CN219477604U - Power supply system - Google Patents
Power supply system Download PDFInfo
- Publication number
- CN219477604U CN219477604U CN202320253003.0U CN202320253003U CN219477604U CN 219477604 U CN219477604 U CN 219477604U CN 202320253003 U CN202320253003 U CN 202320253003U CN 219477604 U CN219477604 U CN 219477604U
- Authority
- CN
- China
- Prior art keywords
- module
- power
- energy
- energy storage
- power supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present utility model relates to a power supply system comprising: the system comprises a power grid, a reserve power module, an energy storage module, a load module, an energy management module, a power supply module and/or an energy storage conversion module; the power supply module is used for converting alternating current of the power grid and outputting electric energy; the energy storage conversion module is used for acquiring electric energy from a power grid according to the dispatching of the energy management module or acquiring electric energy from the energy storage module; the energy storage module is used for acquiring electric energy according to the dispatching of the energy management module to charge or discharge so as to output the electric energy; the power reserve module is used for acquiring electric energy to supply power for the load module when the output of the power supply module is abnormal or the power supply module does not participate in power supply; and according to the dispatching of the energy management module, acquiring electric energy to charge the energy storage module when the output of the power supply module is normal, or acquiring electric energy from the energy storage module to supply power to the load module. The utility model can improve the energy utilization efficiency of renewable energy sources and energy storage elements and reduce the construction and operation cost of the system.
Description
Technical Field
The utility model relates to the field of power supplies, in particular to a power supply system.
Background
Renewable energy sources such as wind energy and solar energy are included in the data center, and the use level of green electric energy of the data center can be greatly improved by combining energy storage. At present, only the data center is simply connected with the renewable energy power generation equipment, and the problems of hardware equipment redundancy of renewable energy sources and the like exist.
Disclosure of Invention
The utility model provides a power supply system which can improve the energy utilization efficiency of renewable energy sources and energy storage elements and reduce the construction and operation cost of the system.
An embodiment of the present utility model provides a power supply system, including: the system comprises a power grid, a reserve power module, an energy storage module, a load module, an energy management module, a power supply module and/or an energy storage conversion module;
the power grid is connected with the power supply module and/or the energy storage conversion module, the power supply module and the electricity storage module are connected with the load module, the energy storage conversion module and the electricity storage module are connected with the energy storage module, and the power grid, the power supply module, the electricity storage module, the energy storage conversion module and the energy storage module are all in communication connection with the energy management module;
the energy management module is used for scheduling the reserve power module, the energy storage module and the energy storage conversion module;
the power supply module is used for converting alternating current of the power grid and outputting electric energy;
the energy storage conversion module is used for acquiring electric energy from the power grid according to the dispatching of the energy management module or acquiring electric energy from the energy storage module;
the energy storage module is used for acquiring electric energy to charge or discharging according to the dispatching of the energy management module so as to output the electric energy;
the power reserve module is used for acquiring electric energy to supply power for the load module when the output of the power supply module is abnormal or the power supply module does not participate in power supply; and according to the scheduling of the energy management module, acquiring electric energy to charge the energy storage module when the output of the power supply module is normal, or acquiring electric energy from the energy storage module to supply power to the load module.
In some embodiments, the power supply system further comprises:
the storage power module, the energy storage module and the energy storage conversion module are connected with the first bus, and the first bus is used for transmitting electric energy among the storage power module, the energy storage module and the energy storage conversion module.
In some embodiments, the system further comprises a new energy power generation module, the new energy power generation module is connected to the reserve power module or/and the energy storage module through the first bus, and the new energy power generation module is used for generating new energy according to the scheduling of the energy management module so as to output new energy power.
In some embodiments, the new energy source electrical energy powers the load module through the reserve module.
In some embodiments, the new energy electrical energy is further used for being stored by the energy storage module or/and transmitted to the power grid through the energy storage conversion module when the new energy electrical energy is greater than the electrical energy required by the load module.
In some embodiments, the energy storage converter module is specifically configured to obtain, according to the schedule of the energy management module, electrical energy of the power grid, and transmit the electrical energy to the energy storage module and/or the power reserve module, or enable the energy storage module to output electrical energy to the power grid so as to perform frequency modulation and voltage regulation on the power grid.
In some embodiments, the power grid comprises one power grid, or a plurality of independent power grids, each connected to a power module or/and an energy storage conversion module.
In some embodiments, the power supply system further comprises:
the power module, the reserve power module and the load module are all connected with the second bus, and the second bus is used for transmitting electric energy among the power module, the reserve power module and the load module.
