CN219372035U - Power supply system - Google Patents
Power supply system Download PDFInfo
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- CN219372035U CN219372035U CN202320250975.4U CN202320250975U CN219372035U CN 219372035 U CN219372035 U CN 219372035U CN 202320250975 U CN202320250975 U CN 202320250975U CN 219372035 U CN219372035 U CN 219372035U
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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
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Abstract
The application provides a power supply system, including: the photovoltaic system comprises a photovoltaic array, a power supply module and an energy storage module; the photovoltaic array is connected with the power supply module and is used for providing a photovoltaic power supply; the power supply module is connected with a power grid and the energy storage module, the power grid is used for providing a commercial power supply, and the power supply module is used for charging the energy storage module based on the photovoltaic power supplied by the photovoltaic array or the commercial power supplied by the power grid; the power supply module is connected with a load and is further used for supplying power to the load based on the mains supply or the energy storage power supply provided by the energy storage module. The method solves the problem of unstable power supply in the prior art.
Description
Technical Field
The application relates to the field of energy, in particular to a power supply system.
Background
Photovoltaic power generation is a technology that uses the photovoltaic effect of a semiconductor interface to directly convert light energy into electrical energy. Compared with the limited conventional energy, the solar energy is inexhaustible renewable energy for human beings, so that the photovoltaic power generation has the advantages of no exhaustion risk, safety, reliability, no pollution emission and the like compared with the conventional thermal power generation system.
In the prior art, the main mode of utilizing photovoltaic power is to directly supply power to a load by using the photovoltaic power and the commercial power simultaneously, and the problem of unstable power supply exists because the photovoltaic power generation is greatly influenced by weather and the commercial power has the unstable voltage.
Disclosure of Invention
The application provides a power supply system for solve the unstable problem of prior art power supply.
In one aspect, the present application provides a power supply system, including: the photovoltaic system comprises a photovoltaic array, a power supply module and an energy storage module;
the photovoltaic array is connected with the power supply module and is used for providing a photovoltaic power supply;
the power supply module is connected with a power grid and the energy storage module, the power grid is used for providing a commercial power supply, and the power supply module is used for charging the energy storage module based on the photovoltaic power supplied by the photovoltaic array or the commercial power supplied by the power grid;
the power supply module is connected with a load and is further used for supplying power to the load based on the mains supply or the energy storage power supply provided by the energy storage module.
In a possible implementation manner, the power supply module includes: an energy storage control unit and a power supply unit;
the energy storage control unit is connected with the power grid and the photovoltaic array, and is used for generating a charging signal based on the photovoltaic power supply or the mains supply and transmitting the charging signal to the energy storage module for charging;
the power supply unit is connected with the power grid, the energy storage module and the load and is used for outputting the mains supply or the energy storage power supply provided by the energy storage module to the load so as to supply power to the load.
In a possible implementation manner, the energy storage control unit includes: the device comprises a first control unit, a first change-over switch and a rectifying unit;
the first end of the first change-over switch is connected with the photovoltaic array, the second end of the first change-over switch is connected with the power grid, and the third end of the first change-over switch is connected with the input end of the rectifying unit;
the first change-over switch is connected with the control unit and is used for conducting connection from a first end to a third end of the first change-over switch or connection from a second end to the third end of the first change-over switch under the control of the first control unit so as to transmit the photovoltaic power supply or the mains supply to the rectifying unit;
the output end of the rectifying unit is connected with the energy storage module and is used for rectifying the received mains supply or the received photovoltaic power supply to obtain the charging signal and outputting the charging signal to the energy storage module.
In one possible implementation manner, the number of the first change-over switches and the number of the rectifying units are multiple, and the first change-over switches and the rectifying units are in one-to-one correspondence.
In a possible implementation manner, the photovoltaic array includes a plurality of subarrays, and the subarrays are in one-to-one correspondence with the first switches; the first end of each first change-over switch is connected with the corresponding subarray.
