 through a second power distribution unit PDU2 and a static transfer switch STS in sequence;
and two ends of the bypass module are respectively connected with the first end of the second AC/DC module and the second end of the DC/AC module.
Preferably, the ac/dc power supply topology structure suitable for the all-in-one substation further includes:
the system comprises a plurality of off-station alternating current power supply interfaces for supplying power to off-station alternating current loads, wherein the off-station alternating current power supply interfaces are connected with station alternating current buses on the first side or the second side of a first section switch FD 1;
and the plurality of off-station direct current power supply interfaces are used for supplying power to off-station direct current loads, and the off-station direct current power supply interfaces are connected with station direct current buses on the first side or the second side of the second section switch FD 2.
The invention also provides an alternating current-direct current power supply topological structure suitable for the all-in-one transformer substation, which is used for transforming the traditional transformer substation and comprises the following components:
a legacy substation, the legacy substation comprising: the system comprises a first station transformer, a second station transformer and a plurality of first AC/DC modules; the station alternating current bus is provided with a first section switch FD1, and the station direct current bus is provided with a second section switch FD 2; the first station transformer and the second station transformer are respectively positioned at two sides of the first section switch FD 1; the first AC/DC module is connected and arranged between the station alternating current bus and the station direct current bus;
the station transformer substation comprises a first box transformer substation and a second box transformer substation, wherein the first/second box transformer substation and a first/second station transformer substation are connected with an alternating current bus for the station after being combined;
the plurality of V2G charging piles are respectively connected with station direct current buses at two sides of the second section switch FD 2;
the 5G base stations are respectively connected with station direct current buses at two sides of the second section switch FD 2;
the plurality of energy storage batteries are respectively connected with the station direct current buses at two sides of the second section switch FD2 through corresponding DC/DC modules, and different energy storage batteries correspond to different DC/DC modules;
a static transfer switch STS and a plurality of automatic transfer switches ATS;
the AC load of the data center is connected with the station AC buses on two sides of the first section switch FD1 through the corresponding automatic transfer switch ATS; the dc loads of the data center are connected to the station dc bus lines on both sides of the second section switch FD2 via the static transfer switch STS.
Preferably, the conventional substation further comprises: the system comprises a plurality of first alternating current loads, a plurality of second alternating current loads, a plurality of direct current loads, a storage battery and a second AC/DC module;
the first side of the second AC/DC module is connected with the station alternating current bus at two sides of the first section switch FD1, and the second side of the second AC/DC module is connected with the station alternating current bus;
the direct current buses are used for the direct current load and storage battery connection stations;
the first alternating current load is connected with a station alternating current bus on the first side or the second side of the first section switch FD 1;
the second alternating current loads are connected with the station alternating current buses on two sides of the first section switch FD1 through the corresponding automatic transfer switches ATS, and different second alternating current loads correspond to different automatic transfer switches ATS.
Preferably, the ac/dc power supply topology structure suitable for the all-in-one substation further includes:
the system comprises a plurality of off-station alternating current power supply interfaces for supplying power to off-station alternating current loads, wherein the off-station alternating current power supply interfaces are connected with station alternating current buses on the first side or the second side of a first section switch FD 1;
the system comprises a plurality of off-station direct current power supply interfaces for supplying power to off-station direct current loads, wherein the off-station direct current power supply interfaces are connected with station direct current buses on the first side or the second side of a second section switch FD 2;
a plurality of newly-added first alternating current loads which are connected with station alternating current buses on the first side or the second side of the first section switch FD 1;
the new second alternating current loads are connected with the station alternating current buses on two sides of the first section switch FD1 through corresponding automatic transfer switches ATS, and different new second alternating current loads correspond to different automatic transfer switches ATS;
the plurality of control protection direct current loads are connected with the direct current bus for the station.
Preferably, the ac/dc power supply topology structure suitable for the all-in-one substation further includes a UPS module;
the data center also includes a first power distribution unit PDU1, a second power distribution unit PDU 2;
the UPS module includes: a third AC/DC module, a DC/AC module, a bypass module;
the first end of the third AC/DC module is connected with the station alternating current buses on two sides of the first section switch FD1 through an automatic transfer switch ATS corresponding to the data center; the second end of the third AC/DC module is connected with the first end of the DC/AC module, and the second end of the DC/AC module is connected with an alternating current load of the data center through a first power distribution unit PDU 1; the second end of the third AC/DC module and the first end of the DC/AC module are connected with station direct current buses at two sides of the second section switch FD2 through a static transfer switch STS; the direct current load of the data center is connected with station direct current buses at two sides of the second section switch FD2 through a second power distribution unit PDU2 and a static transfer switch STS in sequence;
and two ends of the bypass module are respectively connected with the first end of the third AC/DC module and the second end of the DC/AC module.
