WO2022033002A1 - 一种光伏发电系统 - Google Patents
一种光伏发电系统 Download PDFInfo
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- WO2022033002A1 WO2022033002A1 PCT/CN2021/075119 CN2021075119W WO2022033002A1 WO 2022033002 A1 WO2022033002 A1 WO 2022033002A1 CN 2021075119 W CN2021075119 W CN 2021075119W WO 2022033002 A1 WO2022033002 A1 WO 2022033002A1
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- power generation
- photovoltaic power
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- generation device
- output
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- 238000010248 power generation Methods 0.000 title claims abstract description 268
- 238000004146 energy storage Methods 0.000 claims abstract description 97
- 230000000694 effects Effects 0.000 claims abstract description 9
- 238000001514 detection method Methods 0.000 claims description 31
- 230000005669 field effect Effects 0.000 claims description 18
- 239000004065 semiconductor Substances 0.000 claims description 18
- 239000003990 capacitor Substances 0.000 claims description 10
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical group [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 6
- 229910052744 lithium Inorganic materials 0.000 claims description 6
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 claims description 2
- 230000005611 electricity Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 5
- 230000007774 longterm Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 229910052987 metal hydride Inorganic materials 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00302—Overcharge protection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00306—Overdischarge protection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- 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
Definitions
- the present application relates to the technical field of new energy, in particular, to a photovoltaic power generation system.
- One of the objectives of the embodiments of the present application includes providing a photovoltaic power generation system to improve the problem of unstable power supply in the prior art.
- the embodiments of the present application provide a photovoltaic power generation system, including at least two photovoltaic power generation devices; each of the photovoltaic power generation devices includes: a photovoltaic panel unit, which is configured to generate light-sensitive electrical energy based on the photovoltaic effect; an energy storage unit, which is connected to the output end of the photovoltaic panel unit to be configured to store the light-sensitive electrical energy; an input unit, one end of which is connected to the energy storage unit, which The other end is connected with the output end of the photovoltaic panel unit of the other photovoltaic power generation device; the output unit, one end of which is connected with the output end of the photovoltaic panel unit, and the other end is connected with the energy storage unit of the other photovoltaic power generation device connect.
- the photovoltaic power generation system includes at least two photovoltaic power generation devices. After the at least two photovoltaic power generation devices are connected through their input units and output units, their energy storage units are connected in parallel, so that at least two photovoltaic power generation devices form a power supply, that is, at least two photovoltaic power generation devices.
- the photovoltaic power generation device forms a grid through the connection between its input unit and output unit, so that the photovoltaic power generation system can output constant current and voltage, and the output voltage and current are stable. In addition, the two photovoltaic power generation devices pass through its input unit and output unit.
- the photovoltaic panel unit of one photovoltaic power generation device can charge the energy storage unit of another photovoltaic power generation device, so that the photovoltaic power generation device that can generate light-sensitive electric energy in the photovoltaic power generation system can generate electricity to the photovoltaic power generation that cannot generate light-sensitive electric energy.
- the device is charged and the stored electricity of all photovoltaic power generation devices can be increased at the same time during charging, and decreased at the same time when discharged, so as to maximize the utilization rate of solar energy, thereby ensuring that the photovoltaic power generation system can provide stable power supply for electrical equipment.
- the photovoltaic power generation device further includes: a detection unit, which is connected to the photovoltaic panel unit, configured to detect the working state of the photovoltaic panel unit, and outputs a signal configured to represent the working state a level signal; a control unit, which is connected to the detection unit, to be configured to generate a corresponding control signal according to the level signal; a boosting unit, which is connected to the control unit and the energy storage unit respectively, to It is configured to boost the voltage output by the energy storage unit according to the control signal.
- the detection unit inputs the working state of the photovoltaic panel unit to the control unit, so that the control unit controls the boosting unit to boost the voltage output by the energy storage unit according to the working state, thereby ensuring that the photovoltaic power generation device can output a stable voltage.
- the detection unit includes: a first resistor, a second resistor and a triode, one end of the first resistor is connected to the output end of the photovoltaic panel unit, and the other end of the first resistor is connected to the output end of the photovoltaic panel unit.
- One end is connected to one end of the second resistor, the other end of the second resistor is grounded, the other end of the first resistor is also connected to the base of the triode, the emitter of the triode is grounded, and the triode The collector is connected to the control unit.
- one of the pins of the control unit is connected to the collector of the triode in the detection unit, and is configured so that when the collector of the triode outputs a high level to the control unit, the The enable pin outputs a low level to control the booster unit to boost the voltage output by the energy storage unit, and provide a stable power supply for the load;
- the control unit is further configured to enable the pin to output a high level when a preset time elapses, and to control the boosting unit to stop boosting, so as to stop supplying power to the load.