In a possible implementation manner, the power supply system further comprises a temperature detection module, wherein the temperature detection module is used for detecting the temperature of the photovoltaic array;
the first control unit is connected with the temperature detection module and is further used for controlling the first change-over switch corresponding to any subarray to disconnect the connection from the first end to the third end of the first change-over switch when the temperature of any subarray is higher than a first preset temperature.
In a possible implementation manner, the power supply unit includes: the second control unit, the inversion unit and the second change-over switch;
the input end of the inversion unit is connected with the energy storage module, and the output end of the inversion unit is connected with the first end of the second change-over switch; the inversion unit is used for converting the energy storage power supply output by the energy storage module into alternating current;
the second end of the second change-over switch is connected with the power grid, and the third end of the second change-over switch is connected with the load; the second change-over switch is connected with the second control unit and is used for conducting connection from the first end to the third end of the second change-over switch or connection from the second end to the third end of the second change-over switch under the control of the second control unit so as to transmit the mains supply or the alternating current as a power supply signal to the load.
In a possible implementation manner, the temperature detection module is further configured to detect a temperature of the inverter unit;
the temperature detection module is connected with the second control unit, and the first control unit is further used for controlling the first change-over switch to be disconnected when the temperature of the inversion unit is higher than a second preset temperature; the second control unit is further used for controlling the second change-over switch to be switched off when the temperature of the inversion unit is higher than a second preset temperature.
In a possible implementation manner, the system further comprises a switch module;
the switch module comprises a plurality of switches, and the plurality of switches are in one-to-one correspondence with a plurality of loads;
one end of each switch is connected with the third end of the second change-over switch, and the other end of each switch is connected with a load corresponding to the switch.
In one possible implementation, the energy storage module includes a plurality of energy storage cells connected in series.
The power supply system comprises a photovoltaic array, a power supply module and an energy storage module, wherein the photovoltaic array is connected with the power supply module and is used for providing a photovoltaic power supply; the power supply module is connected with the power grid and the energy storage module, the power grid is used for providing a commercial power supply, and the power supply module is used for charging the energy storage module based on a photovoltaic power supply provided by the photovoltaic array or the commercial power supply provided by the power grid; the power supply module is connected with the load and is also used for supplying power to the load based on the mains supply or the energy storage power supply provided by the energy storage module. The photovoltaic power or the commercial power is input into the energy storage battery through the power supply module to be stored, and the electric energy or the commercial power stored by the energy storage battery is used for supplying power to a load, so that the energy storage battery can be charged when the illumination intensity or the commercial power price is in the valley time electricity price, the electric energy is stored, and the electric energy is switched to the energy storage battery for supplying power when the commercial power is unstable or the electric power price is in the peak time electricity price, thereby improving the utilization efficiency of a power supply, reducing the electricity cost and improving the power supply stability.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.
Fig. 1 schematically illustrates a structural diagram of a power supply system according to a first embodiment of the present application;
fig. 2 schematically illustrates a structural diagram of another power supply system according to the first embodiment of the present application;
fig. 3 is a schematic structural diagram of a power supply system according to a second embodiment of the present application;
fig. 4 is a schematic structural diagram of a power supply system according to a third embodiment of the present application;
fig. 5 is a schematic diagram schematically illustrating a structure of a power supply system according to a fourth embodiment of the present application;
fig. 6 is a schematic structural diagram of a power supply system according to a fourth embodiment of the present application.
Description of the reference numerals
10-a power supply system;
a 100-photovoltaic array;
110-a first sub-array;
120-a second sub-array;
200-a power supply module;
210-an energy storage control unit;
211-a first control unit;
212-a first switch;
213-rectifying unit;
220-a power supply unit;
221-a second control unit;
222-an inversion unit;
223-a second switch;
300-an energy storage module;
400-a temperature detection module;
500-a switch module;
20-an electric grid;
30-load.
Specific embodiments thereof have been shown by way of example in the drawings and will herein be described in more detail. These drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present application as detailed in the accompanying claims.