Compared with the prior art, the invention has the beneficial effects that:
1) the AC/DC power supply topological structure can meet the energy flow fusion energy supply requirements of a transformer substation, a data center and an energy storage station, realizes the maximum utilization of related resources, reduces the equipment investment and the waste of land resources, and realizes the transformation of the traditional transformer substation to a multifunctional comprehensive energy station comprising the energy storage station, the transformer substation, the data center and the like;
2) the invention comprehensively considers the existing different power supply system architectures, the power quality and the high reliability requirements of the data center station, the energy storage power station and the charging station, the functional requirements of the power grid side/power generation side energy storage power station and the working voltage type of the AC/DC charging pile.
2) The invention researches the requirement of the UPS on the battery, the adaptability scheme of the UPS and the direct current bus of the energy storage battery and the reliability and feasibility of the energy storage battery as the UPS direct current power supply. The new station building energy storage power station uses a high-capacity energy storage lithium battery, divides partial battery capacity for the UPS, does not separately set up a lead-acid battery, reduces project investment, saves the occupied area of the UPS and enables energy utilization to be more sufficient. Meanwhile, the energy storage lithium battery can play a role in leveling the peak and filling the valley for the electric energy of the energy storage power station, and the stability and safety of power supply are guaranteed.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description will be briefly introduced, and it is obvious that the drawings in the following description are an embodiment of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts according to the drawings:
FIG. 1 is a schematic diagram of an AC/DC power supply topological structure for a newly-built substation according to the invention;
fig. 2 is a schematic diagram of an ac/dc power supply topology for transforming a conventional substation according to the present invention;
FIG. 3 is a schematic diagram of a data center, a UPS module, a station AC bus and a station DC bus in a topology structure for a newly-built substation according to the present invention;
FIG. 4 is a schematic diagram of the integration of an energy storage battery with AC and DC buses and UPS modules for a newly-built substation in the topological structure of the present invention;
FIG. 5 is a schematic diagram of a topology for transforming a conventional power station according to the present invention, in which a data center and UPS modules are connected to a station AC bus and a station DC bus;
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.
As shown in fig. 1, 3, and 4, the present invention provides an ac/dc power supply topology structure suitable for an all-in-one substation, which is used for a newly-built substation, and includes: the station is with changing two stations, a plurality of first AC/DC module, static transfer switch STS, automatic transfer switch ATS1 ~ ATS4, a plurality of DC/DC module, a plurality of V2G fills electric pile, a plurality of 5G basic station, a plurality of energy storage battery, data center, a plurality of lighting load, a plurality of air conditioner load, a plurality of control load, the UPS unit, a plurality of off-station alternating current power supply interface, a plurality of off-station direct current power supply interface.
The two stations are used as transformers, and the connection stations are connected by alternating current buses; the voltage of the two station transformer is 400V, the voltage of the station AC bus is 380V, and in order to ensure that the voltage at the tail end of the station AC bus is not too low, the station transformer voltage is slightly higher than the station AC bus voltage. The DC bus voltage for the station is + -375V.
The first AC/DC modules are connected between the station AC bus and the station DC bus, and the AC power of the station AC bus is the DC power of the station DC bus. The station alternating current bus and the station direct current bus are respectively provided with a first section switch FD1 and a second section switch FD 2; the two station transformers are connected to the station ac busbars on both sides of the first section switch FD1, respectively.
The V2G (Vehicle-to-grid) charging piles are respectively connected with station direct current buses at two sides of the second section switch FD 2; the electric automobile obtains first direct current electric energy through V2G fills electric pile.
The 5G base stations are respectively connected with station direct current buses at two sides of the second section switch FD 2; and providing working electric energy for the 5G base station by using a direct current bus for the station.
The plurality of energy storage batteries are respectively connected with the station direct current buses at two sides of the second section switch FD2 through corresponding DC/DC modules, and different energy storage batteries correspond to different DC/DC modules. In the embodiment of the invention, the energy storage battery is a lithium battery, and the direct current electric energy stored by the lithium battery is provided by a direct current bus for a lithium battery storage station or the station direct current bus.