- one of the pins of the control unit is connected to the collector of the triode in the detection unit, and is configured so that when the collector of the triode outputs a low level to the control unit, the The enable pin outputs a high level and controls the boost unit to stop boosting to stop supplying power to the load.
- the photovoltaic power generation device further includes: a manual switch, one end of which is connected to the output end of the energy storage unit, and the other end of which is connected to the boosting unit.
- the booster unit can boost the voltage output by the energy storage unit to ensure that the photovoltaic power generation device can supply power to the external load stably.
- the booster unit and the The connection between the energy storage units is disconnected, and the photovoltaic power generation device cannot supply power to the external load.
- the boosting unit includes: a boosting control circuit, which is connected to the control unit and the energy storage unit, and is configured to convert the control signal according to the control signal generated by the control unit is in a conducting state; a boost circuit is connected to the energy storage unit through the boost control circuit, so as to be configured such that when the boost control circuit is converted into a conducting state, its voltage input terminal is connected to the energy storage unit The unit is connected to boost the voltage output by the energy storage unit.
- the booster control circuit When the booster control circuit receives the control signal generated by the control unit, the booster control circuit switches to the conducting state, so that the booster circuit is connected to the energy storage unit. Since the control signal is for the control unit to detect the work of the photovoltaic panel unit according to the detection unit The state is generated, so it can be ensured that the booster circuit only performs the boosting operation on the energy storage unit when the photovoltaic panel unit is working.
- the boost control circuit includes a P-channel semiconductor field effect transistor and a first capacitor, one end of the first capacitor is grounded, and the other end of the first capacitor is connected to the P-channel
- the source electrode of the P-channel semiconductor field effect transistor is connected to the source electrode of the P-channel semiconductor field effect transistor, the source electrode of the P-channel semiconductor field effect transistor is also connected to the energy storage unit, and the gate electrode of the P-channel semiconductor field effect transistor is connected to the control unit,
- the drain of the P-channel semiconductor field effect transistor is connected to the voltage input end of the boost circuit.
- the booster circuit includes: a booster, whose voltage input terminal is connected to the booster control circuit; a booster detection feedback circuit, which is connected to the output terminal of the booster and the booster control circuit.
- the feedback terminals are respectively connected to be configured to send a feedback signal to the booster according to the voltage output from the output terminal of the booster, so that the booster outputs to the output terminal of the booster according to the feedback signal
- the voltage is adjusted so that the booster can output a stable boosted voltage.
- the photovoltaic power generation device further includes: a boost detection circuit, which is connected to the output end of the boost unit and the control unit, and is configured to detect the boost of the output of the boost unit. the boosted voltage value and send the boosted voltage value to the control unit; an instruction module connected to the control unit to be configured to receive the boosted voltage from the control unit according to the boosted voltage The indicator signal sent by the value and the indicator is indicated according to the indicator signal.
- a boost detection circuit which is connected to the output end of the boost unit and the control unit, and is configured to detect the boost of the output of the boost unit. the boosted voltage value and send the boosted voltage value to the control unit
- an instruction module connected to the control unit to be configured to receive the boosted voltage from the control unit according to the boosted voltage
- the indicator signal sent by the value and the indicator is indicated according to the indicator signal.
- the indicating module includes a light-emitting diode, a buzzer and a horn.
- the photovoltaic power generation device further includes: a charge-discharge protection circuit, which is connected to the energy storage unit and configured to prevent the energy storage unit from being overcharged or overdischarged.
- the input unit shares an input terminal, a ground terminal and a load input terminal
- the output unit includes a shared output terminal, a load output terminal and a ground terminal; the shared input terminal and the energy storage terminal
- the output end of the unit is connected, the shared output end is connected with the output end of the photovoltaic panel unit, and the load output end is connected with the load input end of the input unit.
- the photovoltaic power generation device includes a first photovoltaic power generation device and a second photovoltaic power generation device, and a shared output end of the first photovoltaic power generation device and a shared input end of the second photovoltaic power generation device connecting so that the photovoltaic panel unit of the first photovoltaic power generation device is connected in parallel with the photovoltaic panel unit of the second photovoltaic power generation device;
- the load output end of the first photovoltaic power generation device is connected to the load input end of the second photovoltaic power generation device, and the load input end of the second photovoltaic power generation device is connected to the load output end of the second photovoltaic power generation device,
- the load output end of the second photovoltaic power generation device is connected to an external load, so that the first photovoltaic power generation device and the second photovoltaic power generation device are connected in parallel to supply power to the load.
- the output unit of the first photovoltaic power generation device is connected to the input unit of the second photovoltaic power generation device, and the output unit of the second photovoltaic power generation device is connected to the input unit of the second photovoltaic power generation device.
- the output unit is connected to the input unit of the third photovoltaic power generation device, and the output unit of the third photovoltaic power generation device and the nth photovoltaic power generation device are sequentially connected in the same way, so that a grid is formed between the n photovoltaic power generation devices, and supply power to the load; where n is an integer greater than or equal to 4.
