CN104242811A - Photovoltaic power supply system - Google Patents
Photovoltaic power supply system Download PDFInfo
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- CN104242811A CN104242811A CN201410496028.9A CN201410496028A CN104242811A CN 104242811 A CN104242811 A CN 104242811A CN 201410496028 A CN201410496028 A CN 201410496028A CN 104242811 A CN104242811 A CN 104242811A
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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
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- 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
Abstract
The invention discloses a photovoltaic power supply system. The photovoltaic power supply system comprises M photovoltaic cell components, N photovoltaic inverters, a voltage source and a power grid. Each photovoltaic inverter comprises a first input terminal and a first output terminal. At least one photovoltaic cell component is connected to any first input terminal. The first output terminals are in parallel and electric connection with the power grid. The first input terminals are grounded through the voltage source. The N is an integer larger than or equal to 1, and the M is an integer larger than or equal to 1. According to the photovoltaic power supply system, the voltage source is connected between the first input terminal of any photovoltaic inverter and the ground, so that the photovoltaic cell components of the whole photovoltaic power supply system are all under positive bias, generation of photovoltaic PID (potential induced degradation) effects is inhibited, degradation of the photovoltaic cell components is reduced, and power generation capacity of the photovoltaic power supply system is improved.
Description
Technical field
The present invention relates to a kind of photovoltaic power supply system.
Background technology
The SUNPOWER company of Germany finds that photovoltaic module makes to there is leakage current between glass, encapsulating material for a long time under action of high voltage for 2005, a large amount of charge collection is at battery surface, battery surface passivation effect is worsened, cause photovoltaic module performance lower than standard design, thus cause generating efficiency to decay, the potential potential induction attenuation (Potential Induced Degradation, PID) of Here it is photovoltaic module; In 2010, NREL and Solon confirmed the P type crystal-silicon battery slice no matter which kind of technology photovoltaic module adopts, and photovoltaic module has PID risk under back bias voltage.Current research result shows, photovoltaic module under back bias voltage after some years, the maximum decay that can cause output power of photovoltaic module 70%, the generating capacity of extreme influence photovoltaic power supply system.
In order to suppress the PID effect of photovoltaic module, three kinds of methods are usually adopted in the industry to solve this problem: method one: the PID effect suppressing photovoltaic module by cell panel negative pole being connect the earth, please refer to Fig. 1; Method two: night is by suppressing the PID effect of photovoltaic module to the mode of negative pole to the earth applying forward voltage of each road photovoltaic module; Method three: select the photovoltaic cell component with anti-PID performance to suppress the PID effect of photovoltaic module.
Wherein, method one is relatively applicable to single centralized inverter electric power system, for multiple inverter parallel system, because each inverter input photovoltaic voltage is inconsistent, and the output of each inverter connects together, its internal bus midpoint potential is equal, if each inverter input negative pole all connects the earth, namely the internal bus mid point of each inverter is all consistent to negative pole current potential, to the inverter parallel system that the inverter without booster circuit is formed, when each inverter of inverter input photovoltaic voltage is inconsistent, upper Down Highway is by voltage un-balance, inverter is caused to protect shutdown not work, even damage, for the parallel system that the inverter of two-stage topologies is formed, each inverter of inverter input photovoltaic voltage is inconsistent but busbar voltage is consistent, little on each inverter impact, if there is the situation that busbar voltage between each inverter is inconsistent, because the internal bus mid point of each inverter is equal to negative pole current potential, the uneven situation of upper and lower busbar voltage must be caused to occur, method two is relatively good method for multiple stage inverter parallel system, but need all to need to increase relevant the suppression to every platform inverter, cost and system complexity have no small lifting, simultaneously due under photovoltaic DC-to-AC converter on daytime is still operated in back bias voltage, night exports the effect of repairing to photovoltaic module power can not 100%, still has the loss of certain power, method three can promote total system cost.
Visible, how providing the photovoltaic power supply system that a kind of structure is simple, low cost also can suppress photovoltaic PID effect, is those skilled in the art's technical issues that need to address.