Photovoltaic power generation is a technology that uses the photovoltaic effect of a semiconductor interface to directly convert light energy into electrical energy. Compared with the limited conventional energy, the solar energy is inexhaustible renewable energy for human beings, so that the photovoltaic power generation has the advantages of no exhaustion risk, safety, reliability, no pollution emission and the like compared with the conventional thermal power generation system.
In the prior art, the main mode of utilizing photovoltaic power is to directly supply load power supply by using photovoltaic power and commercial power simultaneously, and because photovoltaic power generation is greatly influenced by weather, for example, in overcast and rainy days, the electric quantity generated by photovoltaic power generation is very low due to insufficient illumination, and the commercial power has the condition of unstable voltage, so the problem of unstable power supply exists.
The technical solutions of the present application are illustrated in the following specific examples. The following embodiments may be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.
Example 1
Fig. 1 is a schematic structural diagram of a power supply system according to an embodiment of the present application. As shown in fig. 1, the power supply system 10 provided in the present embodiment includes: photovoltaic array 100, power module 200, and energy storage module 300;
the photovoltaic array 100 is connected with the power supply module 200, and the photovoltaic array 100 is used for converting solar energy into electric energy to provide a photovoltaic power supply.
In practice, the photovoltaic array may include a plurality of solar cell modules that can convert solar energy into dc electrical energy by photovoltaic effect, and the plurality of solar cell modules are connected together to form the array to generate sufficient electrical energy.
The photovoltaic array 100 is connected with the power supply module 200, and the photovoltaic array 100 is used for providing a photovoltaic power supply;
the power supply module 200 is connected with the power grid 20 and the energy storage module 300, the power grid 20 is used for providing a commercial power supply, and the power supply module 200 is used for charging the energy storage module 300 based on the photovoltaic power supplied by the photovoltaic array 100 or the commercial power supplied by the power grid 20;
the power supply module 200 is connected to the load 30, and the power supply module 200 is further configured to supply power to the load 30 based on the mains power or the energy storage power provided by the energy storage module 300.
Fig. 2 is a schematic structural diagram of another power supply system according to an embodiment of the present application. As shown in fig. 2, in one example, power module 200 may include: an energy storage control unit 210 and a power supply unit 220;
the energy storage control unit 210 is connected to the power grid 20, the photovoltaic array 100 and the energy storage module 300, and the energy storage control unit 210 is configured to charge the energy storage module 300. The charging mode comprises the following steps: charging the energy storage module 300 based on the photovoltaic power provided by the photovoltaic array 100 or charging the energy storage module 300 based on the mains power provided by the grid 20;
in practical applications, the energy storage control unit 210 may select which charging mode is used to charge the energy storage module 300 according to the actual production situation. In one example, when in the off-peak electricity price period, the energy storage control unit 210 charges the energy storage module 300 with mains power; when the peak-time electricity price period is in, the energy storage control unit 210 charges the energy storage module 300 using a photovoltaic power source to achieve maximum economic benefit.
The power supply unit 220 is connected to the power grid 20, the energy storage module 300 and the load 30, and the power supply unit 220 is used for supplying power to the load 30. The power supply mode comprises the following steps: the load 30 is supplied based on the mains power provided by the grid 20 or the load 30 is supplied based on the stored energy power provided by the energy storage module 300.
In practical applications, the power supply unit 220 may select which power source is used to supply power to the load 30 according to actual production conditions. In one example, when in the off-peak power rate period, the power supply unit 220 employs mains power to power the load 30; when the peak-time electricity price period or the mains voltage is unstable, the power supply unit 220 supplies the load 30 with the electric energy stored by the energy storage module 300.
In one example, the energy storage module may include a plurality of energy storage batteries connected in series, and may implement charging and discharging functions under the control of the power supply module, where specific specifications and models may be selected according to actual production requirements.