- the photovoltaic power generation device is configured to be connected to a load, the number of the load and the photovoltaic power generation device is multiple, and the load and the photovoltaic power generation device are respectively connected in parallel for multiple times. connected together afterward.
- the energy storage unit is a lithium battery or a nickel-hydrogen battery.
- FIG. 1 is a structural block diagram of a photovoltaic power generation system provided by an embodiment of the application
- FIG. 2 is a structural block diagram of another photovoltaic power generation system provided by an embodiment of the present application.
- FIG. 3 is a structural block diagram of another photovoltaic power generation system provided by an embodiment of the present application.
- FIG. 4 is a structural block diagram of a photovoltaic power generation device provided by an embodiment of the application.
- FIG. 5 is a circuit diagram of a photovoltaic power generation device provided by an embodiment of the application.
- FIG. 6 is a circuit diagram of another photovoltaic power generation device provided by an embodiment of the present application.
- FIG. 7 is a schematic diagram of the photovoltaic power generation system provided in this embodiment.
- Icons 10-photovoltaic power generation system; 100-photovoltaic power generation device; 110-photovoltaic panel unit; 120-energy storage unit; 121-charge and discharge protection circuit; 130-input unit; 140-output unit; 150-detection unit; 160- Control unit; 170-boost unit; 171-boost control circuit; 172-boost circuit; 1721-boost detection feedback circuit; 180-boost detection circuit; 190-indication module.
- FIG. 1 is a structural block diagram of a photovoltaic power generation system 10 provided by an embodiment of the application, including at least two photovoltaic power generation devices 100 ; please refer to FIG. 2 , FIG. 2 is another embodiment of the application.
- FIG. 1 is a structural block diagram of a photovoltaic power generation system 10 provided by an embodiment of the application, including at least two photovoltaic power generation devices 100 ; please refer to FIG. 2 , FIG. 2 is another embodiment of the application.
- each photovoltaic power generation device 100 includes: a photovoltaic panel unit 110, which is configured to generate photosensitive electric energy based on the photovoltaic effect; energy storage;
- the unit 120 is connected with the output end of the photovoltaic panel unit 110 to be configured to store the photoelectric energy;
- the input unit 130 is connected with the energy storage unit 120 at one end and the other end of the photovoltaic unit 120
- the output end of the photovoltaic panel unit 110 of the power generation device 100 is connected;
- the output unit 140 has one end connected to the output end of the photovoltaic panel unit 110 , and the other end connected to the energy storage unit 120 of another photovoltaic power generation device 100 .
- the input unit 130, its shared input end 9 is connected to the output end of the energy storage unit 120;
- the output unit 140, its shared output end 3 is connected to the output end of the photovoltaic panel unit 110, and its load output end 1 is connected to the load input terminal 7 of the input unit.
- the port numbered 8 in the input unit 130 and the port numbered 2 in the output unit 140 are both ground terminals.
- At least two photovoltaic power generation devices 100 include at least a first photovoltaic power generation device 100 and a second photovoltaic power generation device 100 , wherein the first photovoltaic power generation device 100 can be understood as the photovoltaic power generation device 100 on the left side in FIG. 2 . , the second photovoltaic power generation device 100 can be understood as the photovoltaic power generation device 100 on the right side in FIG.
- Terminal 6 is connected to connect the photovoltaic panel unit 110 of the first photovoltaic power generation device 100 in parallel with the photovoltaic panel unit 110 of the second photovoltaic power generation device 100; the load output terminal 1 of the output unit 140 of the first photovoltaic power generation device 100 is connected to the second photovoltaic power generation device 100.
- the load input end 4 of the input unit 130 of the power generation device 100 is connected, the load input end 4 of the input unit 130 of the second photovoltaic power generation device 100 is connected to the load output end 1 of the output unit 140 of the second photovoltaic power generation device 100, and the second photovoltaic power generation device 100 is connected to the load input end 4 of the input unit 130 of the second photovoltaic power generation device 100.
- the load output end of the output unit 140 of the power generation device 100 is connected to a load, so that the first photovoltaic power generation device 100 and the second photovoltaic power generation device 100 are connected in parallel to supply power to the load.
- the output unit 140 of the first photovoltaic power generation device 100 in FIG. 2 (the photovoltaic power generation device on the left in FIG. 2 ) is connected to the input unit 130 of the second photovoltaic power generation device 100 (the photovoltaic power generation device on the right in FIG. 2 ), assuming that The photovoltaic panel unit 110 of the first photovoltaic power generation device 100 can generate electricity normally, and the photovoltaic panel unit 110 of the second photovoltaic power generation device 100 cannot generate electricity without being exposed to sunlight.