Summary of the invention
The object of the present invention is to provide that a kind of structure is simple, low cost and the photovoltaic power supply system of photovoltaic PID effect can be suppressed.
For solving the problem, the invention provides following technical scheme.
The invention provides a kind of photovoltaic power supply system, it comprises M photovoltaic cell component, N number of photovoltaic DC-to-AC converter, voltage source and electrical network, described photovoltaic DC-to-AC converter comprises first input end and the first output, first input end described in any one has at least one piece of described photovoltaic cell component access, described first output parallel connection is also electrically connected described electrical network, and described first input end connects the earth by described voltage source, wherein, N be more than or equal to 1 integer, M be more than or equal to 1 integer.
Wherein, described photovoltaic power supply system also comprises transformer, and described transformer comprises the second input and the second output, described first output and described second input electrical connection, described second output and the electrical connection of described electrical network.
Wherein, described first input end comprises the first negative pole, and described photovoltaic power supply system also comprises voltage source, and described voltage source comprises the second positive pole and the second negative pole, described first negative pole and described second positive pole electrical connection.
Wherein, described second negative pole connects the earth.
Wherein, described photovoltaic power supply system also comprises fuse, and described fuse is serially connected between described second negative pole and the earth.
Wherein, described photovoltaic power supply system also comprises fuse and gate-controlled switch, and described fuse is serially connected between described second negative pole and described gate-controlled switch, and described gate-controlled switch connects the earth.
Wherein, described photovoltaic power supply system also comprises semiconductor power pipe, and described semiconductor power pipe is serially connected in described second negative electricity and connects between the earth.
Wherein, described photovoltaic power supply system also comprises fuse and semiconductor power pipe, and described fuse is serially connected between described second negative pole and described semiconductor power pipe, and described semiconductor power pipe connects the earth.
Wherein, described voltage source is the voltage source of isolation, described voltage source comprises Input transformation part, transformer isolation part and output, the input of described Input transformation part and the first output electrical connection of described photovoltaic DC-to-AC converter, the output of described Input transformation part and the input electrical connection of described defeated transformer isolation part, the output of described transformer isolation part is electrically connected with the input of described output again, the negative pole of described output output connects the earth, the positive pole of described output output is connected with the first negative electricity of the first input end of described photovoltaic DC-to-AC converter.
Wherein, described voltage source is the voltage source of non-isolated, described voltage source comprises the first voltage source and translation circuit, the described negative pole of the first voltage source is connected with the first negative electricity of the first input end of photovoltaic DC-to-AC converter, the input of described translation circuit is electrically connected with described first voltage source, the negative pole of the output of described translation circuit connects the earth, and the positive pole of the output of described translation circuit is connected with the first negative electricity of the first input end of described photovoltaic DC-to-AC converter.
Photovoltaic power supply system provided by the invention, by the first input end of any one photovoltaic DC-to-AC converter described indirect voltage source to the earth, thus under making the photovoltaic cell component of whole photovoltaic power supply system all be in positive bias, and then suppress the generation of photovoltaic PID effect, decrease the decay of photovoltaic cell component, improve the generating capacity of photovoltaic power supply system.
Accompanying drawing explanation
In order to be illustrated more clearly in technical scheme of the present invention, be briefly described to the accompanying drawing used required in execution mode below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained from these accompanying drawings.
The photovoltaic power supply system configuration schematic diagram of Fig. 1 photovoltaic module minus earth disclosed in prior art.
The photovoltaic power supply system schematic that Fig. 2 provides for the first embodiment of the present invention.
Fig. 3 is the circuit diagram of the first execution mode of voltage source in Fig. 2.
Fig. 4 is the circuit diagram of the second execution mode of voltage source in Fig. 2.
Fig. 5 is the circuit diagram of the further refinement of Fig. 2.
The photovoltaic power supply system schematic that Fig. 6 provides for the second embodiment of the present invention.
The photovoltaic power supply system schematic that Fig. 7 provides for the third embodiment of the present invention.
The photovoltaic power supply system schematic that Fig. 8 provides for the present invention's the 4th kind of embodiment.