In the above technical solution, the photovoltaic power source is generated by the photovoltaic array 100, the power supply module 200 charges the energy storage module based on the photovoltaic power source provided by the photovoltaic array 100 or the mains power source provided by the power grid 20, and supplies power to the load 30 based on the mains power source or the energy storage power source provided by the energy storage module 300, the power supply module 200 charges the energy storage module 300 by using two charging power sources, namely the photovoltaic power source and the mains power source, to obtain the energy storage power source, and uses two power sources, namely the energy storage power source and the mains power source, to supply power to the load, so as to effectively improve the reliability of power supply, wherein the power supply module 200 may include the energy storage control unit 210 and the power supply unit 220, and respectively perform the charging and discharging functions.
The power supply system provided by the embodiment comprises a photovoltaic array, a power supply module and an energy storage module, wherein the photovoltaic array is connected with the power supply module and is used for providing a photovoltaic power supply; the power supply module is connected with the power grid and the energy storage module, the power grid is used for providing a commercial power supply, and the power supply module is used for charging the energy storage module based on a photovoltaic power supply provided by the photovoltaic array or the commercial power supply provided by the power grid; the power supply module is connected with the load and is also used for supplying power to the load based on the mains supply or the energy storage power supply provided by the energy storage module. The photovoltaic power or the commercial power is input into the energy storage battery through the power supply module to be stored, and the electric energy or the commercial power stored by the energy storage battery is used for supplying power to a load, so that the energy storage battery can be charged when the illumination intensity or the commercial power price is in the valley time electricity price, the electric energy is stored, and the electric energy is switched to the energy storage battery for supplying power when the commercial power is unstable or the electric power price is in the peak time electricity price, thereby improving the utilization efficiency of a power supply, reducing the electricity cost and improving the power supply stability.
Example two
Fig. 3 is a schematic structural diagram of a power supply system according to an embodiment of the present application. As shown in fig. 3, the power supply system 10 provided in this embodiment includes: the photovoltaic array 100, the energy storage control unit 210, the power supply unit 220 and the energy storage module 300;
the photovoltaic array 100 and the energy storage module 300 are as described above, and are not described herein.
The energy storage control unit 210 includes a first control unit 211, a first switch 212, and a rectifying unit 213;
a first end of the first switch 212 is connected with the photovoltaic array 100, a second end of the first switch 212 is connected with a power grid, and a third end of the first switch 212 is connected with an input end of the rectifying unit 213;
the first switch 212 is connected to the first control unit 211, and the first switch 212 is configured to conduct a connection from a first end to a third end of the first switch 212 or a connection from a second end to the third end of the first switch 212 under the control of the first control unit 211, so as to transmit the photovoltaic power or the commercial power to the rectifying unit 213;
the output end of the rectifying unit 213 is connected to the energy storage module 300, and is used for rectifying the received commercial power or photovoltaic power to obtain direct current and outputting the direct current to the energy storage module 300.
The rectifying unit 213 may be a rectifying circuit or a rectifier as long as it can convert alternating current into direct current. When the rectifying unit 213 is a rectifier, the rectifier may be made of a vacuum tube, a pilot tube, a solid silicon semiconductor diode, a mercury arc, etc., and the specific specification and model may be selected according to actual needs.
When the rectifying unit 213 is a rectifying circuit, the rectifying circuit may be composed of a transformer, a rectifying main circuit, a filter, etc., or may be composed of a silicon rectifying diode and a thyristor, and may be specifically selected according to actual needs, which is not limited in this application.
The first control unit 211 may obtain the illumination intensity information, and control the first switch 212 according to the illumination intensity information. In a possible implementation, the first control unit 211 is connected to the photovoltaic array 100, and obtains illumination intensity information from the photovoltaic array 100, where an illumination sensor is disposed in the photovoltaic array 100 to detect illumination intensity. When the illumination intensity reaches the preset illumination threshold, the connection from the first end to the third end of the first switch 212 is turned on, and the photovoltaic power is transmitted to the rectifying unit 213.