- the photovoltaic panel unit 110 of the first photovoltaic power generation device 100 generates electricity and can The generated electric energy is transmitted to its own energy storage unit 120 to charge its own energy storage unit 120 , and the electric energy generated by the photovoltaic panel unit 110 of the first photovoltaic power generation device 100 can also be transmitted to the energy storage of the second photovoltaic power generation device 100 The unit 120 then charges the energy storage unit of the second photovoltaic power generation device 100.
- the second photovoltaic power generation device can also store a certain amount of electrical energy and supply power to the load it supplies even when it cannot generate electricity.
- the above method also realizes the balance of electricity between the first photovoltaic power generation device and the second photovoltaic power generation device.
- the photovoltaic power generation system 10 includes three photovoltaic power generation devices 100 , it is only necessary to connect the output unit 140 of the first photovoltaic power generation device 100 to the input unit 130 of the second photovoltaic power generation device 100 , and connect the second photovoltaic power generation device 100
- the output unit 140 of the first photovoltaic power generation device 100 is connected to the input unit 130 of the third photovoltaic power generation device 100 , and the output unit 140 of the third photovoltaic power generation device 100 is connected to the load. Please refer to FIG.
- FIG. 3 which is a connection diagram of a photovoltaic power generation system 10 including n photovoltaic power generation devices 100, wherein the input unit 130 of the photovoltaic power generation device A1 is connected to the output unit 140 of the photovoltaic power generation device A2, and the photovoltaic power generation device A2
- the input unit 130 of the photovoltaic power generation device A3 is connected to the output unit 140 of the photovoltaic power generation device A3, and the photovoltaic power generation device A3 and the photovoltaic power generation device An are connected in the same way, so that n photovoltaic power generation devices can form a power grid and jointly supply power to the load.
- n photovoltaic power generation device that cannot generate electricity without light irradiation among the n photovoltaic power generation devices
- other photovoltaic power generation devices that normally generate electricity in the n photovoltaic power generation devices can provide power for the load, thereby ensuring the stable operation of the load and
- the n photovoltaic power generation devices can be charged, the amount of electricity stored by each photovoltaic power generation device increases simultaneously during charging and decreases during discharging, wherein n is an integer greater than or equal to 4.
- the photovoltaic power generation system 10 includes at least two photovoltaic power generation devices 100. After the at least two photovoltaic power generation devices 100 are connected through their input units and output units, their energy storage units are connected in parallel, so that at least two photovoltaic power generation devices 100 are connected in parallel.
- the power generation device 100 forms a power source, that is to say, at least two photovoltaic power generation devices 100 form a power grid through the connection between the input unit and the output unit, so that the photovoltaic power generation system can output constant current and voltage, and the output voltage and current are stable,
- the photovoltaic panel unit of one photovoltaic power generation device can charge the energy storage unit of the other photovoltaic power generation device, so that the photovoltaic power generation system can generate photosensitive electric energy
- the photovoltaic power generation device can be charged to the photovoltaic power generation device that cannot generate light-sensitive electric energy, and the stored power of all photovoltaic power generation devices can be increased at the same time during charging, and reduced at the same time when discharged, so as to maximize the utilization rate of solar energy, and then The working time and stability of the photovoltaic power generation system are improved.
- the photovoltaic power generation device 100 further includes: a detection unit 150 connected to the photovoltaic panel unit 110, configured to detect the working state of the photovoltaic panel unit 110, and output a level signal configured to represent the working state; the control unit 160, which is connected with the detection unit 150, to be configured to generate a corresponding control signal according to the level signal; the boosting unit 170, which is connected to the control unit 160 and the energy storage unit 120 respectively, to be configured to be configured according to the control signal to the energy storage unit The voltage output by 120 is boosted.
- the detection unit 150 inputs the working state of the photovoltaic panel unit 110 to the control unit 160, so that the control unit 160 controls the boosting unit 170 to boost the voltage output by the energy storage unit 120 according to the working state, thereby boosting the voltage output by the energy storage unit 120. It is ensured that the photovoltaic power generation device 100 can output a stable voltage.
- the boosting unit 170 includes: a boosting control circuit 171, which is connected to the control unit 160 and the energy storage unit 120, and is configured to be converted into a conducting state according to a control signal generated by the control unit 160; a boosting circuit 172, which is The boost control circuit 171 is connected to the energy storage unit 120 to be configured to connect its voltage input terminal to the energy storage unit 120 when the boost control circuit 171 is switched to a conducting state, so as to boost the voltage output by the energy storage unit 120 .
- the boost control circuit 171 After the boost control circuit 171 receives the control signal generated by the control unit 160, the boost control circuit 171 is switched to the conducting state, so that the boost circuit 172 is connected to the energy storage unit 120. Since the control signal is It is generated by the control unit 160 according to the detection unit 150 detecting the working state of the photovoltaic panel unit 110 , so it can be ensured that the booster circuit 172 only performs the boosting operation on the energy storage unit 120 when the photovoltaic panel unit 110 is not working, while the photovoltaic panel unit 110 When working, the energy storage unit 120 is not boosted.