The photovoltaic power supply system schematic that Fig. 9 provides for the present invention's the 5th kind of embodiment.
The photovoltaic power supply system schematic that Figure 10 provides for the present invention's the 6th kind of embodiment.
The photovoltaic power supply system schematic that Figure 11 provides for the present invention's the 7th kind of embodiment.
The photovoltaic power supply system schematic that Figure 12 provides for the present invention's the 8th kind of embodiment.
Embodiment
Below in conjunction with the accompanying drawing in embodiment of the present invention, the technical scheme in embodiment of the present invention is clearly and completely described.
Please refer to Fig. 2, photovoltaic power supply system 100 provided by the invention, comprise M photovoltaic cell component 10, N number of photovoltaic DC-to-AC converter 20, isolating transformer 30 and electrical network 40.
Described photovoltaic DC-to-AC converter 20 comprises first input end and the first output, first input end described in any one has at least one piece of described photovoltaic cell component 10 to access, described first output parallel connection is also electrically connected described isolating transformer 30, described isolating transformer 30 is electrically connected described electrical network 40, wherein, N be more than or equal to 1 integer, M be more than or equal to 1 integer.
Described transformer 30 comprises the second input and the second output, and described first output and described second input electrical connection, described second output and described electrical network 40 are electrically connected.
First input end described in each comprises the first negative pole and the first positive pole, and described photovoltaic power supply system 100 also comprises voltage source 50, and described voltage source 50 comprises the second positive pole and the second negative pole, described first negative pole and described second positive pole electrical connection.In other words, the first negative pole of the first input end of described photovoltaic DC-to-AC converter is by described voltage source 50 ground connection.
In the present embodiment, the first positive pole is electrically connected with the positive pole of photovoltaic cell component 10, and the first negative pole is connected with the negative electricity of photovoltaic cell component 10.
In one embodiment of the invention, please refer to Fig. 3, voltage source 50 is the voltage source of isolation, described voltage source 50 comprises Input transformation part 52, transformer isolation part 54 and output 56, first output of the input termination photovoltaic DC-to-AC converter 20 of described Input transformation part 52, the output of described Input transformation part 52 and the input 54 of described defeated transformer isolation part are electrically connected, the output of described transformer isolation part 54 is electrically connected with the input of described output 56 again, the negative pole of the output of described output 56 connects the earth, the described positive pole of output 56 output is connected with the first negative electricity of the first input end of photovoltaic DC-to-AC converter 20.
In another embodiment of the invention, please refer to Fig. 4, the voltage source that voltage source 50 ' is non-isolated, described voltage source 50 ' comprises the first voltage source 58 and translation circuit 59, the negative pole of described first voltage source 58 connects the first negative electricity connection of the first input end of photovoltaic DC-to-AC converter 20, the input of described translation circuit 59 is electrically connected with described first voltage source 58, the negative pole of the output of described translation circuit 59 connects the earth, described translation circuit 59 the positive pole of output be connected with the first negative electricity of the first input end of photovoltaic DC-to-AC converter 20.
