CN113437768B - Power supply system - Google Patents
Power supply system Download PDFInfo
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- CN113437768B CN113437768B CN202110680306.6A CN202110680306A CN113437768B CN 113437768 B CN113437768 B CN 113437768B CN 202110680306 A CN202110680306 A CN 202110680306A CN 113437768 B CN113437768 B CN 113437768B
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- 230000003287 optical effect Effects 0.000 claims abstract description 61
- 238000004146 energy storage Methods 0.000 claims description 61
- 238000010248 power generation Methods 0.000 claims description 37
- 230000002457 bidirectional effect Effects 0.000 claims description 34
- 238000006243 chemical reaction Methods 0.000 claims description 31
- 238000003908 quality control method Methods 0.000 claims description 9
- 238000002955 isolation Methods 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 2
- 230000002401 inhibitory effect Effects 0.000 claims description 2
- 230000004927 fusion Effects 0.000 abstract description 13
- 238000010586 diagram Methods 0.000 description 9
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
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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
- H02J5/00—Circuit arrangements for transfer of electric power between ac networks and dc networks
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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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
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/22—The renewable source being solar energy
- H02J2300/24—The renewable source being solar energy of photovoltaic origin
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present application relates to a power supply system. The system comprises: the system comprises a transformer substation, an optical storage station, a charging station, a data center and a base station, wherein the transformer substation, the optical storage station, the charging station, the data center and the base station are connected through a direct current bus; the transformer substation, the optical storage station and the charging station are all used for providing electric energy for the data center and the base station. The data center and the base station in the power supply system after multi-station fusion do not need to be provided with independent power supply systems, and can normally operate through electric energy provided by a transformer substation, an optical storage station and a charging station, so that the application cost of the power supply system in the fusion station is reduced, meanwhile, the variety of power sources is reduced, the universality of the power sources is improved, and the power supply efficiency is further improved.
Description
Technical Field
The application relates to the technical field of smart power grids, in particular to a power supply system.
Background
The multi-station fusion is to fuse and build a data center, a charging and exchanging station, an energy storage station, a 5G base station, a Beidou base station photovoltaic station and the like on substation site resources, build an internal support electric power Internet of things through deep excavation of substation resource values, externally cultivate an emerging market and promote infrastructure construction of novel digits of the whole society.
At present, a transformer substation, a charging and replacing power station, an optical storage power station, a data center and a 5G macro base station are provided with relatively independent power supply systems, so that the cost of the power supply systems after multi-station fusion in the prior art is relatively high.
Disclosure of Invention
In view of the above, it is necessary to provide a power supply system with low cost.
A power supply system, the system comprising:
the substation, the optical storage station, the charging station, the data center and the base station are connected through a direct current bus;
the transformer station, the optical storage station and the charging station are all used for providing electric energy for the data center and the base station.
In one embodiment, a substation comprises: an alternating current grid and a hybrid AC/DC converter;
the hybrid AC/DC converter is used for converting alternating current provided by the alternating current power grid into direct current and transmitting the direct current to electric equipment in the data center, the base station and the charging station through the direct current bus;
the hybrid AC/DC converter is also used for converting direct current provided by the photovoltaic power station through a direct current bus into alternating current and transmitting the converted alternating current to an alternating current sensitive load in the transformer station; or transmitting alternating current to an alternating current power grid, and carrying out electric energy quality control on the alternating current power grid.
In one embodiment, a hybrid AC/DC converter includes: a bidirectional non-isolated AC/DC converter and a unidirectional non-isolated AC/DC converter;
the unidirectional non-isolated AC/DC converter is used for converting alternating current provided by an alternating current power grid into direct current and transmitting the direct current to electric equipment in a data center, a base station and a charging station through a direct current bus;
the bidirectional non-isolated AC/DC converter is used for converting direct current provided by the photovoltaic power station through a direct current bus into alternating current and transmitting the converted electric energy to an alternating current sensitive load; or transmitting alternating current to an alternating current power grid, and carrying out electric energy quality control on the alternating current power grid.
In one embodiment, an optical storage station comprises: a photovoltaic power generation unit and a photovoltaic energy storage unit;
the photovoltaic power generation unit is used for converting light energy into electric energy and transmitting the electric energy to the charging station, the data center and the base station through the direct current bus;
and the photovoltaic energy storage unit is used for providing compensation electric energy for the photovoltaic power generation unit so as to inhibit fluctuation of the electric energy generated by the photovoltaic power generation unit.