As shown in fig. 1, the lighting load, the air conditioning load, and the monitoring load are connected to the station ac bus lines on both sides of the first section switch FD1 through an automatic transfer switch ATS 1;
the control protection loads are sequentially connected with station direct current buses at two sides of the second section switch FD2 through a DC/DC module and an automatic transfer switch ATS2, and the control protection loads correspond to the same DC/DC module;
and the communication loads are sequentially connected with station direct current buses at two sides of the second section switch FD2 through a DC/DC module and an automatic transfer switch ATS3, and correspond to the same DC/DC module.
As shown in fig. 1, the off-site ac power supply interface is used for supplying power to an off-site ac load, and is connected to a station ac bus on a first side or a second side of the first section switch FD 1;
the station external AC power supply interface is used for supplying power to an external DC load and is connected with a station DC bus on the first side or the second side of the second section switch FD 2.
As shown in fig. 3 and 4, the data center includes a first Power Distribution Unit PDU1(Power Distribution Unit), a second Power Distribution Unit PDU2, an ac load of the data center, and a dc load of the data center. The UPS unit includes a second AC/DC module, a DC/AC module, and a bypass module, a service bypass.
The first end of the second AC/DC module is connected with station alternating current buses on two sides of the first section switch FD1 through an automatic transfer switch ATS 4; the second end of the second AC/DC module is connected with the first end of the DC/AC module, and the second end of the DC/AC module is connected with an alternating current load of the data center through a first power distribution unit PDU 1; the second end of the second AC/DC module and the first end of the DC/AC module are connected with station direct current buses at two sides of the second section switch FD2 through a static transfer switch STS; the direct current load of the data center is connected with station direct current buses at two sides of the second section switch FD2 through a second power distribution unit PDU2 and a static transfer switch STS in sequence; the two ends of the bypass module and the two ends of the maintenance bypass are respectively connected with the first end of the second AC/DC module and the second end of the DC/AC module.
The configuration of the power supply guarantee mode of the data center, which is one of important and special loads of the all-in-one station, must meet the requirements of GB50052-2009 and also must meet the definition and clause requirements of GB 50174-2008. According to the standard requirement, the power supply of the data center is divided into a commercial power distribution power supply part and a UPS power supply part. The commercial power distribution is mainly used for supplying precise air conditioning equipment for a machine room, common illumination and air supply and exhaust, socket maintenance, general power, UPS equipment and the like. The commercial power distribution adopts a 50Hz alternating current power supply, 380/220V three-phase power supply.
The data center adopts a dual-path power supply of alternating current 380/220V (normal supply) and direct current +/-375V (backup) which are changed and belong to different stations respectively, and when two stations change to be in failure simultaneously or one station changes to be in failure simultaneously with a subordinate energy storage unit, seamless switching can be realized without power failure. The power supply capacity of each path of commercial power supply can meet the requirements of all primary and secondary loads, including primary and secondary loads in a UPS (uninterrupted power supply) system, a machine room precision air conditioner, machine room illumination, storage battery charging and building equipment. The power supply capacity of the two commercial power supplies is fully redundant, the two commercial power supplies are normally powered and operated simultaneously, and the two commercial power supplies are automatically switched at the input end of the load equipment.
The UPS power distribution is mainly used for computer equipment, servers, small-sized machines, storage, network equipment, security monitoring equipment and the like. The station-level UPS power supply is built by using the energy storage battery, so that the power supply reliability is obviously improved. The data center adopts a dual redundancy mode to supply power, a station uses a direct current double bus (buses on two sides of a section switch FS 2) as a standby power supply and is connected to the data center through a static transfer switch STS, and the STS transfer time is less than 5 ms.
As shown in fig. 4, the energy storage battery is integrated into the transformer substation, and the purpose is to use the high-capacity energy storage lithium battery of the energy storage power station, divide part of the battery capacity for the UPS, and no lead-acid battery is set up separately, thereby reducing the project investment, saving the occupied area of the UPS, and making the energy utilization more sufficient. According to the principle of economic priority, the functions of the energy storage power station are positioned for shifting peaks and filling valleys of a data center and a transformer substation, and simultaneously, the UPS battery is replaced.