Please refer to Fig. 5, due to described photovoltaic DC-to-AC converter 20 the first output and be linked together, then electrical network 40 is connected to by an isolating transformer 30, described photovoltaic DC-to-AC converter internal bus electric capacity midpoint potential is equal, and namely first photovoltaic DC-to-AC converter 20 internal bus electric capacity midpoint potential is equal with the current potential of second photovoltaic DC-to-AC converter 20 internal capacitance mid point and the current potential of N number of photovoltaic DC-to-AC converter 20 internal bus electric capacity mid point.N number of photovoltaic DC-to-AC converter 20 internal capacitance midpoint potential is Vbus/2+V1, and V1 is the voltage of the first negative pole to the earth of the first input end of photovoltaic DC-to-AC converter 20, i.e. the voltage of voltage source 50, its value is greater than 0.When N number of photovoltaic DC-to-AC converter 20 internal bus voltage is all consistent, because N number of photovoltaic DC-to-AC converter 20 internal capacitance midpoint potential is equal, the 1st the first negative pole to the first input end of N-1 photovoltaic DC-to-AC converter is all V1 to voltage greatly, when N number of photovoltaic DC-to-AC converter 20 internal bus voltage is inconsistent, can be considered two kinds of situations: 1, the internal bus voltage of N number of other photovoltaic DC-to-AC converters 20 of photovoltaic DC-to-AC converter 20 internal bus voltage ratio is all high, its busbar voltage is designated as Vbus_N, wherein, V1 is the voltage of the first negative pole to the earth of the first input end of N number of photovoltaic DC-to-AC converter 20, the i.e. voltage of voltage source 50, its value is greater than 0, other photovoltaic DC-to-AC converter 20 internal bus voltages are designated as Vbus_1 successively, Vbus_2 ... Vbus_N-1, wherein, Vbus_N>Vbus_1, Vbus_N>Vbus_2, Vbus_N>Vbus_N-1, first negative pole of the first input end of the 1st photovoltaic DC-to-AC converter 20 is (Vbus_N/2-Vbus_1/2)+V1 to voltage greatly and is greater than 0, first negative pole of the first input end of the 2nd photovoltaic DC-to-AC converter 20 is (Vbus_N/2-Vbus_2/2)+V1 to voltage greatly and is greater than 0, first negative pole of the first input end of N-1 photovoltaic DC-to-AC converter 20 is to voltage (Vbus_N/2-Vbus_N-1/2)+V1 greatly, 2, the internal bus voltage of N number of other photovoltaic DC-to-AC converters 20 of photovoltaic DC-to-AC converter 20 internal bus voltage ratio is all low, if its busbar voltage is less than busbar voltage set point, is considered as photovoltaic power supply system 100 and does not work or fault, report monitoring alarm, if its busbar voltage is greater than busbar voltage set point, now busbar voltage setting minimum value is
vline is the line voltage of electrical network 40, and the first negative pole of the first input end of the 1st photovoltaic DC-to-AC converter 20 is (Vbus_N-1/2-to voltage greatly
)+V1, the first negative pole of the first input end of N number of photovoltaic DC-to-AC converter 20 is (Vbus_N/2-to voltage greatly
)+V1, the first negative pole of the first input end of N-1 photovoltaic DC-to-AC converter 20 is to voltage (Vbus_N-1/2-greatly
)+V1, now, in order to make the first negative pole of the first input end of photovoltaic DC-to-AC converter 20 to the earth voltage be positive voltage, V1> (Vbus_N-1/2-
).In other words, because the first input end of described photovoltaic DC-to-AC converter 20 of the present invention connects the earth by voltage source 50, no matter under what circumstances simultaneously, the voltage of voltage source 50 of the present invention is positive voltage, under making described photovoltaic DC-to-AC converter 20 be in positive bias, and the negative pole of the first input end of described photovoltaic DC-to-AC converter 20 is connected with the negative electricity of photovoltaic cell component 10, thus under photovoltaic cell component 10 is in positive bias, and then suppress the generation of photovoltaic PID effect, decrease the decay of photovoltaic cell component 10, improve the generating capacity of photovoltaic power supply system.
In the present embodiment, bus capacitor midpoint potential is the current potential between inner two electric capacity of each photovoltaic DC-to-AC converter 20.
Further, because photovoltaic power supply system 100 of the present invention comprises the photovoltaic DC-to-AC converter 20 of N number of parallel connection, wherein N be more than or equal to 1 integer, namely photovoltaic power supply system 100 of the present invention be not only applicable to single centralized photovoltaic DC-to-AC converter electric power system and also be applicable to multiple photovoltaic DC-to-AC converter parallel system.And, do not need to increase compensating circuit to each photovoltaic DC-to-AC converter 20 and just can reach the object suppressing photovoltaic PID effect, do not need to use the photovoltaic cell component 10 with anti-PID performance just can reach the object suppressing photovoltaic PID effect simultaneously yet, not only structure is simple to make photovoltaic power supply system 100 of the present invention, and with low cost.