In one embodiment, the photovoltaic power generation unit is further configured to convert light energy into electric energy when the substation stops supplying power, transmit the electric energy to the bidirectional non-isolated AC/DC converter through the DC bus to perform electric energy conversion from direct current to alternating current, and transmit the converted electric energy to the AC sensitive load.
In one embodiment, the optical storage station further comprises: a first non-isolated DC-DC converter and a second non-isolated DC-DC converter; the first non-isolated DC-DC converter is connected between the direct current bus and the photovoltaic power generation unit, and the second non-isolated DC-DC converter is connected between the direct current bus and the photovoltaic energy storage unit;
the first non-isolated DC-DC converter is used for performing electric energy grade conversion on electric energy generated by the photovoltaic power generation unit and transmitting the converted electric energy to the charging station, the data center and the base station through the direct current bus;
the second non-isolated DC-DC converter is used for performing electric energy level conversion on the compensation electric energy provided by the photovoltaic energy storage unit and inhibiting fluctuation of the electric energy generated by the photovoltaic power generation unit by utilizing the converted electric energy.
In one embodiment, the first non-isolated DC-DC converter is further configured to perform power level conversion on electric energy generated by the photovoltaic power generation unit when the substation stops supplying power, and transmit the converted electric energy to the bidirectional non-isolated AC/DC converter for power conversion through the direct current bus, and transmit the converted electric energy to the AC sensitive load.
In one embodiment, a charging station includes: a third bidirectional isolated DC-DC converter;
the third bidirectional isolation type DC-DC converter is used for converting electric energy provided by electric equipment of the charging station when the power supply of the transformer substation is stopped, and transmitting the converted electric energy to the data center and the base station through the direct current bus;
the third bidirectional isolation type DC-DC converter is further used for receiving electric energy provided by the transformer substation and converting the electric energy level when the transformer substation supplies power normally, and providing the converted electric energy to electric equipment of the charging station.
In one embodiment, a data center includes: the system comprises a server, a data center energy storage unit and a fourth unidirectional DC-DC converter;
the fourth unidirectional DC-DC converter is used for performing electric energy grade conversion on electric energy transmitted by the transformer substation, the optical storage station and the charging station through the direct current bus and transmitting the converted electric energy to the server;
and the data center energy storage unit is used for providing electric energy for the server when the power supply of the transformer substation is stopped.
In one embodiment, a base station includes: the micro base station, the base station energy storage unit and the fifth unidirectional DC-DC converter;
the fifth unidirectional DC-DC converter is used for performing electric energy grade conversion on electric energy transmitted by the transformer substation, the optical storage station and the charging station through the direct current bus and transmitting the converted electric energy to the micro base station;
and the base station energy storage unit is used for providing electric energy for the micro base station when the power supply of the transformer substation is stopped.
The power supply system comprises: the system comprises a transformer substation, an optical storage station, a charging station, a data center and a base station, wherein the transformer substation, the optical storage station, the charging station, the data center and the base station are connected through a direct current bus, and the transformer substation, the optical storage station and the charging station are all used for providing electric energy for the data center and the base station. The data center and the base station in the power supply system after multi-station fusion do not need to be provided with independent power supply systems, and can normally operate through electric energy provided by a transformer substation, an optical storage station and a charging station, so that the application cost of the power supply system in the fusion station is reduced, meanwhile, the variety of power sources is reduced, the universality of the power sources is improved, and the power supply efficiency is further improved.
Drawings
FIG. 1 is a block diagram of a power supply system in one embodiment;
FIG. 2 is a block diagram of a power supply system in another embodiment;
FIG. 3 is a block diagram of a power supply system in another embodiment;
FIG. 4 is a block diagram of a power supply system in another embodiment;
FIG. 5 is a block diagram of a power supply system in another embodiment;
FIG. 6 is a block diagram of a power supply system in another embodiment;
FIG. 7 is a block diagram of a power supply system in another embodiment;
fig. 8 is a block diagram of a power supply system according to another embodiment.