The energy storage battery is fused with the power station as shown in fig. 4. When the station is in normal operation, the alternating current energy of the alternating current bus for the station is divided into two parts, and one part of the alternating current energy passes through the first AC/DC module to supply power to each load (5G base station and the like) connected with the direct current bus for the station; and the other path of the direct current bus enters the energy storage battery through the station and is used for supplementing the loss generated by self-generation of the energy storage power station. When the mains supply fails, the direct current electric energy of the energy storage battery supplies power to an alternating current load of the data center or directly supplies power to a direct current load of the data center after passing through the DC/AC of the inverter. The energy storage battery can play a role in shifting peaks and filling valleys. In the electricity consumption valley period, the station charges an energy storage battery of the energy storage power station through a first AC/DC module by using a direct current bus; during peak hours, the energy storage battery of the energy storage power station discharges to the station AC bus via the first AC/DC. The energy storage power station ensures the 30min standby power capacity of the data center at any time, and the residual capacity is used for shifting peaks and filling valleys to the transformer substation and the data center.
When the UPS unit works normally, power is supplied by an 380/220 station through an alternating current bus, power is supplied to an alternating current load of the data center through a second AC/DC and a DC/AC, and power is supplied to a direct current load of the data center through the second AC/DC. When the UPS inversion component DC/AC fails, the power supply is automatically switched to the UPS bypass module for power supply, and the load is ensured not to lose power. And when the second AC/DC module, the DC/AC module and the bypass module of the UPS unit need to be overhauled, supplying power to the data center through the maintenance bypass.
The invention also provides an ac/dc power supply topological structure suitable for the all-in-one transformer substation, which is used for transforming the traditional transformer substation, and as shown in fig. 2, the ac/dc power supply topological structure comprises: traditional transformer substation, first case become with the second case becomes, a plurality of V2G fills electric pile, a plurality of 5G basic station, a plurality of energy storage battery, static transfer switch STS and a plurality of automatic transfer switch ATS, a plurality of off-station AC supply interface of data center, a plurality of off-station DC supply interface, a plurality of first AC load that newly increases, a plurality of second AC load that newly increases, a plurality of control protection DC load, the UPS module.
As shown in fig. 2, the conventional substation includes: the system comprises a transformer for a first station, a transformer for a second station, a plurality of first AC/DC modules, a second AC/DC module, a plurality of first AC loads, a plurality of second AC loads, a plurality of DC loads and a storage battery. The station AC bus is provided with a first section switch FD1, the station DC bus is provided with a second section switch FD2, the first station transformer and the second station transformer are respectively positioned at two sides of the first section switch FD1, and the first AC/DC module is connected and arranged between the station AC bus and the station DC bus. In an embodiment of the invention, the storage battery is a lead-acid battery.
The first side of the second AC/DC module is connected to the station AC bus on both sides of the first section switch FD1, and the second side of the second AC/DC module is connected to the station AC bus.
And the plurality of direct current loads and the storage battery are connected with the direct current bus for the station.
The first ac load is connected to the station ac bus on the first side or the second side of the first section switch FD 1.
The second alternating current loads are connected with the station alternating current buses on two sides of the first section switch FD1 through the corresponding automatic transfer switches ATS, and different second alternating current loads correspond to different automatic transfer switches ATS.
The first/second box transformer substation and the first/second station transformer substation are connected with the station alternating current bus in parallel; the first/second box transformer substation is used as standby equipment of the first/second station transformer substation.
The plurality of V2G charging piles are respectively connected with station direct current buses at two sides of the second section switch FD 2; the electric automobile obtains first direct current energy through the V2G charging pile;
the plurality of 5G base stations are respectively connected with station direct current buses at two sides of the second section switch FD 2; providing working electric energy for the 5G base station through a DC bus for the station;
the plurality of energy storage batteries are respectively connected with the station direct current buses at two sides of the second section switch FD2 through corresponding DC/DC modules, and in the embodiment of the invention, the energy storage batteries are lithium batteries.
The station external alternating current power supply interface is used for supplying power to an external alternating current load and is connected with a station alternating current bus on the first side or the second side of the first section switch FD 1;
the station external AC power supply interface is used for supplying power to an external DC load and is connected with a station DC bus on the first side or the second side of the second section switch FD 2;
the newly added first alternating current load is connected with a station alternating current bus on the first side or the second side of the first section switch FD 1;
the newly added second alternating current loads are connected with the station alternating current buses on two sides of the first section switch FD1 through the corresponding automatic transfer switches ATS, and different newly added second alternating current loads correspond to different automatic transfer switches ATS;
the control protects the DC load and connects the DC bus for the station.