Please refer to Fig. 6, for the photovoltaic power supply system 100a of the second execution mode of the present invention, the structural similarity of the photovoltaic power supply system 100 in the photovoltaic power supply system 100a of the second execution mode and the first execution mode, the functional similarity realized, and substantially identical technique effect can be reached, its difference is only: do not have isolating transformer in the photovoltaic power supply system 100a of the second execution mode, and namely first output of described photovoltaic DC-to-AC converter 20a is directly connected with electrical network 40a.
Please refer to Fig. 7, for the photovoltaic power supply system 100b of the third execution mode of the present invention, the structural similarity of the photovoltaic power supply system 100 in the photovoltaic power supply system 100b of the third execution mode and the first execution mode, the functional similarity realized, and substantially identical technique effect can be reached, its difference is only: voltage source 50b is by fuse 60b ground connection, namely second negative pole of described voltage source 50b is electrically connected with fuse 60b, fuse 60b ground connection, in other words between fuse 60b the second negative pole of being serially connected in described voltage source 50b and ground.
Because of a series connection fuse 60b between second negative pole and the earth of described voltage source 50b; when the first negative pole of the first input end from photovoltaic DC-to-AC converter 20b is too large to leakage current greatly by voltage source 50b; fuse 60b can disconnect the leakage current loop between the first negative pole of the first input end of photovoltaic DC-to-AC converter 20b and the earth, thus protection photovoltaic DC-to-AC converter 20b is not damaged.
Please refer to Fig. 8, for the photovoltaic power supply system 100c of the present invention's the 4th kind of execution mode, the structural similarity of the photovoltaic power supply system 100b in the photovoltaic power supply system 100c of the 4th kind of execution mode and the third execution mode, the functional similarity realized, and substantially identical technique effect can be reached, its difference is only: fuse 60c is by control switch 70c ground connection, namely second negative pole of described voltage source 50c is electrically connected with fuse 60c, fuse 60c and control switch 70c is electrically connected, control switch 70c ground connection, described fuse 60c is serially connected between second negative pole of described voltage source 50c and described gate-controlled switch 70c in other words, described gate-controlled switch 70c ground connection.
Because adding described gate-controlled switch 70c between described voltage source 50c and the earth, further increase flexibility and intelligent.
Please refer to Fig. 9, for the photovoltaic power supply system 100d of the present invention's the 5th kind of execution mode, the structural similarity of the photovoltaic power supply system 100 in the photovoltaic power supply system 100d of the 5th kind of execution mode and the first execution mode, the functional similarity realized, and substantially identical technique effect can be reached, its difference is only: voltage source 50d is by semiconductor power pipe 80d ground connection, namely second negative pole of described voltage source 50d is electrically connected with semiconductor power pipe 80d, semiconductor power pipe 80d ground connection, in other words between semiconductor power pipe 80d the second negative pole of being serially connected in described voltage source 50d and ground, described semiconductor power pipe 80d can positive-negative connected.
In the present embodiment, semiconductor power pipe 80d is diode, IGBT, or MOSFET etc. has the semiconductor power pipe of one-way conduction ability.
Because being serially connected with semiconductor power pipe 80d between first negative pole and the earth of the first input end of photovoltaic DC-to-AC converter 20d, thus the first negative pole having blocked the first input end of photovoltaic DC-to-AC converter 20d is by the leakage current forward loop of voltage source 50d to the earth, but greatly by semiconductor power pipe 80d and voltage source 50d, this return circuit of the first negative pole to the first input end of photovoltaic DC-to-AC converter 20d does not block, when the cathode voltage of voltage source 50d is lower than large ground voltage, semiconductor power pipe 80d conducting, the cathode voltage of voltage source 50d is pulled to large ground voltage, first negative pole of the first input end of photovoltaic DC-to-AC converter 20d and the voltage of the earth are the voltage V1 of voltage source 50d, namely this block forward leakage current loop, but can ensure not affect performance.