Reference numerals illustrate:
101: a transformer station; 102: an optical storage station; 103: a charging station; 104: a data center;
105: a base station; 106: a direct current bus; 1011: an alternating current grid; 1012: a hybrid AC/DC converter;
1013: an ac sensitive load; 2021: a bidirectional non-isolated AC/DC converter;
2022: a unidirectional non-isolated AC/DC converter; 1021: a photovoltaic power generation unit;
1022: a photovoltaic energy storage unit; 1023: a first non-isolated DC-DC converter;
1024: a second non-isolated DC-DC converter;
1032: a third bidirectional isolated DC-DC converter; 1041: a server;
1042: a data center energy storage unit; 1043: a fourth unidirectional DC-DC converter;
1051: a micro base station; 1052: a base station energy storage unit; 1053: and a fifth unidirectional DC-DC converter.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
The reference numerals used for the components in this application, such as "first," "second," etc., are used merely to distinguish between the described objects, and do not have any sequential or technical meaning. The terms "coupled" and "connected," as used herein, are intended to encompass both direct and indirect coupling (coupling), unless otherwise indicated. In the description of the present application, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," etc. indicate or refer to an orientation or positional relationship based on that shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.
In this application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
At present, a transformer station, a charging station, an optical storage station, a data center and a 5G macro base station in multi-station fusion are provided with relatively independent power supply systems, the types of power supplies in the power supply systems are more, the functions are single, the universality is poor, the cost of the power supply system of the whole fusion station is relatively high, the efficiency is relatively low, and the utilization rate of an energy storage unit is relatively low. In addition to multi-station space fusion and service fusion, multi-station power fusion is needed, so that the variety of power sources is reduced, the functions of the power sources are increased, the universality of the power sources is improved, and a low-cost, high-efficiency and high-utilization power supply system is provided for multi-station fusion.
FIG. 1 is a block diagram of a multi-station fused power supply system, in one embodiment, as shown in FIG. 1, a power supply system is provided, comprising: substation 101, optical storage station 102, charging station 103, data center 104, and base station 105, substation 101, optical storage station 102, charging station 103, data center 104, and base station 105 are connected by dc bus 106;
substation 101, optical storage station 102, charging station 103 are all used to provide electrical energy to data center 104 and base station 105.
Specifically, a transformer station, an optical storage station, a charging station, a data center and a base station in the power supply system are all connected with a direct current bus; the transformer substation can transmit 10kV/380 voltage electric energy provided by an alternating current power grid to a data center and a base station through a direct current bus to supply power to the data center and the base station; optionally, the substation may also supply power to an ac sensitive load or to the consumer of the charging station. The base stations may include, but are not limited to, 5G base stations, 4F base stations, and the like.
The optical storage station can supply power to the data center and the base station at the same time of the transformer substation, and can convert optical energy into electric energy which is transmitted to the data center and the base station through the direct current bus to supply power to the data center and the base station; the optical storage station can supply power to the data center and the base station firstly, and when the power requirements of the data center and the base station cannot be met, the power is supplied to the data center and the base station through the transformer station; the optical storage station may also be used to supply power to the data center and the base station when the power supplied by the substation to the data center and the base station is insufficient, which is not limited herein.
The charging station can transmit the electric energy fed back by the electric equipment of the charging station to the data center and the base station through the direct current bus to supply power for the data center and the base station. Wherein, the voltage of the direct current bus is 750V.
In the present embodiment, since the power supply system includes: the system comprises a transformer substation, an optical storage station, a charging station, a data center and a base station, wherein the transformer substation, the optical storage station, the charging station, the data center and the base station are connected through a direct current bus, and the transformer substation, the optical storage station and the charging station are all used for providing electric energy for the data center and the base station. The data center and the base station in the power supply system after multi-station fusion do not need to be provided with independent power supply systems, and can normally operate through electric energy provided by the transformer substation, the optical storage station and the charging station, so that the application cost of the power supply system is reduced, meanwhile, the variety of power supplies is reduced, the universality of the power supplies is improved, and the power supply efficiency is further improved.