As shown in fig. 5, the data center includes a first Power Distribution Unit PDU1(Power Distribution Unit), a second Power Distribution Unit PDU2, an ac load of the data center, and a dc load of the data center. The UPS unit includes a third AC/DC module, a DC/AC module, and a bypass module, a service bypass.
The first end of the third AC/DC module is connected with station alternating current buses on two sides of the first section switch FD1 through an automatic transfer switch ATS 4; the second end of the third AC/DC module is connected with the first end of the DC/AC module, and the second end of the DC/AC module is connected with an alternating current load of the data center through a first power distribution unit PDU 1; the second end of the third AC/DC module and the first end of the DC/AC module are connected with station direct current buses at two sides of the second section switch FD2 through a static transfer switch STS; the direct current load of the data center is connected with station direct current buses at two sides of the second section switch FD2 through a second power distribution unit PDU2 and a static transfer switch STS in sequence; and two ends of the bypass module and the maintenance bypass are respectively connected with the first end of the third AC/DC module and the second end of the DC/AC module.
While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. The utility model provides an alternating current-direct current power supply topological structure who is suitable for all-in-one transformer substation for newly-built transformer substation, its characterized in that contains:
two stations are used, and the connection station is connected with an alternating current bus;
the plurality of first AC/DC modules are connected and arranged between the station AC bus and the station DC bus, and the station AC bus and the station DC bus are respectively provided with a first section switch FD1 and a second section switch FD 2; the two station transformers are respectively connected with station alternating current buses on two sides of the first section switch FD 1;
the system comprises a static transfer switch STS, automatic transfer switches ATS 1-ATS 4 and a plurality of DC/DC modules;
the plurality of V2G charging piles are respectively connected with station direct current buses at two sides of the second section switch FD 2;
the 5G base stations are respectively connected with station direct current buses at two sides of the second section switch FD 2;
the plurality of energy storage batteries are respectively connected with the station direct current buses at two sides of the second section switch FD2 through corresponding DC/DC modules, and different energy storage batteries correspond to different DC/DC modules;
the AC load of the data center is connected with the AC buses for stations at two sides of the first section switch FD1 through ATS 4; the dc loads of the data center are connected to the station dc bus lines on both sides of the second section switch FD2 via the static transfer switch STS.
2. The ac-dc power supply topology structure suitable for all-in-one substation of claim 1, further comprising:
a plurality of lighting loads, a plurality of air conditioning loads, and a plurality of monitoring loads; the lighting load, the air conditioning load and the monitoring load are connected with station alternating current buses on two sides of the first section switch FD1 through an automatic transfer switch ATS 1;
the control protection loads are sequentially connected with station direct current buses at two sides of the second section switch FD2 through a DC/DC module and an automatic transfer switch ATS2, and the control protection loads correspond to the same DC/DC module;
and the communication loads are sequentially connected with station direct current buses at two sides of the second section switch FD2 through a DC/DC module and an automatic transfer switch ATS3, and correspond to the same DC/DC module.
3. The ac-dc power supply topology structure suitable for an all-in-one substation according to claim 1, further comprising a UPS unit; the UPS unit includes a second AC/DC module, a DC/AC module, and a bypass module;
the data center also includes a first power distribution unit PDU1, a second power distribution unit PDU 2;
the first end of the second AC/DC module is connected with station alternating current buses on two sides of the first section switch FD1 through an automatic transfer switch ATS 4; the second end of the second AC/DC module is connected with the first end of the DC/AC module, and the second end of the DC/AC module is connected with an alternating current load of the data center through a first power distribution unit PDU 1; the second end of the second AC/DC module and the first end of the DC/AC module are connected with station direct current buses at two sides of the second section switch FD2 through a static transfer switch STS; the direct current load of the data center is connected with station direct current buses at two sides of the second section switch FD2 through a second power distribution unit PDU2 and a static transfer switch STS in sequence;
and two ends of the bypass module are respectively connected with the first end of the second AC/DC module and the second end of the DC/AC module.
4. The ac-dc power supply topology structure suitable for all-in-one substation of claim 1, further comprising:
the system comprises a plurality of off-station alternating current power supply interfaces for supplying power to off-station alternating current loads, wherein the off-station alternating current power supply interfaces are connected with station alternating current buses on the first side or the second side of a first section switch FD 1;
and the plurality of off-station direct current power supply interfaces are used for supplying power to off-station direct current loads, and the off-station direct current power supply interfaces are connected with station direct current buses on the first side or the second side of the second section switch FD 2.