- the photovoltaic power generation device 100 further includes: a boost detection circuit 180, which is connected to the output end of the boost unit 170 and the control unit 160, and is configured to detect the boosted voltage value output by the boost unit 170 and to detect the boosted voltage value output by the boost unit 170.
- the voltage value of the voltage is sent to the control unit 160;
- the instruction module 190 is connected to the control unit 160 to be configured to receive the instruction signal sent by the control unit 160 according to the boosted voltage value and instruct according to the instruction signal, the instruction module can It is understood that if the photovoltaic power generation system 10 can perform voice indication, the indication module can be selected from components such as a buzzer and a horn.
- the photovoltaic panel unit 110 is a photovoltaic panel BT1, which is configured to generate photosensitive electrical energy based on the photovoltaic effect;
- the energy storage unit 120 is a lithium battery BT2, which is connected to the photovoltaic panel BT1, and is configured to store photosensitive electrical energy,
- the photovoltaic panel BT1 and the lithium battery BT2 are connected through a diode D1, and the energy storage unit 120 may also be other types of energy storage batteries.
- the photovoltaic power generation device 100 further includes: a charge-discharge protection circuit 121 , which is connected to the energy storage unit 120 and configured to prevent the energy storage unit 120 from being overcharged or overdischarged.
- the energy storage unit 120 is controlled to disconnect the power supply to prevent the energy storage unit 120 from being overcharged or overdischarged;
- the unit 120 may also be a nickel-metal hydride battery.
- the detection unit 150 includes: a first resistor R1, a second resistor R2 and a triode Q1, one end of the first resistor R1 is connected to the output end of the photovoltaic panel unit 110, and the other end of the first resistor R1 is connected to the second resistor R2 One end of the second resistor R2 is connected to the ground, the other end of the first resistor R1 is also connected to the base of the transistor Q1, the emitter of the transistor Q1 is grounded, and the collector LX of the transistor Q1 is connected to the control unit 160.
- the output terminal of the photovoltaic panel BT1 When there is light, the output terminal of the photovoltaic panel BT1 generates a voltage, the transistor Q1 is turned on through the first resistor R1 and the second resistor R2, and the collector LX of the transistor Q1 outputs a low level to the control unit 160.
- the photovoltaic power generation device 100 further includes: a manual switch S1 , one end of which is connected to the output end of the energy storage unit 120 , and the other end of which is connected to the boosting unit 170 .
- a manual switch S1 As shown in Figure 5, the No. 2 pin of the manual switch S1 is connected to the energy storage unit 120, the No. 3 pin is floating, and the No. 1 pin is connected to the boosting unit 170.
- the boosting unit 170 can boost the voltage output by the energy storage unit 120, and when the manual switch S1 is turned off, that is, the No. 2 pin and the No. 3 pin are turned on, the boost The connection between the voltage unit 170 and the energy storage unit 120 is disconnected, and the photovoltaic power generation device 100 cannot supply power to the external load.
- the boosting unit 170 can boost the voltage output by the photovoltaic panel unit 110 to ensure that the photovoltaic power generation device 100 can stably supply power to the external load.
- the manual switch S1 is turned off, the connection between the boosting unit 170 and the photovoltaic panel unit 110 is disconnected, and the photovoltaic power generation device 100 cannot supply power to an external load.
- the element OUT1 is the output unit 140
- the element IN1 is the input unit 130
- the U2 in FIG. 6 is the control unit 160
- the VDD terminal of the control unit U2 is connected to a working voltage
- the IOB5 pin of the control unit U2 is connected to the detection unit 150
- the collector LX of the middle transistor is connected. If the collector LX of the transistor outputs a high level to the control unit U2, the control unit U2 controls BOOT_EN to output a low level to control the boosting unit 170 to boost the voltage output by the energy storage unit 120.
- the No. 1 pin and No. 2 pin of the output unit OUT1 are connected to a load to provide a stable power supply for the load.
- a preset time can be set. After the photovoltaic power generation device 100 supplies power to the load for a preset time, the remaining electric energy in the energy storage unit 120 is not enough to supply power to the load, the control unit U2 controls the BOOT_EN terminal to output a high level, and controls the boosting unit 170 to stop boosting to Stop supplying power to the load.
- the control unit U2 controls the BOOT_EN terminal to output a high level, and controls the boosting unit 170 to stop boosting voltage, that is, at this time, the photovoltaic power generation device 100 stops supplying power to the load.
- the boosting unit 170 includes a boosting control circuit 171 and a boosting circuit 172.