The power supply unit 220 includes: a second control unit 221, an inverter unit 222, and a second change-over switch 223;
an input end of the inversion unit 222 is connected with the energy storage module 300, and an output end of the inversion unit 222 is connected with a first end of the second change-over switch 223; the inverter unit 222 is configured to convert the energy storage power outputted by the energy storage module 300 into ac power;
a second end of the second change-over switch 223 is connected with a power grid, and a third end of the second change-over switch 223 is connected with a load; the second switch 223 is connected to the second control unit 221, and is configured to conduct connection from the first end to the third end of the second switch 223 or connection from the second end to the third end of the second switch 223 under control of the second control unit 221, so as to transmit ac power obtained by processing the mains power supply or the inverter unit 222 to the load for supplying power.
The inverter unit 222 may be an inverter circuit as long as it can convert direct current into alternating current. When the inverter unit 222 is an inverter circuit, the inverter circuit may be composed of an inverter bridge, a control logic, a filter circuit, or may be composed of a silicon inverter diode and a thyristor, which may be specifically selected according to actual needs, and the application is not limited.
Wherein, the first control unit 211 and the second control unit 221 store therein electricity rate period information including electricity rates corresponding to respective periods. Table 1 shows the electricity rate period information provided in this embodiment, and as shown in Table 1, in one example, the electricity rates at 6:00-8:00, 11:00-13:00, and 15:00-18:00 are the average electricity rates, and the electricity rates at 8:00-11:00, 13:00-15:00, and 18:00-22:00 are the peak electricity rates, and the electricity rates at 0:00-6:00, and 22:00-24:00 are the average electricity rates.
Table 1 electricity rate period information
The first control unit 211 turns on the connection from the first end to the third end of the first switch 212 when the illumination intensity reaches the preset illumination threshold and the time period of the usual level and the peak time level are reached, so that the energy storage control unit 210 charges the energy storage module 300 by using the photovoltaic power supply; when the illumination intensity reaches the preset illumination threshold and is in the valley electricity price period, the connection from the second end to the third end of the first change-over switch 212 is conducted, so that the energy storage control unit 210 charges the energy storage module 300 by adopting the mains supply;
the second control unit 221 turns on the connection of the second end to the third end of the second switching switch 223 at the peak electricity rate period, so that the power supply unit 220 supplies power to the load 30 using the energy storage power source; at the time of the normal power rate period or the off-time power rate period, the connection of the first terminal to the third terminal of the second changeover switch 223 is turned on so that the power supply unit 220 supplies power to the load 30 using the mains power.
In practical applications, the first switch 212 and the second switch 223 are not limited in selection, and in order to achieve the power switching to achieve the uninterrupted power supply effect, in one possible implementation, an STS static switch may be selected, which is not limited herein.
In the above technical solution, the photovoltaic array 100 generates a photovoltaic power source, and the first switch 212 transmits the photovoltaic power source or the commercial power source to the rectifying unit 213 under the control of the first control unit 211 in the energy storage control unit 210; after rectifying unit 213 performs rectifying processing, the direct current obtained by the processing is input into energy storage module 300, so as to realize two charging modes of photovoltaic charging and mains charging. In the power supply unit 220, the inverter unit 222 performs inverter processing on the energy storage power source output by the energy storage module 300, and outputs alternating current; the second switch 223 transmits the alternating current or the mains supply output by the inverter unit 222 to the load for power supply under the control of the second control unit 221, so as to implement two power supply modes of energy storage power supply and mains supply.
In the power supply system provided in this embodiment, the energy storage control unit includes: the device comprises a first control unit, a first change-over switch and a rectifying unit; the first switching switch is used for transmitting the photovoltaic power supply or the mains supply to the rectifying unit under the control of the first control unit; the rectification unit is used for rectifying the received mains supply or photovoltaic power supply to obtain a charging signal and outputting the charging signal to the energy storage module. The power supply unit includes: the second control unit, the inversion unit and the second change-over switch; the inversion unit is used for converting the energy storage power supply output by the energy storage module into alternating current; the second change-over switch is used for transmitting the mains supply or the alternating current to the load as a power supply signal under the control of the second control unit. The charging mode of the energy storage module is controlled through the first control unit, and the power supply mode of the load is controlled through the second control unit, so that a stable charging power supply and a stable power supply are provided, the power supply reliability is effectively improved, and meanwhile, the power consumption cost is reduced.