While the foregoing embodiments describe a power supply system, a substation in the power supply system will be further described with an embodiment, in one embodiment, as shown in fig. 2, a substation 101 includes: an alternating current grid 1011 and a hybrid AC/DC converter 1012;
a hybrid AC/DC converter 1012 for converting the AC power supplied from the AC power grid 1011 into DC power and transmitting the DC power to the data center 104, the base station 105, and the electric equipment 1031 in the charging station 103 via the DC bus 106;
the hybrid AC/DC converter 1012 is further configured to convert DC power provided by the photovoltaic power station 102 through the DC bus 106 into AC power, and transmit the converted AC power to the AC sensitive load 1013 in the transformer 101; or transmitting alternating current to an alternating current power grid, and carrying out electric energy quality control on the alternating current power grid.
Specifically, when the AC power grid can provide AC power with a voltage of 10kV/380, the AC power is transmitted to the hybrid AC/DC converter, and the hybrid AC/DC converter can convert the AC power into DC power and then transmit the DC power to the electric equipment in the data center, the base station and the charging station via the DC bus. The electric device of the charging station can comprise an electric automobile, an electric charging bicycle and the like, and is not limited herein.
When the alternating current power grid in the transformer supplies power to the alternating current sensitive load, if the electric energy provided by the alternating current sensitive load cannot be met, the direct current provided by the optical storage station through the direct current bus can be transmitted to the hybrid AC/DC converter, the direct current is converted into alternating current, and the converted alternating current is transmitted to the alternating current sensitivity in the alternating current power grid; or the electric energy provided by the optical storage station is converted and then transmitted to the alternating current power grid, and the alternating current power grid can be subjected to electric energy quality management including reactive compensation, active filtering, three-phase imbalance management and the like. Alternatively, the ac power grid may also directly transfer ac power into an ac sensitive load.
Further, as shown in fig. 3, the hybrid AC/DC converter 1012 includes: a bidirectional non-isolated AC/DC converter 2021 and a unidirectional non-isolated AC/DC converter 2022;
a unidirectional non-isolated AC/DC converter 2022 for converting AC power provided by the AC power grid 1011 into DC power and transmitting the DC power to the data center 104, the base station 105, and the powered device 1031 in the charging station 103 via the DC bus 106;
the bidirectional non-isolated AC/DC converter 2021 is configured to convert DC power provided by the photovoltaic power station through a DC bus into AC power, and transmit the converted power to an AC sensitive load; or transmitting alternating current to an alternating current power grid, and carrying out electric energy quality control on the alternating current power grid.
Specifically, the capacity of the unidirectional non-isolated AC/DC converter requires a maximum power capacity that meets the power requirements of the data center and base station and a maximum capacity that meets the requirements of the AC sensitive loads; the unidirectional non-isolated AC/DC converter can convert alternating current provided by an alternating current power grid into direct current, and the direct current is transmitted to a data center, a base station and electric equipment in a charging station through a direct current bus to supply power to the data center, the base station and the electric equipment in the charging station.
The capacity of the bidirectional non-isolated AC/DC converter is required to meet the capacity requirement of the alternating-current side sensitive load power supply, the electric energy provided by the optical storage station through the direct-current bus can be subjected to electric energy level conversion, and the converted electric energy is transmitted to the alternating-current sensitive load. Optionally, because the bidirectional non-isolated AC/DC converter further has the characteristic of power quality control, the capacity of the bidirectional non-isolated AC/DC converter can also meet the power capacity required by power quality control when meeting the capacity requirement of the AC side sensitive load power supply, and the power quality control is performed on the AC power grid by using the power provided by the optical storage station.
In this embodiment, since the substation includes: the hybrid AC/DC converter converts alternating current provided by the alternating current power grid into direct current and transmits the direct current to electric equipment in the data center, the base station and the charging station through a direct current bus, and also converts direct current provided by the optical storage station through the direct current bus into alternating current and transmits the converted alternating current to an alternating current sensitive load in the transformer. The power provided by the alternating current power grid can be transmitted to the data center and the base station, so that the power supply systems of the data center and the base station are reduced, and the cost is reduced. Meanwhile, the hybrid AC/DC converter comprises a bidirectional non-isolated AC/DC converter and a unidirectional non-isolated AC/DC converter, the unidirectional AC/DC converter has the advantages of low cost and high efficiency, the bidirectional AC/DC converter has the advantages of rectifying to direct current load power supply, inverting to alternating current sensitive load power supply and electric energy quality management, and therefore, the hybrid AC/DC converter integrates the advantages of the unidirectional and bidirectional AC/DC converters, reduces the cost of adopting only a plurality of bidirectional converters, solves the problem of single function of adopting only the unidirectional converter, has the characteristic of high cost performance, improves the utilization ratio of the converter and improves the power supply efficiency.