- the boosting control circuit 171 includes a P-channel semiconductor field effect transistor Q2 and a first capacitor C1. One end of the first capacitor is grounded, and the first capacitor is grounded. The other end of a capacitor is connected to the source of the P-channel semiconductor field effect transistor Q2, the source of the P-channel semiconductor field effect transistor Q2 is also connected to the energy storage unit 120, and the gate of the P-channel semiconductor field effect transistor Q2 is connected to the energy storage unit 120.
- the control unit U2 is connected, and the drain of the P-channel semiconductor field effect transistor Q2 is connected to the voltage input terminal of the boost circuit 172 .
- the booster circuit 172 is connected to the energy storage unit 120 through the booster control circuit, so as to be configured such that when the booster control circuit 171 is switched to the conducting state, its voltage input terminal is connected to the energy storage unit 120, so as to output the output voltage of the energy storage unit 120. The voltage is boosted. That is to say, when the control unit U2 controls the BOOT_EN terminal to output a low level, the energy storage unit 120 is directly connected to the input terminal of the booster circuit 172 .
- the booster circuit 172 includes a booster U3.
- the boost circuit 172 includes: a booster U3, whose voltage input terminal is connected to the booster control circuit 171; a booster detection feedback circuit 1721, which is respectively connected to the output terminal and the feedback terminal of the booster U3, It is configured to send a feedback signal to the booster U3 according to the voltage output by the output terminal of the booster U3, so that the booster U3 adjusts the voltage output by the output terminal of the booster U3 according to the feedback signal, so that the booster U3 A stable boosted voltage can be output.
- the photovoltaic power generation system 10 designed in the present application can boost its output voltage to about 30V through the boost control circuit 171 and the boost circuit 172, so that the power transmission is improved while maintaining a safe voltage range.
- the efficiency makes the photovoltaic power generation system 10 designed in the present application larger than the existing micro energy panels, can drive more loads, and can also be suitable for medium and long distance (50m to 100m) transportation.
- the photovoltaic power generation device 100 further includes: a boost detection circuit 180, which is connected to the output terminal of the boost unit 170 and the control unit U2, and is configured to detect the boosted voltage value output by the boost unit 170 and to detect the boosted voltage value output by the boost unit 170.
- the voltage value is sent to the control unit U2;
- the instruction module 190 is connected to the control unit U2 to be configured to receive the instruction signal sent by the control unit U2 according to the boosted voltage value and to perform instructions according to the instruction signal.
- the boost detection circuit 180 outputs the low-level signal of the IOB4 pin of the control unit U2 by detecting the transistor Q3, indicating that the boost unit 170 is performing a stable boost output, and the control unit U2 passes The IOB0 pin sends an indication signal to the indication module 190, so that the light-emitting diode LED1 in the indication module 190 emits light for indication, if the boost detection circuit 180 outputs a high-level signal to the IOB4 pin of the control unit U2 through the detection transistor Q3 , it means that the boosting unit 170 does not perform a stable boosting output, and the control unit U2 sends an instruction signal to the indicating module 190 through the IOB0 pin to stop the light-emitting diode LED1 in the indicating module 190 from emitting light.
- the indication module 190 shown in FIG. 6 is a light-emitting diode. It is understood that if the photovoltaic power generation system 10 can perform voice indication, the indication module 190 can be selected from components such as a buzzer and a horn.
- the photovoltaic power generation system designed in the present application can also be used with multiple loads that can be connected in parallel. Effect.
- the three photovoltaic power generation devices 100 can be denoted as a, b, and c, respectively, which simultaneously supply power to the three interconnected loads A, B, and C.
- the shared power supply means that the interconnected photovoltaic power generation devices can be charged with each other.
- the electric energy of the three photovoltaic power generation devices 100 can be basically kept in balance;
- the battery power of the three photovoltaic power generation devices 100 a, b, and c is balanced in real time, so that the power is sufficient, the battery life can meet the requirements, and the efficiency of solar energy is not wasted.
- each photovoltaic power generation device 100 includes: a photovoltaic panel unit 110, which is configured to generate light sensing based on the photovoltaic effect electric energy; an energy storage unit 120, which is connected to the output end of the photovoltaic panel unit 110 to be configured to store the photosensitive electric energy; an input unit 130, one end of which is connected to the energy storage unit 120, and the other end of which is connected to the other end One end is connected to the output end of the photovoltaic panel unit 110 of the photovoltaic power generation device 100 ; one end of the output unit 140 is connected to the output end of the photovoltaic panel unit 110 , and the other end is connected to the energy storage of the other photovoltaic power generation device 100 Unit 120 is connected.