Example 3
Fig. 4 is a schematic structural diagram of a power supply system according to an embodiment of the present application. As shown in fig. 4, the power supply system 10 provided in this embodiment includes: the photovoltaic array 100, the first control unit 211, the first switching switch 212, the rectifying unit 213, the second control unit 221, the inverter unit 222, the second switching switch 223, the energy storage module 300, and the temperature detection module 400;
the inverter unit 222, the second switch 223, and the energy storage module 300 are as described above, and are not described herein.
The photovoltaic array 100 may be divided into a plurality of sub-arrays, which may be selected according to the actual production requirements, and is not limited thereto.
The number of the first switch 212 may be plural, and the first terminal of one first switch is connected to one sub-array.
The number of rectifying units 213 may be plural, and one rectifying unit is connected to one first switching switch.
In this embodiment, the photovoltaic array 100 is divided into 2 sub-arrays, namely, the first sub-array 110 and the second sub-array 120. Correspondingly, the power supply system 10 includes 2 first switches 212 and 2 rectifying units 213.
The temperature detection module 400 is used for detecting the temperature of the photovoltaic array 100;
the first control unit 211 is connected to the temperature detection module 400, and is further configured to control the first switch 212 corresponding to any one of the sub-arrays to disconnect the connection from the first end to the third end of the first switch when the temperature of the sub-array is higher than a first preset temperature.
As an example, when the first control unit 211 is in the flat-level period and the temperature of the first sub-array 110 is higher than the first preset temperature, the first switch 212 corresponding to the first sub-array 110 is controlled to conduct the connection from the second end to the third end of the first switch 212, and disconnect the connection from the first end to the third end of the first switch 212, so that the energy storage control module 200 disconnects the sub-array with the excessively high temperature and charges the energy storage module 300 with the mains supply. And the safety is ensured, and meanwhile, the maximum economic benefit is provided.
The temperature detection module 400 is further configured to detect a temperature of the inverter unit 222;
the temperature detection module 400 is connected to the second control unit 221, the first control unit 211 is further configured to control the first switch 212 to be turned off when the temperature of the inverter unit 222 is higher than a second preset temperature, and the second control unit 221 is further configured to control the second switch 223 to be turned off when the temperature of the inverter unit 222 is higher than the second preset temperature.
The temperature detection module 400 is connected to the second control unit 221, the first control unit is further configured to control the first switch 212 to be turned off when the temperature of the inverter unit 222 is higher than a second preset temperature, and the second control unit 221 is further configured to control the second switch 223 to be turned off when the temperature of the inverter unit 222 is higher than the second preset temperature.
In the above technical solution, the temperature detection module 400 is configured to detect temperatures of the photovoltaic array 100 and the inverter unit 222; when the temperature of any one of the subarrays of the photovoltaic array 100 is higher than a first preset temperature, the first control unit 211 controls the first switch 212 corresponding to the subarray to disconnect the connection with the subarray; the first control unit 211 and the second control unit 221 respectively control all the first switch 212 to be disconnected from the second switch 223 when the temperature of the inverter unit 222 is higher than the second preset temperature.
The power supply system provided by the embodiment further comprises a temperature detection module, wherein the temperature detection module is used for detecting the temperature of the photovoltaic array; the first control unit is connected with the temperature detection module and is further used for controlling the first change-over switch corresponding to any subarray to disconnect the connection from the first end to the third end of the first change-over switch when the temperature of any subarray is higher than a first preset temperature, so that the system safety is ensured and the electricity cost is reduced. The temperature detection module is also used for detecting the temperature of the inversion unit; the first control unit and the second control unit are respectively connected with the temperature detection module and are used for controlling the first change-over switch to be disconnected with the second change-over switch when the temperature of the inversion unit is higher than a second preset temperature, so that the system and the power supply safety are protected.