While the foregoing embodiments describe the substation of the power supply system, the optical storage station will now be further described in one embodiment, as shown in fig. 4, the optical storage station 102 includes: a photovoltaic power generation unit 1021 and a photovoltaic energy storage unit 1022;
the photovoltaic power generation unit 1021 is used for converting light energy into electric energy and transmitting the electric energy to the charging station 103, the data center 104 and the base station 105 through the direct current bus 106;
the photovoltaic energy storage unit 1022 is configured to provide compensation power to the photovoltaic power generation unit 1021 to suppress fluctuation of power generated by the photovoltaic power generation unit.
Specifically, the photovoltaic power generation unit may include a photovoltaic panel, and a conversion circuit converts light energy collected by the photovoltaic panel into electric energy, and transmits the electric energy to a charging station, a data center and a base station through a direct current bus to supply power to the charging station, the data center and the base station. Because the photovoltaic power generation unit supplies power to the charging station, the data center and the base station, the provided electric energy may have unstable electric energy, for example, although the light energy can be collected in the daytime, the intensity of the light is different, the generated electric energy is different, and the provided electric energy is not stable electric energy, at this time, the compensation electric energy can be provided for the photovoltaic power generation unit through the photovoltaic energy storage unit, so that the fluctuation of the electric energy generated by the photovoltaic power generation unit is restrained. The photovoltaic energy storage unit can be set to be a storage battery with 750V voltage configuration, and can supply power to the data center and the base station for 8 hours continuously, and in practical application, the energy storage capacity of the storage battery can be reduced or increased appropriately according to the reliability of power supply of the power distribution network.
Optionally, the photovoltaic power generation unit is further configured to convert light energy into electric energy when the substation stops supplying power, transmit the electric energy to the bidirectional non-isolated AC/DC converter through the direct current bus to perform electric energy conversion from direct current to alternating current, and transmit the converted electric energy to the alternating current sensitive load.
Further, as shown in fig. 5, the optical storage station 102 further includes: a first non-isolated DC-DC converter 1023 and a second non-isolated DC-DC converter 1024; the first non-isolated DC-DC converter 1023 is connected between the DC bus 106 and the photovoltaic power generation unit 1021, and the second non-isolated DC-DC converter 1024 is connected between the DC bus 106 and the photovoltaic energy storage unit 1022;
a first non-isolated DC-DC converter 1023 for performing power level conversion on the power generated by the photovoltaic power generation unit 1021, and transmitting the converted power to the charging station 103, the data center 104, and the base station 105 through the DC bus 106;
the second non-isolated DC-DC converter 1024 is configured to perform power level conversion on the compensation power supplied from the photovoltaic energy storage unit 1022, and to suppress fluctuation of the power generated by the photovoltaic power generation unit 1021 by using the converted power.
Specifically, since the voltage of the DC bus is 750V, it is first necessary to convert the electric energy into the voltage that the DC bus can receive through the first non-isolated DC-DC converter after the photovoltaic power generation unit generates the electric energy. Similarly, the compensation electric energy provided by the photovoltaic energy storage unit also needs to be converted into electric energy of voltage which can be received by the direct current bus through the electric energy grade conversion of the second non-isolated DC-DC converter.
Optionally, the first non-isolated DC-DC converter is further configured to perform power level conversion on electric energy generated by the photovoltaic power generation unit when the power supply of the transformer substation is stopped, and transmit the converted electric energy to the bidirectional non-isolated AC/DC converter for power conversion through the direct current bus, and transmit the converted electric energy to the AC sensitive load.
In this embodiment, since the optical storage station includes: the photovoltaic power generation unit converts light energy into electric energy and transmits the electric energy to the charging station, the data center and the base station through the direct current bus, and the photovoltaic power storage unit provides compensation electric energy for the photovoltaic power generation unit so as to inhibit fluctuation of the electric energy generated by the photovoltaic power generation unit. Therefore, the power supply device can supply power to the load modules requiring electric energy under the condition of insufficient voltage provided by the transformer substation, avoid instability of the electric energy generated by the photovoltaic power generation unit, inhibit fluctuation of the electric energy by the photovoltaic energy storage unit and provide stable electric energy to different load modules. Meanwhile, all electric energy is at the same energy level in the middle conversion process through the direct current bus, so that electric energy transmission among different modules is facilitated. And the centralized energy storage of the optical storage unit and the distributed energy storage units distributed in the base station and the data center reduce the acquisition cost and improve the utilization rate of the energy storage units.