In some embodiments, the new energy power generation module includes:
the photovoltaic power generation unit or/and the wind power generation unit is connected with the first bus;
the photovoltaic power generation unit is used for carrying out photovoltaic power generation and outputting photovoltaic electric energy;
the wind power generation unit is used for wind power generation and outputting wind power energy.
In some embodiments, the photovoltaic power generation unit includes:
photovoltaic cells and photovoltaic inverters;
the photovoltaic converter is connected with the photovoltaic cell and the first bus;
the photovoltaic converter is used for converting electric energy generated by the photovoltaic cell into photovoltaic electric energy.
In some embodiments, the wind power generation unit comprises:
a wind power generator and a wind power converter;
the wind power converter is connected with the wind power generator and the first bus;
the wind power converter is used for converting electric energy generated by the wind driven generator into wind power energy.
In some embodiments, the second bus includes at least one set of dc buses, optionally at least one set of ac buses,
the power module, the reserve power module and the load module are all connected with the at least one group of direct current buses, and the power module, the reserve power module and the load module are all connected with the at least one group of alternating current buses;
the at least one set of direct current buses are used for transmitting direct current;
the at least one set of ac busbars is for transmitting ac power.
The power supply system provided by the embodiment of the utility model comprises: the system comprises a power grid, a reserve power module, an energy storage module, a load module, an energy management module, a power supply module and/or an energy storage conversion module; the power grid is connected with the power supply module and/or the energy storage conversion module, the power supply module and the electricity storage module are connected with the load module, the energy storage conversion module and the electricity storage module are connected with the energy storage module, and the power grid, the power supply module, the electricity storage module, the energy storage conversion module and the energy storage module are all in communication connection with the energy management module; the energy management module is used for scheduling the reserve power module, the energy storage module and the energy storage conversion module; the power supply module is used for converting alternating current of the power grid and outputting electric energy; the energy storage conversion module is used for acquiring electric energy from the power grid according to the dispatching of the energy management module or acquiring electric energy from the energy storage module; the energy storage module is used for acquiring electric energy to charge or discharging according to the dispatching of the energy management module so as to output the electric energy; the power reserve module is used for acquiring electric energy to supply power for the load module when the output of the power supply module is abnormal or the power supply module does not participate in power supply; and according to the scheduling of the energy management module, acquiring electric energy to charge the energy storage module when the output of the power supply module is normal, or acquiring electric energy from the energy storage module to supply power to the load module. The power supply system provided by the embodiment of the utility model can improve the energy utilization efficiency of renewable energy sources and energy storage elements and reduce the construction and operation cost of the system.
Drawings
One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to be taken in a limiting sense, unless otherwise indicated.
Fig. 1 is a schematic structural diagram of a power supply system according to an embodiment of the present utility model;
fig. 2 is a schematic structural diagram of a load module according to an embodiment of the present utility model;
FIG. 3 is a schematic structural diagram of a new energy power generation module according to an embodiment of the present utility model;
fig. 4 is a schematic structural diagram of an energy storage module according to an embodiment of the present utility model;
FIG. 5 is a schematic diagram of the connection relationship of an energy management module according to an embodiment of the present utility model;
fig. 6 is a schematic structural diagram of a power supply system according to another embodiment of the present utility model;
fig. 7 is a schematic structural diagram of a power supply system according to another embodiment of the present utility model;
fig. 8 is a schematic structural diagram of a power supply system according to still another embodiment of the present utility model;
FIG. 9 is a schematic diagram of the power flow direction of the power supply system of FIG. 1;
fig. 10 is a detailed schematic diagram of a power supply system according to an embodiment of the present utility model.
Detailed Description
In order that the utility model may be readily understood, a more particular description thereof will be rendered by reference to specific embodiments that are illustrated in the appended drawings. It will be understood that when an element is referred to as being "fixed" to another element, it can be directly on the other element or one or more intervening elements may be present therebetween. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or one or more intervening elements may be present therebetween. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used in this specification includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a power supply system according to an embodiment of the utility model.
The power supply system 100 includes: the system comprises a power grid 1, a reserve power module 8, an energy storage module 5, a load module 4, an energy management module (not shown), a power supply module 2 and/or an energy storage converter module 7.
The power grid 1 is connected with the power supply module 2 and/or the energy storage current conversion module 7, the power supply module 2 and the storage electricity module 8 are connected with the load module 4, the energy storage current conversion module 7 and the storage electricity module 8 are connected with the energy storage module 5, and the power grid 1, the power supply module 2, the storage electricity module 8, the energy storage current conversion module 7 and the energy storage module 5 are all in communication connection with the energy management module.