Please refer to Figure 10, for the photovoltaic power supply system 100f of the present invention's the 6th kind of execution mode, the structural similarity of the photovoltaic power supply system 100d in photovoltaic power supply system 100f and the 5th kind of the execution mode of the 6th kind of execution mode, the functional similarity realized, and substantially identical technique effect can be reached, its difference is only: voltage source 50f is by fuse 60f and semiconductor power pipe 80f ground connection, namely second negative pole of described voltage source 50f is electrically connected with fuse 60f, fuse 60f and semiconductor power pipe 80f is electrically connected, semiconductor power pipe 80f ground connection, fuse 60f is serially connected between second negative pole of described voltage source 50f and semiconductor power pipe 80f in other words, semiconductor power pipe 80f ground connection.
Because being serially connected with semiconductor power pipe 80f between first negative pole and the earth of the first input end of photovoltaic DC-to-AC converter 20f, thus the first negative pole having blocked the first input end of photovoltaic DC-to-AC converter 20f is by the leakage current forward loop of voltage source 50f to the earth, but greatly by semiconductor power pipe 80f and voltage source 50f, this return circuit of the first negative pole to the first input end of photovoltaic DC-to-AC converter 20f does not block, when the cathode voltage of voltage source 50f is lower than large ground voltage, semiconductor power pipe 80f conducting, the cathode voltage of voltage source 50f is pulled to large ground voltage, first negative pole of the first input end of photovoltaic DC-to-AC converter 20f and the voltage of the earth are the voltage V1 of voltage source 50f, namely this block forward leakage current loop, but can ensure not affect performance.And between semiconductor power pipe 80f and voltage source 50f inline fuse 60f; thus the leakage current loop of the first negative pole to the earth of the first input end of photovoltaic DC-to-AC converter 20f under ensure that abnormal conditions, can be disconnected, protection photovoltaic DC-to-AC converter 20f inverter is not damaged.
Please refer to Figure 11, for the photovoltaic power supply system 100g of the present invention's the 7th kind of execution mode, the structural similarity of the photovoltaic power supply system 100 in the photovoltaic power supply system 100g of the 7th kind of execution mode and the first execution mode, the functional similarity realized, and substantially identical technique effect can be reached, its difference is only: described voltage source 50g connects a circuit for detecting 51g, described circuit for detecting 51g is for detecting the state of described voltage source 50g, and report the control chip of described photovoltaic DC-to-AC converter 20g inside, described control chip is according to the delivering alarm signal of the described voltage source 50g reported or off signal.
Because circuit for detecting 51g can detect the state of voltage source 50g, and send alarm signal or off signal by control chip, thus improve the fail safe of photovoltaic power supply system 100g.
Please refer to Figure 12, for the photovoltaic power supply system 100h of the present invention's the 8th kind of execution mode, the structural similarity of the photovoltaic power supply system 100 in the photovoltaic power supply system 100h of the 7th kind of execution mode and the first execution mode, the functional similarity realized, and substantially identical technique effect can be reached, its difference is only: described voltage source 50h connects a telecommunication circuit 53h, described control circuit 53h connects a supervisory circuit 54h, described control circuit 53h is for detecting the state of described voltage source 50h and directly reporting supervisory circuit 54h, described supervisory circuit 54h is according to the delivering alarm signal of the described voltage source 50 reported or off signal.
Because control circuit 53h can detect the state of voltage source 50h, and send alarm signal or off signal by supervisory circuit 54h, thus improve the fail safe of photovoltaic power supply system 100h.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (10)
1. a photovoltaic power supply system, it is characterized in that, described photovoltaic power supply system comprises M photovoltaic cell component, N number of photovoltaic DC-to-AC converter, voltage source and electrical network, described photovoltaic DC-to-AC converter comprises first input end and the first output, first input end described in any one has at least one piece of described photovoltaic cell component access, described first output parallel connection is also electrically connected described electrical network, described first input end connects the earth by described voltage source, wherein, N be more than or equal to 1 integer, M be more than or equal to 1 integer.
2. photovoltaic power supply system as claimed in claim 1, it is characterized in that, described photovoltaic power supply system also comprises transformer, and described transformer comprises the second input and the second output, described first output and described second input electrical connection, described second output and the electrical connection of described electrical network.