While the foregoing embodiment describes the optical storage station in the power supply system, the substation of the power supply system will be described with an embodiment, and in an embodiment, as shown in fig. 6, the charging station 103 includes: a third bi-directional isolated DC-DC converter 1032;
a third bidirectional isolated DC-DC converter 1032 for converting electric energy provided by the electric equipment 1031 of the charging station when the power supply of the substation 101 is stopped, and transmitting the converted electric energy to the data center 104 and the base station 105 through the DC bus 106;
the third bidirectional isolated DC-DC converter 1032 is further configured to receive electric energy provided by the substation 101 and perform electric energy level conversion when the substation 101 supplies power normally, and provide the converted electric energy to the electric equipment 1031 of the charging station.
Specifically, when the transformer substation is abnormal, the alternating current power grid cannot provide electric energy to stop supplying power, electric equipment of the charging station can provide own electric energy, and after electric energy level conversion is performed through the third bidirectional isolation type DC-DC converter, the electric energy is transmitted to the data center and the base station through the direct current bus to supply power to the data center and the base station. When the transformer substation supplies power normally, electric energy provided by the transformer substation is received, electric energy level conversion is carried out, and the converted electric energy is provided for electric equipment of the charging station.
In this embodiment, the charging station includes: a third bidirectional isolated DC-DC converter; when the power supply of the transformer substation is stopped, the third bidirectional isolation type DC-DC converter converts electric energy provided by electric equipment of the charging station, and transmits the converted electric energy to the data center and the base station through a direct current bus; and the third bidirectional isolation type DC-DC converter is used for receiving the electric energy provided by the transformer substation and converting the electric energy level when the transformer substation supplies power normally, and providing the converted electric energy for electric equipment of the charging station. The power consumption requirement of the electric equipment of the charging station can be met when the transformer substation normally works, and meanwhile, when the transformer substation is abnormal, the power can be fed back to the data center and the base station to supply power for the data center and the base station, so that the power consumption requirement is met.
While the foregoing embodiments describe substations in a power supply system, a data center in a power supply system will now be further described in one embodiment, as shown in fig. 7, in one embodiment, the data center 104 includes: a server 1041, a data center energy storage unit 1042, and a fourth unidirectional DC-DC converter 1043;
a fourth unidirectional DC-DC converter 1043, configured to perform power level conversion on power transmitted by the substation 101, the optical storage station 102, and the charging station 103 through the DC bus, and transmit the converted power to the server 1043;
data center energy storage unit 1042 is configured to provide electrical energy to server 1043 when substation 101 ceases to supply power.
Specifically, when the transformer station, the optical storage station and the charging station provide electric energy to the server, the electric energy can be firstly transmitted to the fourth unidirectional DC-DC converter through the direct current bus to perform electric energy level conversion, and then the converted electric energy is transmitted to the server through the fourth unidirectional DC-DC converter.
The data center comprises at least one server, a data center energy storage unit and a fourth unidirectional DC-DC converter, and when the power supply of the transformer substation is stopped, the data center energy storage unit provides electric energy for the data center energy storage unit to supply power to the server. The data center energy storage unit can be set to 240V voltage to configure a small-capacity storage battery, and can be designed according to the capacity of supplying power to a server of the data center for 5 minutes continuously. If the storage battery setting capacity is exceeded, the light storage unit in the light storage station can continue to supply power.
In this embodiment, since the data center includes: the system comprises a server, a data center energy storage unit and a fourth unidirectional DC-DC converter; the fourth unidirectional DC-DC converter converts electric energy transmitted by the transformer substation, the optical storage station and the charging station through the direct current bus into electric energy grade, and transmits the converted electric energy to the server; and when the power supply of the transformer substation is stopped, the data center energy storage unit provides electric energy for the server. The power supply system can convert electric energy provided by a transformer substation, an optical storage station and a charging station into electric energy which can be received by a server, and when the transformer substation stops supplying power, a standby power unit, namely a data center energy storage unit, is started to supply power for the server, so that normal operation of the server is ensured. Meanwhile, the centralized energy storage of the optical storage unit and the scattered energy storage mode of the data center energy storage unit are adopted to replace an independent scattered energy storage mode, and the purchase cost is reduced and the utilization rate of the storage battery is improved by adopting the design of the small-capacity data center energy storage unit.