Example IV
Fig. 5 is a schematic structural diagram of a power supply system according to an embodiment of the present application. As shown in fig. 5, the power supply system 10 provided in the present embodiment includes: the photovoltaic array 100, the first control unit 211, the first switching switch 212, the rectifying unit 213, the second control unit 221, the inverter unit 222, the second switching switch 223, the energy storage module 300, and the temperature detection module 400;
the photovoltaic array 100, the first control unit 211, the first switch 212, the rectifying unit 213, the inverter unit 222, the second switch 223, the energy storage module 300, and the temperature detection module 400 are as described above, and are not described herein.
The second control unit 221 is connected with the power grid 20 and the energy storage module 300; the second control unit 221 comprises voltage detection means for detecting the voltage of the mains supply provided by the grid 20 and the stored energy supply provided by the energy storage module 300. When the mains voltage is lower than a preset first voltage threshold, the second control unit 221 controls the second switch 223 to disconnect the connection from the second end to the third end of the second switch 223, and turns on the connection from the first end to the third end of the second switch 223; when the energy storage voltage (e.g., the energy storage battery voltage) is lower than a preset second voltage threshold, the second switch 223 is controlled to disconnect the connection from the first end to the third end of the second switch 223, and to connect the second end to the third end of the second switch 223.
In the above-mentioned technical solution, the second control unit 221 detects the voltage of the mains supply provided by the power grid 20 and the voltage of the energy storage power provided by the energy storage module 300, and controls the second switch 223, so that the power supply unit 220 uses the energy storage power to supply power to the load 30 when the mains supply voltage is lower than a preset first voltage threshold, and uses the mains supply voltage to supply power to the load 30 when the energy storage voltage is lower than a preset second voltage threshold.
In the power supply system provided in this embodiment, the second control unit detects the voltage of the mains supply provided by the power grid and the energy storage power provided by the energy storage module, and when the mains supply voltage is lower than a preset first voltage threshold value, controls the second switch 223 to disconnect the mains supply and connect with the energy storage power; when the energy storage voltage is lower than a preset second voltage threshold value, the second change-over switch is controlled to be disconnected with the energy storage power supply and connected with the mains supply, so that sufficient power is provided for a load, and the power supply stability is improved.
Example five
Fig. 6 is a schematic structural diagram of a power supply system according to an embodiment of the present application. As shown in fig. 6, the power supply system 10 provided in the present embodiment includes: the photovoltaic array 100, the first control unit 211, the first switching switch 212, the rectifying unit 213, the second control unit 221, the inverter unit 222, the second switching switch 223, the energy storage module 300, and the switch module 500;
the photovoltaic array 100, the first control unit 211, the first switch 212, the rectifying unit 213, the second control unit 221, the inverter unit 222, the second switch 223, and the energy storage module 300 are as described above, and are not described herein.
The switch module 500 comprises a plurality of switches, and the plurality of switches are in one-to-one correspondence with a plurality of loads; one end of each switch is connected to the third end of the second switch 223, and the other end of each switch is connected to the load 30 corresponding to the switch.
In the above scheme, the switch module 500 provides multiple power outputs to the load. Specifically, each switch is responsible for controlling whether the load corresponding to the power supply is powered, that is, the power supply path of each load is independently controlled.
The power supply system provided by the embodiment further comprises a switch module, the switch module comprises multiple switches, the number of the switches is increased, the power supply system is enabled to supply power to the rear-end load through multiple outputs, power supply isolation among different loads is achieved, the influence of abnormal power supply of a single load on other loads is avoided, and the stability and reliability of power supply are further improved.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the utility model disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It is to be understood that the present application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (10)
1. A power supply system, comprising: the photovoltaic system comprises a photovoltaic array, a power supply module and an energy storage module;
the photovoltaic array is connected with the power supply module and is used for providing a photovoltaic power supply;
the power supply module is connected with a power grid and the energy storage module, the power grid is used for providing a commercial power supply, and the power supply module is used for charging the energy storage module based on the photovoltaic power supplied by the photovoltaic array or the commercial power supplied by the power grid;
the power supply module is connected with a load and is further used for supplying power to the load based on the mains supply or the energy storage power supply provided by the energy storage module.