3. photovoltaic power supply system as claimed in claim 1 or 2, it is characterized in that, described first input end comprises the first negative pole, and described voltage source comprises the second positive pole and the second negative pole, described first negative pole and described second positive pole electrical connection.
4. photovoltaic power supply system as claimed in claim 3, it is characterized in that, described second negative pole connects described the earth.
5. photovoltaic power supply system as claimed in claim 3, it is characterized in that, described photovoltaic power supply system also comprises fuse, and described fuse is serially connected between described second negative pole and described the earth.
6. photovoltaic power supply system as claimed in claim 3, it is characterized in that, described photovoltaic power supply system also comprises fuse and gate-controlled switch, and described fuse is serially connected between described second negative pole and described gate-controlled switch, and described gate-controlled switch connects described the earth.
7. photovoltaic power supply system as claimed in claim 3, it is characterized in that, described photovoltaic power supply system also comprises semiconductor power pipe, and described semiconductor power pipe is serially connected between described second negative pole and described the earth.
8. photovoltaic power supply system as claimed in claim 3, it is characterized in that, described photovoltaic power supply system also comprises fuse and semiconductor power pipe, and described fuse is serially connected between described second negative pole and described semiconductor power pipe, and described semiconductor power pipe connects described the earth.
9. photovoltaic power supply system as claimed in claim 3, it is characterized in that, described voltage source is the voltage source of isolation, described voltage source comprises Input transformation part, transformer isolation part and output, the input of described Input transformation part and the first output electrical connection of described photovoltaic DC-to-AC converter, the output of described Input transformation part and the input electrical connection of described transformer isolation part, the output of described transformer isolation part is electrically connected with the input of described output, the negative pole of the output of described output connects described the earth, the positive pole of the output of described output is connected with the first negative electricity of the first input end of described photovoltaic DC-to-AC converter.
10. photovoltaic power supply system as claimed in claim 3, it is characterized in that, described voltage source is the voltage source of non-isolated, described voltage source comprises the first voltage source and translation circuit, the negative pole of described first voltage source is connected with the first negative electricity of the first input end of described photovoltaic DC-to-AC converter, the input of described translation circuit is electrically connected with described first voltage source, the negative pole of the output of described translation circuit connects described the earth, and the positive pole of the output of described translation circuit is connected with the first negative electricity of the first input end of described photovoltaic DC-to-AC converter.
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| CN106160651A (en) * | 2016-08-18 | 2016-11-23 | 特变电工西安电气科技有限公司 | A kind of system suppressing photovoltaic battery panel PID effect |
| CN106208952A (en) * | 2016-08-31 | 2016-12-07 | 上能电气股份有限公司 | A kind of method of photovoltaic system anti-PID effect |
| CN107230997A (en) * | 2017-05-11 | 2017-10-03 | 华为技术有限公司 | A kind of photovoltaic generating system |
| EP3823127A1 (en) * | 2019-11-13 | 2021-05-19 | Solaredge Technologies Ltd. | Systems and methods to increase the reliability and the service life time of photovoltaic (pv) modules |
| US11159016B2 (en) | 2018-05-10 | 2021-10-26 | Solaredge Technologies Ltd. | Systems and methods to increase the reliability and the service life time of photovoltaic (PV) modules |