The energy management module is used for scheduling the reserve power module 8, the energy storage module 5 and the energy storage conversion module 7. The power module 2 is used for converting alternating current of the power grid 1 and outputting electric energy. The energy storage converter module 7 is used for obtaining electric energy from the power grid 1 or from the energy storage module 5 according to the schedule of the energy management module. The energy storage module 5 is used for acquiring electric energy for charging or discharging according to the dispatching of the energy management module to output electric energy. The reserve power module 8 is used for acquiring electric energy to supply power for the load module 4 when the output of the power module 2 is abnormal or the power module 2 does not participate in power supply; and according to the schedule of the energy management module, acquiring electric energy to charge the energy storage module 5 when the output of the power supply module 2 is normal, or acquiring electric energy from the energy storage module 5 to supply power to the load module 4.
The energy storage current transformation module 7 is a controllable conversion device for connecting the energy storage module 5 and the power grid 1 or connecting the energy storage module 5 and the load module 4, and the energy storage current transformation module 7 can accurately and rapidly regulate voltage, frequency and power between the power grid 1 and the energy storage module 5, so that the energy storage module 5 can be charged and discharged with constant power and constant current, and the fluctuating power output can be smoothly processed.
In some embodiments, the power grid 1 comprises one power grid, or a plurality of independent power grids, each connected to the power module 2 or/and the energy storage conversion module 7.
The power grid 1 may be a medium voltage ac power grid, for example a 10kV ac power grid.
In some embodiments, the power supply system 100 further comprises: the first bus 6, the electricity reserving module 8, the energy storing module 5 and the energy storing and converting module 7 are all connected with the first bus 6, and the first bus 6 is used for transmitting electric energy among the electricity reserving module 8, the energy storing module 5 and the energy storing and converting module 7.
The first bus 6 is a dc bus, for example, a 1500V dc bus.
Specifically, the energy storage module 5 is configured to store the electric energy in the first bus 6, and output the battery electric energy to the reserve power module 8 when the power supply module 2 and the new energy power generation module 9 are not sufficiently output. The battery power is direct current.
In some embodiments, the power supply system 100 further comprises: the second bus bar 3, the power module 2, the reserve power module 8 and the load module 4 are all connected with the second bus bar 3, and the second bus bar 3 is used for transmitting electric energy among the power module 2, the reserve power module 8 and the load module 4.
In particular, the second bus 3 comprises at least one set of direct current buses, optionally at least one set of alternating current buses. The power module 2, the reserve power module 8 and the load module 4 are all connected with at least one group of direct current buses, and the power module 2, the reserve power module 8 and the load module 4 are all connected with at least one group of alternating current buses. At least one set of dc bus is used to transmit dc power. At least one set of ac bus bars is used to transmit ac power.
The dc bus may be a 240V dc bus, a 336V dc bus, or the like, and the ac bus may be a three-phase 380V ac bus.
In some embodiments, the power supply system 100 further includes a new energy power generation module 9, where the new energy power generation module 9 is connected to the reserve power module 6 and/or the energy storage module 5 through the first bus 6, and the new energy power generation module 9 is configured to perform new energy power generation according to the schedule of the energy management module so as to output new energy power.
Specifically, the new energy source electric energy supplies power to the load module 4 through the reserve power module 8.
The new energy electric energy is also used for being stored by the energy storage module 5 or/and being transmitted to the power grid through the energy storage conversion module 7 when the new energy electric energy is larger than the electric energy required by the load module 4.
In some embodiments, the energy storage converter module 7 is specifically configured to obtain, according to the schedule of the energy management module, electric energy of the power grid 1 and transmit the electric energy to the energy storage module 5 and/or the electricity reserve module 8, or make the energy storage module 5 output electric energy to the power grid 1 to perform frequency modulation and voltage regulation on the power grid 1.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a load module according to an embodiment of the utility model.
The load module 4 comprises a first class of devices 41, a second class of devices 42, a first leg 31 and a second leg 32.
The first type of device 41 includes IT devices such as servers, memories, and the like. The first branch 31 is connected to both the dc and ac bus of the second bus 3, and the first type of device 41 obtains electrical energy from the dc and ac bus of the second bus 3 via the first branch 31.
The second type of device 42 includes an ac load, typically less powerful, of an air conditioner, lighting device, or the like. The second branch 32 is connected to the ac bus of the second bus 3 and the second type of device 42 draws power from the ac bus of the second bus 3 via the second branch 32.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a new energy power generation module according to an embodiment of the utility model.