2. The system of claim 1, wherein the power module comprises: an energy storage control unit and a power supply unit;
the energy storage control unit is connected with the power grid and the photovoltaic array, and is used for generating a charging signal based on the photovoltaic power supply or the mains supply and transmitting the charging signal to the energy storage module for charging;
the power supply unit is connected with the power grid, the energy storage module and the load and is used for outputting the mains supply or the energy storage power supply provided by the energy storage module to the load so as to supply power to the load.
3. The system of claim 2, wherein the energy storage control unit comprises: the device comprises a first control unit, a first change-over switch and a rectifying unit;
the first end of the first change-over switch is connected with the photovoltaic array, the second end of the first change-over switch is connected with the power grid, and the third end of the first change-over switch is connected with the input end of the rectifying unit;
the first change-over switch is connected with the first control unit, and is used for conducting connection from a first end to a third end of the first change-over switch or connection from a second end to the third end of the first change-over switch under the control of the first control unit so as to transmit the photovoltaic power supply or the commercial power supply to the rectifying unit;
the output end of the rectifying unit is connected with the energy storage module and is used for rectifying the received mains supply or the received photovoltaic power supply to obtain the charging signal and outputting the charging signal to the energy storage module.
4. The system of claim 3, wherein the number of the first switches and the rectifying units is plural, and the first switches and the rectifying units are in one-to-one correspondence.
5. The system of claim 4, wherein the photovoltaic array comprises a plurality of sub-arrays, the plurality of sub-arrays in one-to-one correspondence with the plurality of first switching switches; the first end of each first change-over switch is connected with the corresponding subarray.
6. The system of claim 5, wherein the power supply system further comprises a temperature detection module for detecting a temperature of the photovoltaic array;
the first control unit is connected with the temperature detection module and is further used for controlling the first change-over switch corresponding to any subarray to disconnect the connection from the first end to the third end of the first change-over switch when the temperature of any subarray is higher than a first preset temperature.
7. The system of claim 6, wherein the power supply unit comprises: the second control unit, the inversion unit and the second change-over switch;
the input end of the inversion unit is connected with the energy storage module, and the output end of the inversion unit is connected with the first end of the second change-over switch; the inversion unit is used for converting the energy storage power supply output by the energy storage module into alternating current;
the second end of the second change-over switch is connected with the power grid, and the third end of the second change-over switch is connected with the load; the second change-over switch is connected with the second control unit and is used for conducting connection from the first end to the third end of the second change-over switch or connection from the second end to the third end of the second change-over switch under the control of the second control unit so as to transmit the mains supply or the alternating current as a power supply signal to the load.
8. The system of claim 7, wherein the temperature detection module is further configured to detect a temperature of the inverter unit;
the temperature detection module is connected with the second control unit, the first control unit is further used for controlling the first change-over switch to be disconnected when the temperature of the inversion unit is higher than a second preset temperature, and the second control unit is further used for controlling the second change-over switch to be disconnected when the temperature of the inversion unit is higher than the second preset temperature.
9. The system of claim 8, further comprising a switch module;
the switch module comprises a plurality of switches, and the plurality of switches are in one-to-one correspondence with a plurality of loads;
one end of each switch is connected with the third end of the second change-over switch, and the other end of each switch is connected with a load corresponding to the switch.
10. The system of any one of claims 1-9, wherein the energy storage module comprises a plurality of energy storage cells connected in series.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320250975.4U CN219372035U (en) | 2023-02-07 | 2023-02-07 | Power supply system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320250975.4U CN219372035U (en) | 2023-02-07 | 2023-02-07 | Power supply system |
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