- the photovoltaic power generation system 10 includes at least two photovoltaic power generation devices 100. After the at least two photovoltaic power generation devices 100 are connected through the input unit 130 and the output unit 140, their energy storage units 120 are connected in parallel, so that the at least two photovoltaic power generation devices 100 form a power source , that is to say, at least two photovoltaic power generation devices 100 form a grid through the connection between the input unit 130 and the output unit 140 thereof, so that the photovoltaic power generation system 10 can output constant current and voltage, and the output voltage and current are stable.
- the photovoltaic panel unit of one photovoltaic power generation device can charge the energy storage unit of another photovoltaic power generation device, so that the photovoltaic power generation system can generate photovoltaic power generation of photosensitive electric energy.
- the device can charge the photovoltaic power generation device that cannot generate photosensitive electric energy, so as to maximize the utilization rate of solar energy, thereby ensuring that the photovoltaic power generation system 10 can provide stable and long-term power supply for electrical equipment; it can be seen from the foregoing description.
- the photovoltaic power generation system 10 designed in this application has the advantages of high power, high power supply efficiency, and flexible configuration of the number of solar panels according to load conditions, so that it can be used alone or in combination with multiple microgrids.
- traditional high-power solar energy it has low cost, strong practicability and low maintenance cost, and can be flexibly added with solar panels as units to form a micro-grid to supply power to low-voltage household appliances.
- each photovoltaic power generation device includes: a photovoltaic panel unit, which is configured to generate photosensitive electric energy based on the photovoltaic effect;
- the output end of the photovoltaic panel unit is connected to be configured to store the photosensitive electrical energy;
- the input unit one end of which is connected to the energy storage unit, and the other end of which is connected to the output end of the photovoltaic panel unit of the other photovoltaic power generation device Connection; an output unit, one end of which is connected to the output end of the photovoltaic panel unit, and the other end of which is connected to the energy storage unit of another photovoltaic power generation device.
- the photovoltaic power generation system includes at least two photovoltaic power generation devices. After the at least two photovoltaic power generation devices are connected through their input units and output units, their energy storage units are connected in parallel, so that at least two photovoltaic power generation devices form a power supply, that is, at least two photovoltaic power generation devices.
- the photovoltaic power generation device forms a grid through the connection between its input unit and output unit, so that the photovoltaic power generation system can output constant current and voltage, and the output voltage and current are stable. In addition, the two photovoltaic power generation devices pass through its input unit and output unit.
- the photovoltaic panel unit of one photovoltaic power generation device can charge the energy storage unit of another photovoltaic power generation device, so that the photovoltaic power generation device that can generate light-sensitive electric energy in the photovoltaic power generation system can generate electricity to the photovoltaic power generation that cannot generate light-sensitive electric energy.