In some embodiments, the new energy power generation module 9 includes: the photovoltaic power generation unit 901 or/and the wind power generation unit 902, and the photovoltaic power generation unit 901 or/and the wind power generation unit 902 are connected to the first bus bar 6. The photovoltaic power generation unit 901 is used for performing photovoltaic power generation and outputting photovoltaic power. The wind power generation unit 902 is used for wind power generation and outputs wind power.
The new energy power generation module 9 may include new energy power generation such as hydroelectric power generation, geothermal power generation, and biomass power generation, in addition to the photovoltaic power generation unit 901 and the wind power generation unit 902 described above.
In an embodiment, the photovoltaic power generation unit 901 includes: photovoltaic cells 91 and photovoltaic inverters 92. The photovoltaic inverter 92 is connected to both the photovoltaic cells 91 and the first busbar 6. The photovoltaic converter 92 is used to convert the electrical energy generated by the photovoltaic cells 91 into photovoltaic electrical energy.
In some embodiments, wind power generation unit 902 includes: wind power generator 93 and wind power converter 94. The wind power converter 94 is connected to both the wind power generator 93 and the first bus bar 6. The wind power converter 94 is used to convert the electric power generated by the wind power generator 93 into wind power.
Specifically, the electric energy generated by the photovoltaic cells 91 and the wind power generator 93 is converted into direct current by the photovoltaic converter 92 and the wind power converter 94, and is transmitted to the first bus 6 by the power cable 95, so as to supply power to the energy storage module 5.
Wherein, photovoltaic electric energy and wind power electric energy are both direct current. Photovoltaic inverter 92 is typically a DC-DC circuit and wind power inverter 94 is typically an AC-DC circuit. In addition, both the photovoltaic converter 92 and the wind power converter 94 are configured with a communication link 96, through which communication link 96 the energy management module can communicate.
Referring to fig. 4, fig. 4 is a schematic structural diagram of an energy storage module according to an embodiment of the utility model.
In some embodiments, the energy storage module 5 comprises: and a battery manager 52 and a battery 51, the battery manager 52 being connected to both the battery 51 and the first bus bar 6, the battery manager 52 being configured to control the battery 51 to store electric energy in the first bus bar 6 or to control the battery 51 to discharge to output battery electric energy.
Among these, the battery 51 typically selects a lithium ion battery as an energy storage element. The battery manager 52 is configured to monitor and manage the battery 51. The battery manager 52 has a function of power conversion, and normally the battery manager 52 is a non-isolated DC-DC converter in which energy flows bi-directionally, and is capable of converting a direct-current voltage of the battery 51 into another direct-current voltage and transmitting the other direct-current voltage to the first bus 6 via the power cable 53, thereby stabilizing the voltage of the first bus 6. In addition, the battery manager 52 is configured with a communication link 54 through which the energy management module may communicate.
Referring to fig. 5, fig. 5 is a schematic structural diagram of a connection relationship of an energy management module according to an embodiment of the utility model.
The energy management module 10 is configured to obtain working information of the power module 2, the electricity reserve module 8, the new energy power generation module 9, the energy storage module 5 and the energy storage current transformation module 7, and control working states of the electricity reserve module 8, the energy storage module 5 and the energy storage current transformation module 7 according to the working information.
Specifically, the energy management module 10 communicates with the power module 2, the electricity reserve module 8, the energy storage current transformation module 7, the battery manager 52 of the energy storage module 5, the photovoltaic converter 92 of the new energy power generation module 9, and the wind power converter 94 of the new energy power generation module 9 through communication links, obtains working information thereof, and controls working states of the electricity reserve module 8, the energy storage module 5 and the energy storage current transformation module 7 according to the working information, so that the power supply system 100 continuously and stably supplies power to the load module 4.
The working information comprises information such as output power, input power, real-time power grid requirements, battery states and the like.
The operating state of the reserve power module 8 includes a state in which the reserve power module 8 acquires electric power from the second bus bar 3 to transmit to the first bus bar 6, or a state in which the reserve power module 8 acquires electric power from the first bus bar 6 to transmit to the second bus bar 3, or a state in which the reserve power module 8 does not operate.
The working state of the energy storage module 5 includes a state that the energy storage module 5 obtains electric energy from the first bus 6 to charge, or a state that the energy storage module 5 discharges to transmit the electric energy to the first bus 6, and a state that the energy storage module 5 does not work.
The working state of the energy storage current transformation module 7 comprises a state that the energy storage current transformation module 7 obtains electric energy from the power grid 1 and transmits the electric energy to the first bus 6, or a state that the energy storage current transformation module 7 obtains electric energy from the first bus 1 and transmits the electric energy to the power supply module 2, or a state that the energy storage current transformation module 7 does not work.