| US11258261B2 (en) | 2018-05-10 | 2022-02-22 | Solaredge Technologies Ltd. | Systems and methods to increase the reliability and the service life time of photovoltaic (PV) modules |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103248007A (en) * | 2013-05-20 | 2013-08-14 | 中节能东台太阳能发电有限公司 | PID (Potential Induced Degradation)-resistant circuit and monitoring device thereof |
| CN203166494U (en) * | 2013-03-26 | 2013-08-28 | 阳光电源（上海）有限公司 | Device for solving potential induced degradation |
| CN203218893U (en) * | 2013-04-24 | 2013-09-25 | 阳光电源（上海）有限公司 | Device for solving potential induction attenuation |
| CN103337874A (en) * | 2013-06-09 | 2013-10-02 | 阳光电源股份有限公司 | Photovoltaic power generation system, and voltage compensation device and converter applicable to same |
| CN103475271A (en) * | 2013-09-24 | 2013-12-25 | 深圳市禾望电气有限公司 | Photovoltaic power generation system and control method |
| CN103607172A (en) * | 2013-12-05 | 2014-02-26 | 无锡上能新能源有限公司 | Device for simultaneously realizing negative grounding and ground insulation resistance detection in photovoltaic power station |
| CN103944502A (en) * | 2014-05-09 | 2014-07-23 | 阳光电源股份有限公司 | Anti-potential potential induction decay photovoltaic power generation system, photovoltaic module and inverter |
| CN103973217A (en) * | 2014-05-19 | 2014-08-06 | 无锡上能新能源有限公司 | Device for restraining PID effect of photovoltaic panel |
| CN104201983A (en) * | 2014-09-23 | 2014-12-10 | 阳光电源股份有限公司 | Device for lowering potential induction decay |
-
2014
- 2014-09-24 CN CN201410496028.9A patent/CN104242811A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203166494U (en) * | 2013-03-26 | 2013-08-28 | 阳光电源（上海）有限公司 | Device for solving potential induced degradation |
| CN203218893U (en) * | 2013-04-24 | 2013-09-25 | 阳光电源（上海）有限公司 | Device for solving potential induction attenuation |
| CN103248007A (en) * | 2013-05-20 | 2013-08-14 | 中节能东台太阳能发电有限公司 | PID (Potential Induced Degradation)-resistant circuit and monitoring device thereof |
| CN103337874A (en) * | 2013-06-09 | 2013-10-02 | 阳光电源股份有限公司 | Photovoltaic power generation system, and voltage compensation device and converter applicable to same |
| CN103475271A (en) * | 2013-09-24 | 2013-12-25 | 深圳市禾望电气有限公司 | Photovoltaic power generation system and control method |
| CN103607172A (en) * | 2013-12-05 | 2014-02-26 | 无锡上能新能源有限公司 | Device for simultaneously realizing negative grounding and ground insulation resistance detection in photovoltaic power station |
| CN103944502A (en) * | 2014-05-09 | 2014-07-23 | 阳光电源股份有限公司 | Anti-potential potential induction decay photovoltaic power generation system, photovoltaic module and inverter |
| CN103973217A (en) * | 2014-05-19 | 2014-08-06 | 无锡上能新能源有限公司 | Device for restraining PID effect of photovoltaic panel |
| CN104201983A (en) * | 2014-09-23 | 2014-12-10 | 阳光电源股份有限公司 | Device for lowering potential induction decay |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106160651A (en) * | 2016-08-18 | 2016-11-23 | 特变电工西安电气科技有限公司 | A kind of system suppressing photovoltaic battery panel PID effect |
| CN106208952A (en) * | 2016-08-31 | 2016-12-07 | 上能电气股份有限公司 | A kind of method of photovoltaic system anti-PID effect |
| CN107230997A (en) * | 2017-05-11 | 2017-10-03 | 华为技术有限公司 | A kind of photovoltaic generating system |
| US11159016B2 (en) | 2018-05-10 | 2021-10-26 | Solaredge Technologies Ltd. | Systems and methods to increase the reliability and the service life time of photovoltaic (PV) modules |
| US11258261B2 (en) | 2018-05-10 | 2022-02-22 | Solaredge Technologies Ltd. | Systems and methods to increase the reliability and the service life time of photovoltaic (PV) modules |
| US11764581B2 (en) | 2018-05-10 | 2023-09-19 | Solaredge Technologies Ltd. | Systems and methods to increase the reliability and the service life time of photovoltaic (PV) modules |
| US11791768B2 (en) | 2018-05-10 | 2023-10-17 | Solaredge Technologies Ltd. | Systems and methods to increase the reliability and the service life time of photovoltaic (PV) modules |
| EP3823127A1 (en) * | 2019-11-13 | 2021-05-19 | Solaredge Technologies Ltd. | Systems and methods to increase the reliability and the service life time of photovoltaic (pv) modules |
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