- the device is charged to maximize the utilization rate of solar energy, thereby ensuring that the photovoltaic power generation system can provide stable and long-term power supply for electrical equipment; it can be seen from the foregoing description that the photovoltaic power generation system designed in this application is relatively small compared to traditional
- the solar panel has the advantages of high power, high power supply efficiency and flexible configuration of the number of solar panels according to the load situation, so that it can be used alone or in combination with multiple micro-grids. Compared with traditional high-power solar energy, it has the advantages of low cost. , Strong practicability, low maintenance cost, and can be flexibly added with solar panels as a unit to form a micro-grid to supply power to low-voltage household appliances.
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Abstract
Description
Claims (17)
- 一种光伏发电系统,其特征在于,包括至少两个光伏发电装置;每一所述光伏发电装置包括:光伏板单元,其配置成基于光生伏特效应产生光感电能;储能单元,其与所述光伏板单元的输出端连接,以配置成存储所述光感电能;输入单元,其一端与所述储能单元连接,其另一端与另一所述光伏发电装置的光伏板单元的输出端连接;输出单元,其一端与所述光伏板单元的输出端连接,其另一端与另一所述光伏发电装置的储能单元连接。
- 根据权利要求1所述的光伏发电系统,其特征在于,光伏发电装置还包括:检测单元,其与所述光伏板单元连接,以配置成检测所述光伏板单元的工作状态,并输出配置成表示所述工作状态的电平信号;控制单元,其与所述检测单元连接,以配置成根据所述电平信号生成对应的控制信号;升压单元,其与所述控制单元以及所述储能单元分别连接,以配置成根据所述控制信号对所述储能单元输出的电压进行升压。
- 根据权利要求2所述的光伏发电系统,其特征在于,所述检测单元包括:第一电阻、第二电阻以及三极管,所述第一电阻的一端与所述光伏板单元的输出端连接,所述第一电阻的另一端与所述第二电阻的一端连接,所述第二电阻的另一端接地,所述第一电阻的另一端还与所述三极管的基极连接,所述三极管的发射极接地,所述三极管的集电极与所述控制单元连接。
- 根据权利要求3所述的光伏发电系统,其特征在于,所述控制单元的其中一个引脚与检测单元中三极管的集电极连接,并配置成在三极管的集电极输出高电平给控制单元的情况下,控制单元的使能引脚输出低电平,以控制升压单元对储能单元输出的电压进行升压,并为负载进行稳定的供电;所述控制单元还配置成当经过预设时间后,使能引脚输出高电平,并控制升压单元停止升压,以停止为负载进行供电。
- 根据权利要求3所述的光伏发电系统,其特征在于,所述控制单元的其中一个引脚与检测单元中三极管的集电极连接,并配置成在三极管的集电极输出低电平给控制单元的情况下,控制单元的使能引脚输出高电平,并控制升压单元停止升压,以停止为负载进行供电。
- 根据权利要求2至5任一项所述的光伏发电系统,其特征在于,所述光伏发电装置 还包括:手动开关,其一端与所述储能单元的输出端连接,其另一端与所述升压单元连接。
- 根据权利要求2至6任一项所述的光伏发电系统,其特征在于,所述升压单元包括:升压控制电路,其与所述控制单元以及所述储能单元连接,以配置成根据所述控制单元生成的所述控制信号转换为导通状态;升压电路,其通过所述升压控制电路与所述储能单元连接,以配置成在所述升压控制电路转换为导通状态时其电压输入端与所述储能单元连接,以对所述储能单元输出的电压进行升压。
- 根据权利要求7所述的光伏发电系统,其特征在于,所述升压控制电路包括P沟道半导体场效应管以及第一电容,所述第一电容的一端接地,所述第一电容的另一端与所述P沟道半导体场效应管的源极连接,所述P沟道半导体场效应管的源极还与所述储能单元连接,所述P沟道半导体场效应管的栅极与所述控制单元连接,所述P沟道半导体场效应管的漏极与所述升压电路的电压输入端连接。
- 根据权利要求7或8所述的光伏发电系统,其特征在于,所述升压电路包括:升压器,其电压输入端与所述升压控制电路连接;升压检测反馈电路,其与所述升压器的输出端以及反馈端分别连接,以配置成根据所述升压器的输出端输出的电压发送反馈信号至所述升压器,以使所述升压器根据所述反馈信号对所述升压器的输出端输出的电压进行调节。
- 根据权利要求2至9任一项所述的光伏发电系统,其特征在于,所述光伏发电装置还包括:升压检测电路,其与所述升压单元的输出端以及所述控制单元连接,配置成检测所述升压单元输出的升压后的电压值并将所述升压后的电压值发送至所述控制单元;指示模组,其与所述控制单元连接,以配置成接收所述控制单元根据所述升压后的电压值发送的指示信号并根据所述指示信号进行指示。
- 根据权利要求10所述的光伏发电系统,其特征在于,所述指示模组包括发光二极管、蜂鸣器以及喇叭。
- 根据权利要求1-11任一项所述的光伏发电系统,其特征在于,所述光伏发电装置还包括:充放保护电路,其与所述储能单元连接,以配置成防止所述储能单元出现过充或过放情况。
- 根据权利要求1-12任一项所述的光伏发电系统,其特征在于,所述输入单元共享输入端、接地端以及负载输入端,所述输出单元包括共享输出端、负载输出端以及接地端; 所述共享输入端与所述储能单元的输出端连接,所述共享输出端与所述光伏板单元的输出端连接,所述负载输出端与所述输入单元的负载输入端连接。
- 根据权利要求1-13任一项所述的光伏发电系统,其特征在于,所述光伏发电装置包括第一光伏发电装置与第二光伏发电装置,所述第一光伏发电装置的共享输出端与所述第二光伏发电装置的共享输入端连接,以使所述第一光伏发电装置的光伏板单元与所述第二光伏发电装置的光伏板单元并联;所述第一光伏发电装置的负载输出端与所述第二光伏发电装置的负载输入端连接,所述第二光伏发电装置的负载输入端与所述第二光伏发电装置的负载输出端连接,所述第二光伏发电装置的负载输出端外接负载,以使所述第一光伏发电装置与所述第二光伏发电装置并联为所述负载进行供电。
- 根据权利要求1-14任一项所述的光伏发电系统,其特征在于,当所述光伏发电装置的数量为多个时,第一个光伏发电装置的输出单元与第二个光伏发电装置的输入单元连接,第二个光伏发电装置的输出单元与第三个光伏发电装置的输入单元连接,第三个光伏发电装置的输出单元与第n个光伏发电装置之间通过相同方式依次连接,以使n个光伏发电装置之间形成电网,并为负载供电;其中,n为大于或等于4的整数。
- 根据权利要求1-15任一项所述的光伏发电系统,其特征在于,所述光伏发电装置配置成与负载连接,所述负载与所述光伏发电装置的数量均为多个,所述负载与所述光伏发电装置分别进行多次并联后连接在一起。
- 根据权利要求1-16任一项所述的光伏发电系统,其特征在于,所述储能单元为锂电池或镍氢电池。
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