While the foregoing embodiments describe a data center in a power supply system, a base station will now be further described in one embodiment, as shown in fig. 8, a base station 105 includes: a micro base station 1051, a base station energy storage unit 1052, and a fifth unidirectional DC-DC converter 1053;
a fifth unidirectional DC-DC converter 1053 for performing power level conversion on the power transmitted from the substation 101, the optical storage station 102, and the charging station 103 via the DC bus 106, and transmitting the converted power to the micro base station 1051;
base station energy storage unit 1052 is configured to provide electrical energy to micro base station 1051 when substation 101 ceases to supply power.
Specifically, when the substation, the optical storage station and the charging station provide electric energy to the micro base station, the electric energy can be firstly transmitted to the fifth unidirectional DC-DC converter through the direct current bus to perform electric energy level conversion, and then the converted electric energy is transmitted to the micro base station through the fifth unidirectional DC-DC converter.
The base station comprises at least one micro base station, a base station energy storage unit and a fifth unidirectional DC-DC converter, and when the power supply of the transformer substation is stopped, the base station energy storage unit provides own electric energy to supply power to the server. The base station energy storage unit can be set to 240V voltage to configure a small-capacity storage battery, and can be designed according to the capacity for supplying power to each micro base station of the base station for 5 minutes continuously. If the storage battery setting capacity is exceeded, the light storage unit in the light storage station can continue to supply power.
In this embodiment, since the base station includes: the micro base station, the base station energy storage unit and the fifth unidirectional DC-DC converter; the fifth unidirectional DC-DC converter converts electric energy transmitted by the transformer substation, the optical storage station and the charging station through the direct current bus into electric energy grade, and transmits the converted electric energy to the micro base station; and when the power supply of the transformer substation is stopped, the base station energy storage unit supplies electric energy to the micro base station. The power provided by the transformer substation, the optical storage station and the charging station can be converted into the power which can be received by the micro base station, and when the power supply of the transformer substation is stopped, the standby power unit is started, namely the base station energy storage unit supplies power for the micro base station, so that the normal operation of the micro base station is ensured. Meanwhile, the centralized energy storage of the optical storage unit and the scattered energy storage mode of the base station energy storage unit are adopted to replace an independent scattered energy storage mode, and the purchase cost is reduced and the storage battery utilization rate of the base station energy storage unit is improved by adopting the design of the base station energy storage unit with small capacity.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples merely represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (10)
1. A power supply system, the system comprising: the system comprises a transformer substation, an optical storage station, a charging station, a data center and a base station, wherein the transformer substation, the optical storage station, the charging station, the data center and the base station are connected through a direct current bus; the transformer substation, the optical storage station and the charging station are all used for providing electric energy for the data center and the base station; the optical storage station comprises: a photovoltaic power generation unit and a photovoltaic energy storage unit;
the optical storage station is used for converting optical energy collected by the photovoltaic panel into electric energy through the conversion circuit when the electric energy provided by the transformer substation for the data center and the base station is insufficient, and transmitting the electric energy to the data center and the base station through the direct current bus to supply power for the data center and the base station ；
The substation comprises: an alternating current grid and a hybrid AC/DC converter, wherein:
the hybrid AC/DC converter is configured to convert AC power provided by the AC power grid into DC power, and transmit the DC power to the data center, the base station, and electric equipment in the charging station through the DC bus;
the hybrid AC/DC converter is further used for converting direct current provided by the optical storage station through the direct current bus into alternating current and transmitting the converted alternating current to an alternating current sensitive load in the substation; or when the capacity requirement of alternating-current side sensitive load power supply is met, transmitting the alternating current to the alternating current power grid, and performing reactive compensation, active filtering and three-phase unbalanced power quality control on the alternating current power grid;
the hybrid AC/DC converter includes: a bidirectional non-isolated AC/DC converter and a unidirectional non-isolated AC/DC converter;
the capacity of the unidirectional non-isolated AC/DC converter requires the maximum power capacity required to meet the power supply requirements of the data center and the base station and the maximum capacity required by the AC sensitive load;
the capacity of the bidirectional non-isolated AC/DC converter is required to meet the capacity requirement of alternating-current side sensitive load power supply;
the charging station includes: a third bidirectional isolated DC-DC converter;
the third bidirectional isolation type DC-DC converter is used for converting electric energy provided by electric equipment of the charging station when the power supply of the transformer substation is stopped, and transmitting the converted electric energy to the data center and the base station through the direct current bus;
the third bidirectional isolation type DC-DC converter is further used for receiving the electric energy provided by the transformer substation and performing electric energy level conversion when the transformer substation supplies power normally, and providing the converted electric energy to electric equipment of the charging station.