Referring to fig. 6, fig. 6 is a schematic structural diagram of a power supply system according to another embodiment of the utility model.
The power supply system 100 is not configured with the energy storage conversion module 7 and the new energy power generation module 9.
Specifically, the power module 2 converts ac power of the power grid 1 into dc power, and transmits the dc power to the load module 4 to supply power.
The energy storage module 5 is used for replacing a lead-acid battery to prepare electricity for the electricity storage module 8, and meanwhile, the energy storage module has a long-time energy storage function. The reserve power module 8 is a bi-directional power system, and electrical energy can flow bi-directionally between the energy storage module 5 and the power module 2 and the load module 4.
When the power supply module 2 stops supplying power due to a certain abnormal working condition, the reserve power module 8 triggers the standby power working state to replace the power supply module 2 to supply power to the load module 4.
The reserve module 8 can also be brought into a dispatch operating state by command. In the dispatch operating state, the power module 2 can charge and store energy to the energy storage module 5 through the power reserve module 8. The reserve power module 8 can also be discharged to work and supply power together with the power module 2, or completely replace the power module 2 to supply power to the load module 4, which is determined by actual load condition and dispatch power.
Referring to fig. 7, fig. 7 is a schematic structural diagram of a power supply system according to another embodiment of the utility model.
On the basis of the power supply system 100 of fig. 6, the new energy power generation module 9 may be configured to form the power supply system 100 as shown in fig. 7.
After the new energy power generation module 9 is introduced, the new energy power can be used for supplying power to the load module 4 through the power storage module 8. When the power consumed by the load module 4 or the scheduled transmission power of the reserve module 8 is smaller than the generated power, the electric energy flows to the energy storage module 5 for storage.
Referring to fig. 8, fig. 8 is a schematic structural diagram of a power supply system according to another embodiment of the utility model.
As shown in fig. 8, the power supply system 100 is provided with an energy storage conversion module 7, and is not provided with a new energy power generation module 9.
The power module 2 converts alternating current power of the power grid 1 into direct current power, and transmits the direct current power to the load module 4 for power supply.
The energy storage module 5 is used for replacing a lead-acid battery to prepare electricity for the electricity storage module 8, and meanwhile, the energy storage module has a long-time energy storage function. The reserve power module 8 is a unidirectional power supply system, and electric energy flows unidirectionally from the energy storage module 5 to the load module 4. The energy storage conversion module 7 charges the energy storage module 5 from the power grid 1, and the energy storage module 5 can participate in the functions of frequency modulation, voltage regulation and the like of the power grid through the energy storage conversion module 7.
When the power supply module 2 stops supplying power due to a certain abnormal working condition, the reserve power module 8 triggers the standby power working state to replace the power supply module 2 to supply power to the load module 4.
The reserve module 8 can also be brought into a dispatch operating state by command. In the dispatching working state, the reserve power module 8 can supply power together with the power module 2, and can also completely replace the power module 2 to supply power to the load module 4, and is specifically determined by the actual load condition and dispatching power.
Referring to fig. 9, fig. 9 is a schematic diagram illustrating a power flow direction of the power supply system in fig. 1.
The new energy power generation module 9 is introduced on the basis of the power supply system 100 shown in fig. 8, and the power supply system 100 shown in fig. 9 can be formed.
The new energy source electric energy can supply power for the load module 4 through the reserve electric module 8. When the power consumed by the load module 4 or the scheduled transmission power of the reserve module 8 is smaller than the generated power, the electrical energy flows to the energy storage module 5 for storage.
Referring to fig. 10, fig. 10 is a detailed structural schematic diagram of a power supply system according to an embodiment of the utility model.
In fig. 10, the power grid 1 includes a 10kV power grid 11, a 10kV power grid 12, and a 10kV power grid 13, and the 10kV power grid 11, the 10kV power grid 12, and the 10kV power grid 13 each output alternating current.
The power module 2 comprises two 240V direct current power supply systems, and the two 240V direct current power supply systems are mutually backed up and are used for converting alternating currents output by the 10kV power grid 11 and the 10kV power grid 12 into 240V direct currents and 380V three-phase alternating currents and transmitting the 240V direct currents and the 380V three-phase alternating currents to the second bus 3. The power consumption capacity of the 240V direct current power supply system is 1.6MW, the energy conversion efficiency of direct current output is 97%, and the energy conversion efficiency of alternating current output is 99%.
The second bus 3 includes a 240V dc bus and a 380V ac bus.