5. The utility model provides an alternating current-direct current power supply topological structure who is suitable for unification transformer substation for reform transform traditional transformer substation, its characterized in that contains:
a legacy substation, the legacy substation comprising: the system comprises a first station transformer, a second station transformer and a plurality of first AC/DC modules; the station alternating current bus is provided with a first section switch FD1, and the station direct current bus is provided with a second section switch FD 2; the first station transformer and the second station transformer are respectively positioned at two sides of the first section switch FD 1; the first AC/DC module is connected and arranged between the station alternating current bus and the station direct current bus;
the station transformer substation comprises a first box transformer substation and a second box transformer substation, wherein the first/second box transformer substation and a first/second station transformer substation are connected with an alternating current bus for the station after being combined;
the plurality of V2G charging piles are respectively connected with station direct current buses at two sides of the second section switch FD 2;
the 5G base stations are respectively connected with station direct current buses at two sides of the second section switch FD 2;
the plurality of energy storage batteries are respectively connected with the station direct current buses at two sides of the second section switch FD2 through corresponding DC/DC modules, and different energy storage batteries correspond to different DC/DC modules;
a static transfer switch STS and a plurality of automatic transfer switches ATS;
the AC load of the data center is connected with the station AC buses on two sides of the first section switch FD1 through the corresponding automatic transfer switch ATS; the dc loads of the data center are connected to the station dc bus lines on both sides of the second section switch FD2 via the static transfer switch STS.
6. The ac-dc power supply topology structure suitable for all-in-one substation of claim 5, wherein the conventional substation further comprises: the system comprises a plurality of first alternating current loads, a plurality of second alternating current loads, a plurality of direct current loads, a storage battery and a second AC/DC module;
the first side of the second AC/DC module is connected with the station alternating current bus at two sides of the first section switch FD1, and the second side of the second AC/DC module is connected with the station alternating current bus;
the direct current buses are used for the direct current load and storage battery connection stations;
the first alternating current load is connected with a station alternating current bus on the first side or the second side of the first section switch FD 1;
the second alternating current loads are connected with the station alternating current buses on two sides of the first section switch FD1 through the corresponding automatic transfer switches ATS, and different second alternating current loads correspond to different automatic transfer switches ATS.
7. The ac/dc power supply topology structure suitable for an all-in-one substation according to claim 6, further comprising:
the system comprises a plurality of off-station alternating current power supply interfaces for supplying power to off-station alternating current loads, wherein the off-station alternating current power supply interfaces are connected with station alternating current buses on the first side or the second side of a first section switch FD 1;
the system comprises a plurality of off-station direct current power supply interfaces for supplying power to off-station direct current loads, wherein the off-station direct current power supply interfaces are connected with station direct current buses on the first side or the second side of a second section switch FD 2;
a plurality of newly-added first alternating current loads which are connected with station alternating current buses on the first side or the second side of the first section switch FD 1;
the new second alternating current loads are connected with the station alternating current buses on two sides of the first section switch FD1 through corresponding automatic transfer switches ATS, and different new second alternating current loads correspond to different automatic transfer switches ATS;
the plurality of control protection direct current loads are connected with the direct current bus for the station.
8. The ac-dc power supply topology structure suitable for an all-in-one substation according to claim 6, further comprising a UPS module;
the data center also includes a first power distribution unit PDU1, a second power distribution unit PDU 2;
the UPS module includes: a third AC/DC module, a DC/AC module, a bypass module;
the first end of the third AC/DC module is connected with the station alternating current buses on two sides of the first section switch FD1 through an automatic transfer switch ATS corresponding to the data center; the second end of the third AC/DC module is connected with the first end of the DC/AC module, and the second end of the DC/AC module is connected with an alternating current load of the data center through a first power distribution unit PDU 1; the second end of the third AC/DC module and the first end of the DC/AC module are connected with station direct current buses at two sides of the second section switch FD2 through a static transfer switch STS; the direct current load of the data center is connected with station direct current buses at two sides of the second section switch FD2 through a second power distribution unit PDU2 and a static transfer switch STS in sequence;
and two ends of the bypass module are respectively connected with the first end of the third AC/DC module and the second end of the DC/AC module.
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