2. The system of claim 1, wherein the charging station is configured to transmit power fed back by the powered device of the charging station to the data center and the base station via the dc bus to power the data center and the base station.
3. The system of claim 2, wherein the system further comprises;
the unidirectional non-isolated AC/DC converter is used for converting alternating current provided by the alternating current power grid into direct current and transmitting the direct current to electric equipment in the data center, the base station and the charging station through the direct current bus;
the bidirectional non-isolated AC/DC converter is used for converting direct current provided by the optical storage station through the direct current bus into alternating current and transmitting the converted electric energy to the alternating current sensitive load; or transmitting the alternating current to the alternating current power grid, and performing power quality control on the alternating current power grid.
4. The system of claim 3, wherein the system further comprises a controller configured to control the controller,
the photovoltaic power generation unit is used for converting light energy into electric energy and transmitting the electric energy to the charging station, the data center and the base station through the direct current bus;
the photovoltaic energy storage unit is used for providing compensation electric energy for the photovoltaic power generation unit so as to inhibit fluctuation of electric energy generated by the photovoltaic power generation unit.
5. The system of claim 4, wherein the photovoltaic power generation unit is further configured to convert the light energy into electrical energy and transmit the electrical energy to the bidirectional non-isolated AC/DC converter via the DC bus for conversion of the electrical energy into AC power and transmit the converted electrical energy to the AC sensitive load when the power supply to the substation is stopped.
6. The system of claim 4, wherein the optical storage plant further comprises: a first non-isolated DC-DC converter and a second non-isolated DC-DC converter; the first non-isolated DC-DC converter is connected between the direct current bus and the photovoltaic power generation unit, and the second non-isolated DC-DC converter is connected between the direct current bus and the photovoltaic energy storage unit;
the first non-isolated DC-DC converter is used for performing electric energy level conversion on electric energy generated by the photovoltaic power generation unit and transmitting the converted electric energy to the charging station, the data center and the base station through the direct current bus;
the second non-isolated DC-DC converter is used for performing electric energy level conversion on the compensation electric energy provided by the photovoltaic energy storage unit and inhibiting fluctuation of the electric energy generated by the photovoltaic power generation unit by utilizing the converted electric energy.
7. The system of claim 6, wherein the first non-isolated DC-DC converter is further configured to convert the electric energy generated by the photovoltaic power generation unit into an electric energy level when the power supply of the substation is stopped, and transmit the converted electric energy to the bidirectional non-isolated AC/DC converter via the DC bus for electric energy conversion, and transmit the converted electric energy to the AC sensitive load.
8. The system of claim 1, wherein the dc bus has a voltage of 750V.
9. The system of claim 1, wherein the data center comprises: the system comprises a server, a data center energy storage unit and a fourth unidirectional DC-DC converter;
the fourth unidirectional DC-DC converter is used for performing electric energy grade conversion on electric energy transmitted by the transformer substation, the optical storage station and the charging station through the direct current bus and transmitting the converted electric energy to the server;
the data center energy storage unit is used for providing electric energy for the server when the power supply of the transformer substation is stopped.
10. The system of claim 1, wherein the base station comprises: the micro base station, the base station energy storage unit and the fifth unidirectional DC-DC converter;
the fifth unidirectional DC-DC converter is used for performing electric energy grade conversion on electric energy transmitted by the transformer substation, the optical storage station and the charging station through the direct current bus, and transmitting the converted electric energy to the micro base station;
and the base station energy storage unit is used for providing electric energy for the micro base station when the power supply of the transformer substation is stopped.
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