The load module 4 comprises first-class equipment and second-class equipment, wherein the first-class equipment mainly obtains electric energy from a 240V direct current bus, the electric capacity of the first-class equipment is 1.6MW, the second-class equipment mainly obtains electric energy from a 380V alternating current bus, and the electric capacity of the second-class equipment is 200kW.
The first bus 6 is a 1500V direct current bus, the first bus 6 is connected to the second bus 3 through the reserve power module 8, the first bus 6 is further connected with the 10kV power grid 13 through the energy storage converter 7, and the first bus 6 is further connected with the new energy power generation module 9 and the energy storage module 5.
The power reserve module 8 comprises two parallel unidirectional isolation DC-DC converters and two parallel unidirectional isolation DC-AC converters, wherein the two unidirectional isolation DC-DC converters are mutually backed up, and the two unidirectional isolation DC-AC converters are mutually backed up. The output ends of the two unidirectional isolation DC-DC converters are connected with a 240V direct current bus, the capacitance is 1.6MW, and the energy conversion efficiency is 98%. The output ends of the two unidirectional isolation DC-AC converters are connected with a 380V alternating current bus, the capacitance is 200kW, and the energy conversion efficiency is 96%.
The energy storage converter 7 can control the charging and discharging processes of the energy storage module 5 to perform alternating current-direct current conversion.
The electric energy of the first bus 6 can also be converted into alternating current through the energy storage converter 7 (PCS, power Conversion System), and the alternating current is boosted through the power frequency transformer and then is integrated into the 10kV power grid 13.
The energy storage module 5 is configured as a 3.44MWh lithium iron phosphate stack, which may be made up of 10 clusters, each cluster voltage 1228.8V, capacity 280Ah. Each battery cluster is provided with 160kW of bidirectional non-isolated DC-DC converters as an energy interaction interface with the first bus 6, the bidirectional non-isolated DC-DC converters also serve as the battery manager 52 between the battery clusters, the total power of the 10 battery clusters bidirectional non-isolated DC-DC converters is 1.6MW, and the energy conversion efficiency is 99%.
The new-energy power generation module 9 is configured as a 300kWp photovoltaic cell array as photovoltaic cells 91, which transfers photovoltaic power to the first bus 6 through a 200kW unidirectional non-isolated DC-DC converter. As the photovoltaic converter 92, a unidirectional non-isolated DC-DC converter was used, and the energy conversion efficiency of the unidirectional non-isolated DC-DC converter was 99%.
When the power supply system is built, the two 240V direct current power supply systems, the first equipment, the second equipment and the power storage module 8 are built in the building, so that a stable running environment is provided, and the stability of the power supply voltage of the power supply system can be guaranteed to the greatest extent. The lithium iron phosphate battery stack and the corresponding bidirectional non-isolated DC-DC converter are arranged on an outdoor site near a building where the power supply system is located in a container mode or are arranged in other independent buildings in a frame mode, isolation on physical distance is achieved, and operation safety of the power supply system is improved. The photovoltaic cell arrays are arranged at the corresponding building roofs, so that the space of the power supply system is fully utilized, and the green electricity proportion of the power supply system is improved. The new energy power generation module 9, the energy storage module 5 and the load module 4 can realize energy interaction through the first bus 6.
When the power supply system operates, the two 240V direct current power supply systems supply power for the load module 4, and the energy efficiency can reach 97%. The energy of photovoltaic power generation is preferentially supplied to first equipment, namely IT equipment, and the energy efficiency can reach 97%. When the load of the IT equipment is insufficient to consume photovoltaic power, the remaining photovoltaic power is determined by the energy management module 10 to be incorporated into the 10kV grid 13 via PCS or charged into the lithium iron phosphate stack according to information such as real-time grid demand, battery status, etc. The energy efficiency of the grid connection of the photovoltaic power generation can reach 97%, and the energy efficiency of the energy storage of the photovoltaic power generation can reach 98%. Similarly, the energy management module 10 may schedule the lithium iron phosphate battery stack to be incorporated into the 10kV power grid 13 through the PCS according to information such as real-time power grid requirements and battery status, and perform energy interaction with the 10kV power grid 13, or use the stored electric quantity to supply the first type of equipment and the second type of equipment to operate. The charging and discharging efficiency of the lithium iron phosphate battery stack to the power grid can reach 97%, and the energy efficiency can reach 97% when the lithium iron phosphate battery stack supplies power to first equipment.
When the two paths of 240V direct current power supply systems are abnormally powered off, the reserve power module 8, namely the two unidirectional isolation DC-DC converters and the two unidirectional isolation DC-AC converters, can rapidly respond to supply power for first-class equipment, namely IT equipment, and second-class equipment, namely air conditioning equipment, lighting equipment and the like.
From the viewpoint of energy conversion efficiency, the transmission efficiency of the energy path of the power supply system is mostly more than 97%. The traditional energy storage system and the data center power supply system are independently built, energy is required to be coupled through an alternating current power grid, and energy efficiency is lower than 94%, and compared with the energy efficiency of the power supply system provided by the embodiment is better.
From the viewpoint of construction cost, the power supply system multiplexes the energy storage module 5, and the energy storage module 5 can replace the diesel generator and the lead-acid storage battery of the traditional data center to store electricity for a long time and instantly prepare electricity for the power supply system of the data center when storing energy for the power grid, so that the construction cost of the system is reduced.
The power supply system provided by the embodiment of the utility model comprises: the system comprises a power grid, a reserve power module, an energy storage module, a load module, an energy management module, a power supply module and/or an energy storage conversion module; the power grid is connected with the power supply module and/or the energy storage conversion module, the power supply module and the electricity storage module are connected with the load module, the energy storage conversion module and the electricity storage module are connected with the energy storage module, and the power grid, the power supply module, the electricity storage module, the energy storage conversion module and the energy storage module are all in communication connection with the energy management module; the energy management module is used for scheduling the reserve power module, the energy storage module and the energy storage conversion module; the power supply module is used for converting alternating current of the power grid and outputting electric energy; the energy storage conversion module is used for acquiring electric energy from the power grid according to the dispatching of the energy management module or acquiring electric energy from the energy storage module; the energy storage module is used for acquiring electric energy to charge or discharging according to the dispatching of the energy management module so as to output the electric energy; the power reserve module is used for acquiring electric energy to supply power for the load module when the output of the power supply module is abnormal or the power supply module does not participate in power supply; and according to the scheduling of the energy management module, acquiring electric energy to charge the energy storage module when the output of the power supply module is normal, or acquiring electric energy from the energy storage module to supply power to the load module. The power supply system provided by the embodiment of the utility model can improve the energy utilization efficiency of renewable energy sources and energy storage elements and reduce the construction and operation cost of the system.
It should be noted that the description of the present utility model and the accompanying drawings illustrate preferred embodiments of the present utility model, but the present utility model may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, which are not to be construed as additional limitations of the utility model, but are provided for a more thorough understanding of the present utility model. The above-described features are further combined with each other to form various embodiments not listed above, and are considered to be the scope of the present utility model described in the specification; further, modifications and variations of the present utility model may be apparent to those skilled in the art in light of the foregoing teachings, and all such modifications and variations are intended to be included within the scope of this utility model as defined in the appended claims.
Claims (12)
1. A power supply system, characterized in that the power supply system comprises: the system comprises a power grid, a reserve power module, an energy storage module, a load module, an energy management module, a power supply module and/or an energy storage conversion module;
the power grid is connected with the power supply module and/or the energy storage conversion module, the power supply module and the electricity storage module are connected with the load module, the energy storage conversion module and the electricity storage module are connected with the energy storage module, and the power grid, the power supply module, the electricity storage module, the energy storage conversion module and the energy storage module are all in communication connection with the energy management module;
the energy management module is used for scheduling the reserve power module, the energy storage module and the energy storage conversion module;
the power supply module is used for converting alternating current of the power grid and outputting electric energy;
the energy storage conversion module is used for acquiring electric energy from the power grid according to the dispatching of the energy management module or acquiring electric energy from the energy storage module;
the energy storage module is used for acquiring electric energy to charge or discharging according to the dispatching of the energy management module so as to output the electric energy;
the power reserve module is used for acquiring electric energy to supply power for the load module when the output of the power supply module is abnormal or the power supply module does not participate in power supply; and according to the scheduling of the energy management module, acquiring electric energy to charge the energy storage module when the output of the power supply module is normal, or acquiring electric energy from the energy storage module to supply power to the load module.
2. The power supply system of claim 1, further comprising:
the storage power module, the energy storage module and the energy storage conversion module are connected with the first bus, and the first bus is used for transmitting electric energy among the storage power module, the energy storage module and the energy storage conversion module.
3. The power supply system according to claim 2, further comprising a new energy power generation module, wherein the new energy power generation module is connected to the reserve power module or/and the energy storage module through the first bus, and the new energy power generation module is configured to perform new energy power generation according to the schedule of the energy management module so as to output new energy power.
4. A power supply system according to claim 3, characterized in that the new energy source power is supplied to the load module via the reserve power module.
5. The power supply system according to claim 4, wherein the new energy power is further used for being stored by the energy storage module or/and being transmitted to the power grid through the energy storage conversion module when the new energy power is greater than the power required by the load module.
6. The power supply system according to claim 1, wherein the energy storage converter module is specifically configured to obtain, according to the schedule of the energy management module, electric energy of the power grid and transmit the electric energy to the energy storage module and/or the power reserve module, or enable the energy storage module to output electric energy to the power grid so as to perform frequency modulation and voltage regulation on the power grid.
7. The power supply system according to claim 1, wherein the power grid comprises one power grid, or a plurality of independent power grids, each connected to a power supply module or/and an energy storage conversion module.
8. The power supply system according to any one of claims 1 to 7, characterized in that the power supply system further comprises:
the power module, the reserve power module and the load module are all connected with the second bus, and the second bus is used for transmitting electric energy among the power module, the reserve power module and the load module.
9. The power supply system according to any one of claims 3 to 5, wherein the new energy power generation module includes:
the photovoltaic power generation unit or/and the wind power generation unit is connected with the first bus;
the photovoltaic power generation unit is used for carrying out photovoltaic power generation and outputting photovoltaic electric energy;
the wind power generation unit is used for wind power generation and outputting wind power energy.
10. The power supply system according to claim 9, wherein the photovoltaic power generation unit includes:
photovoltaic cells and photovoltaic inverters;
the photovoltaic converter is connected with the photovoltaic cell and the first bus;
the photovoltaic converter is used for converting electric energy generated by the photovoltaic cell into photovoltaic electric energy.
11. The power supply system according to claim 9, wherein the wind power generation unit comprises:
a wind power generator and a wind power converter;
the wind power converter is connected with the wind power generator and the first bus;
the wind power converter is used for converting electric energy generated by the wind driven generator into wind power energy.
12. The power supply system of claim 8, wherein the second bus comprises at least one set of dc buses, optionally at least one set of ac buses,
the power module, the reserve power module and the load module are all connected with the at least one group of direct current buses, and the power module, the reserve power module and the load module are all connected with the at least one group of alternating current buses;
the at least one set of direct current buses are used for transmitting direct current;
the at least one set of ac busbars is for transmitting ac power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320253003.0U CN219477604U (en) | 2023-02-17 | 2023-02-17 | Power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320253003.0U CN219477604U (en) | 2023-02-17 | 2023-02-17 | Power supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219477604U true CN219477604U (en) | 2023-08-04 |
Family
ID=87435186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320253003.0U Active CN219477604U (en) | 2023-02-17 | 2023-02-17 | Power supply system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219477604U (en) |
-
2023
- 2023-02-17 CN CN202320253003.0U patent/CN219477604U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11532947B2 (en) | Combination wind/solar DC power system | |
| US6949843B2 (en) | Grid-connected power systems having back-up power sources and methods of providing back-up power in grid-connected power systems | |
| WO2017142218A1 (en) | Energy storage system and system operating method | |
| CN105811458A (en) | Microgrid energy storage system and energy management method thereof | |
| CN108695870B (en) | Charging and energy storage integrated system | |
| US11277008B2 (en) | Energy storage system | |
| CN111231713A (en) | Electric automobile charging and discharging system and control method | |
| KR102421893B1 (en) | Energy storage system | |
| CN111293777A (en) | Uninterrupted power supply system and method for multi-station fusion in power operation | |
| KR20190062812A (en) | An energy storage system | |
| CN112510768A (en) | Power supply system | |
| CN117458556A (en) | New energy micro-grid power station operation system and method | |
| CN219477604U (en) | Power supply system | |
| KR102257906B1 (en) | An energy storage system | |
| CN107769189B (en) | DC micro-grid structure | |
| CN216355990U (en) | Intelligent building multifunctional energy storage system | |
| KR101648804B1 (en) | Energy storage system having a structure that a plurality of battery system is distributed and method for processing thereof | |
| KR102463396B1 (en) | Energy storage system | |
| CN114899870A (en) | Alternating current-direct current hybrid micro-grid system and control method | |
| KR102389302B1 (en) | An energy storage system | |
| KR101216703B1 (en) | Eco-friendly electric vehicle charging system | |
| CN112865106A (en) | AC/DC hybrid micro-grid power scheduling method considering charge state | |
| CN116231833B (en) | Multi-energy coupling non-disturbance uninterrupted AC/DC power supply system | |
| CN220234208U (en) | AC/DC double bus power exchange station | |
| CN111406352B (en) | energy storage system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |