CN103475208A - PID suppression circuit of photovoltaic system - Google Patents
PID suppression circuit of photovoltaic system Download PDFInfo
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- CN103475208A CN103475208A CN2013104260677A CN201310426067A CN103475208A CN 103475208 A CN103475208 A CN 103475208A CN 2013104260677 A CN2013104260677 A CN 2013104260677A CN 201310426067 A CN201310426067 A CN 201310426067A CN 103475208 A CN103475208 A CN 103475208A
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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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 invention discloses a PID suppression circuit of a photovoltaic system. The PID suppression circuit of the photovoltaic system comprises a PID suppressor and a power source used for supplying electricity to the PID suppressor; the PID suppressor comprises an isolation sampling circuit, a PID controller and an isolation inverting circuit; the isolation inverting circuit is connected with the power source; the isolation sampling circuit is connected between a positive pole and a negative pole of the photovoltaic system and used for obtaining a sampling voltage signal of the photovoltaic system and sending the sampling voltage signal to the PID controller; the PID controller is used for controlling a positive pole of the output end of the isolation inverting circuit to output corresponding output voltage to the negative pole of the photovoltaic system when the fact that the photovoltaic system is not in operation is judged according to the sampling voltage signal; the output voltage signal is positive; a negative pole of the output end of the isolation inverting circuit is in ground connection. According to the PID suppression circuit of the photovoltaic system, restraint on the PID effect of the photovoltaic system is achieved, the structure is simple, and cost is low.
Description
Technical field
The present invention relates to the photovoltaic field, particularly a kind of PID of photovoltaic system suppresses circuit.
Background technology
PID(Potential Induced Degradation, electromotive force is induced decay) effect is a kind of phenomenon that adds the high strength negative voltage and assembly property is reduced on assembly.In the past few decades, because causing component power, the system bias voltage significantly decays.This phenomenon appears in photovoltaic system equally, and its intrinsic PID effect causes the photovoltaic system generated output and descends, and some decay even surpass 50%.
Existing photovoltaic system PID solution is all to use high performance encapsulating material.Such as the insulation property that improve the EVA glued membrane and barrier or employing have the novel TF laminate product of superior insulation property and barrier.But method need to be changed the assembly of photovoltaic system, its cost is high, and is not suitable for existing photovoltaic system.
Summary of the invention
The object of the invention is to, provide a kind of PID of photovoltaic system to suppress circuit, with the PID effect by the photovoltaic system of method inhibition cheaply.
The embodiment of the present invention provides a kind of PID of photovoltaic system to suppress circuit, and this circuit comprises:
PID inhibitor and the power supply that is used to described PID inhibitor to power;
Described PID inhibitor comprises: isolation sample circuit, PID controller and isolated variable circuit; Described isolated variable circuit is connected with described power supply;
Wherein, described isolation sample circuit is connected between the positive and negative electrode of described photovoltaic system, for the sampled voltage signal that obtains described photovoltaic system and described sampled voltage signal is sent to described PID controller;
Described PID controller, for when determining described photovoltaic system according to described sampled voltage signal and do not work, is controlled the output head anode of described isolated variable circuit and is exported corresponding output voltage to the negative pole of described photovoltaic system; Described output voltage is for just;
The negative pole of output end ground connection of described isolated variable circuit.
Preferably, described isolation sample circuit comprises at least two group isolation sampling electronic circuits, be connected between the positive and negative electrode of corresponding photovoltaic system, for the sampled voltage signal of the described photovoltaic system that obtains corresponding group and described sampled voltage signal is sent to described PID controller;
Described isolated variable circuit comprises at least two group isolated variable electronic circuits, and the output head anode of described every group of isolated variable electronic circuit is connected with the negative pole of corresponding described photovoltaic system, the negative pole of output end ground connection of described every group of isolated variable electronic circuit;
When described PID controller is not worked for the described photovoltaic system determine correspondence according to described sampled voltage signal, control the output head anode of corresponding described isolated variable circuit and export corresponding output voltage to the negative pole of the described photovoltaic system of correspondence.
Preferably, the open circuit voltage that described output voltage is described photovoltaic system.
The invention has the beneficial effects as follows:
Export positive voltage by the PID inhibitor to the negative pole of photovoltaic system in the present invention, make the negative pole of photovoltaic system that positive pressure drop be arranged over the ground, thereby recovered the power attenuation caused because of the PID effect.PID in the present invention suppress circuit can be applied to can not ground connection non-isolation solar converter system.
The accompanying drawing explanation
The PID that Fig. 1 is the embodiment of the present invention one suppresses circuit diagram;
The concrete scene application schematic diagram that Fig. 2 is the embodiment of the present invention one;
The PID that Fig. 3 is the embodiment of the present invention two suppresses circuit diagram.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making under the creative work prerequisite the every other embodiment obtained, belong to the scope of protection of the invention.
Fig. 1 is the concrete structure schematic diagram that the PID of a kind of photovoltaic system of providing of the embodiment of the present invention one suppresses circuit.This circuit comprises:
PID inhibitor 1 and be the power supply 2 of PID inhibitor 1 power supply, this power supply can be AC power supplies or other power supplys.
Wherein the PID inhibitor comprises: isolation sample circuit 11, the PID controller 12 be connected with the isolation sample circuit and the isolated variable circuit 13 be connected with PID controller 12.Wherein, isolation sample circuit 11 is connected between the positive and negative electrode of photovoltaic system, for the sampled voltage signal that obtains photovoltaic system and the sampled voltage signal is sent to PID controller 12.
PID controller 12, for when determining photovoltaic system according to the sampled voltage signal and do not work, is controlled isolated variable circuit 13 and is exported corresponding output voltage to the negative pole of photovoltaic system; Output voltage is for just.Now power supply 2 provides starting resistor for isolated variable circuit 13.
The output head anode of above-mentioned isolated variable circuit 13 connects the negative pole of photovoltaic system, its negative pole of output end ground connection.Foregoing invention suppresses the negative pole output positive voltage of circuit to photovoltaic system by PID, makes the negative pole of photovoltaic system that positive pressure drop be arranged over the ground, thereby has recovered the power attenuation caused because of the PID effect.In the present invention, this output voltage is the open circuit voltage of photovoltaic system preferably, with compensating and restoring to greatest extent the power attenuation caused because of the PID effect.
In the present invention, above-mentioned compensation process occurs in photovoltaic system while not working, as evening.Concrete can judge by the magnitude of voltage that detects photovoltaic system, when the voltage of photovoltaic system, when the threshold voltage of setting is following, assert that photovoltaic system do not work.
The open circuit voltage of the above-mentioned photovoltaic system of mentioning can obtain in advance.Concrete, can be by the acquisition of sampling in advance of above-mentioned isolation sample circuit 11.
Fig. 2 is a kind of concrete application that in the present invention, PID suppresses circuit, and wherein, AC power provides power supply for the PID inhibitor.The PID inhibitor is connected between the both positive and negative polarity of photovoltaic system.One end ground connection.
It should be noted that, in the PID inhibitor, an end of isolation sample circuit and the output head anode of isolated variable circuit all are connected with the negative pole of photovoltaic system.In concrete application, it can be connected with the negative pole of photovoltaic system by a wire respectively, also can as shown in Figure 2, connect the negative pole that is connected to photovoltaic system from the PID inhibitor by a wire.
In the present invention, PID suppresses circuit can export corresponding output voltage to many groups photovoltaic system simultaneously.Fig. 3 provides this PID to suppress a kind of concrete structure of circuit:
It comprises power supply 3 and PID inhibitor 4, and this PID suppresses 4 devices and comprises isolation sample circuit 41, the PID controller 42 be connected with isolation sample circuit 41 and the isolated variable circuit 43 be connected with PID controller 42.
Wherein, isolation sample circuit 41 comprises at least two group isolation sampling electronic circuits 411, be connected between the positive and negative electrode of photovoltaic system of corresponding group, for the sampled voltage signal of the photovoltaic system that obtains corresponding group and the sampled voltage signal is sent to PID controller 42.
Isolated variable circuit 43 comprises at least two group isolated variable electronic circuits 431, and the output head anode of every group of isolated variable electronic circuit 431 is connected with the negative pole of the photovoltaic system of corresponding group, the negative pole of output end ground connection of every group of isolated variable electronic circuit 431.
PID controller 42, for when determining corresponding photovoltaic system according to the sampled voltage signal and do not work, is controlled the negative pole of output voltage corresponding to the isolated variable electronic circuit corresponding with the photovoltaic system of not working 431 outputs to this corresponding photovoltaic system.
As shown in Figure 3, when isolation sampling electronic circuit 431 samples sampled voltage signal between PV1-and PV1+ lower than default threshold value, control output voltage corresponding to corresponding isolated variable circuit 411 outputs to PV1-.This output voltage is the open circuit voltage of PV1-and photovoltaic system corresponding to PV1+ preferably.
Above-described specific embodiment, purpose of the present invention, technical scheme and beneficial effect are further described, institute it should be noted, the foregoing is only a specific embodiment of the present invention, those skilled in the art can carry out various changes and modification and not break away from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention also is intended to comprise these changes and modification interior.
Claims (3)
1. the PID of a photovoltaic system suppresses circuit, it is characterized in that, described circuit comprises:
PID inhibitor and the power supply that is used to described PID inhibitor to power;
Described PID inhibitor comprises: isolation sample circuit, PID controller and isolated variable circuit; Described isolated variable circuit is connected with described power supply;
Wherein, described isolation sample circuit is connected between the positive and negative electrode of described photovoltaic system, for the sampled voltage signal that obtains described photovoltaic system and described sampled voltage signal is sent to described PID controller;
Described PID controller, for when determining described photovoltaic system according to described sampled voltage signal and do not work, is controlled the output head anode of described isolated variable circuit and is exported corresponding output voltage to the negative pole of described photovoltaic system; Described output voltage is for just;
The negative pole of output end ground connection of described isolated variable circuit.
2. inhibition circuit as claimed in claim 1, it is characterized in that, described isolation sample circuit comprises at least two group isolation sampling electronic circuits, be connected between the positive and negative electrode of corresponding photovoltaic system, for the sampled voltage signal of the described photovoltaic system that obtains corresponding group and described sampled voltage signal is sent to described PID controller;
Described isolated variable circuit comprises at least two group isolated variable electronic circuits, and the output head anode of described every group of isolated variable electronic circuit is connected with the negative pole of corresponding described photovoltaic system, the negative pole of output end ground connection of described every group of isolated variable electronic circuit;
When described PID controller is not worked for the described photovoltaic system determine correspondence according to described sampled voltage signal, control the output head anode of corresponding described isolated variable circuit and export corresponding output voltage to the negative pole of the described photovoltaic system of correspondence.
3. inhibition circuit as claimed in claim 1 or 2, is characterized in that, the open circuit voltage that described output voltage is described photovoltaic system.
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| CN2013104260677A CN103475208A (en) | 2013-09-18 | 2013-09-18 | PID suppression circuit of photovoltaic system |
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| CN2013104260677A CN103475208A (en) | 2013-09-18 | 2013-09-18 | PID suppression circuit of photovoltaic system |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103888052A (en) * | 2014-04-09 | 2014-06-25 | 上海正泰电源系统有限公司 | Achieving method for preventing photovoltaic cell panel PID effect |
| CN103956970A (en) * | 2014-05-21 | 2014-07-30 | 常州天合光能有限公司 | Photovoltaic current confluence device with PID function |
| CN104300584A (en) * | 2014-11-07 | 2015-01-21 | 深圳市永联科技有限公司 | High-security PID effect inhibition method |
| CN104467018A (en) * | 2014-12-24 | 2015-03-25 | 北京格林科电技术有限公司 | Method and device for protecting photovoltaic module and restraining and removing PID phenomena |
| CN104506130A (en) * | 2014-11-20 | 2015-04-08 | 晶澳(扬州)太阳能光伏工程有限公司 | PID resistant device for solar photovoltaic component using non-isolated inverter |
| CN104579156A (en) * | 2014-11-19 | 2015-04-29 | 南京信息职业技术学院 | PID inhibition device of bipolar type photovoltaic array system |
| CN104682858A (en) * | 2015-02-07 | 2015-06-03 | 杭州桑尼能源科技有限公司 | Photovoltaic PID elimination circuit and method |
| CN105591609A (en) * | 2015-12-31 | 2016-05-18 | 北京天诚同创电气有限公司 | PID processing method and system of photovoltaic system |
| WO2016078507A1 (en) * | 2014-11-21 | 2016-05-26 | 南车株洲电力机车研究所有限公司 | Photovoltaic intelligent power supply |
| CN106033895A (en) * | 2015-03-16 | 2016-10-19 | 台达电子工业股份有限公司 | Inverter device having function of eliminating electric-potential-induced attenuation and solar energy system having function of eliminating electric-potential-induced attenuation |
| 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 |
| US9923517B1 (en) | 2016-12-21 | 2018-03-20 | Sungrow Power Supply Co., Ltd. | Photovoltaic inverter system, potential induced degradation effect compensation method and device for the same |
| CN108649099A (en) * | 2018-04-27 | 2018-10-12 | 华为技术有限公司 | Degradation phenomena processing method based on photovoltaic module and relevant device |
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103888052B (en) * | 2014-04-09 | 2016-05-18 | 上海正泰电源系统有限公司 | A kind of implementation method of preventing photovoltaic battery panel PID effect |
| CN103888052A (en) * | 2014-04-09 | 2014-06-25 | 上海正泰电源系统有限公司 | Achieving method for preventing photovoltaic cell panel PID effect |
| CN103956970A (en) * | 2014-05-21 | 2014-07-30 | 常州天合光能有限公司 | Photovoltaic current confluence device with PID function |
| CN103956970B (en) * | 2014-05-21 | 2016-08-17 | 常州天合光能有限公司 | Have the photovoltaic confluence device of anti-PID function concurrently |
| CN104300584A (en) * | 2014-11-07 | 2015-01-21 | 深圳市永联科技有限公司 | High-security PID effect inhibition method |
| CN104300584B (en) * | 2014-11-07 | 2017-02-01 | 深圳市永联科技股份有限公司 | High-security PID effect inhibition method |
| CN104579156A (en) * | 2014-11-19 | 2015-04-29 | 南京信息职业技术学院 | PID inhibition device of bipolar type photovoltaic array system |
| CN104579156B (en) * | 2014-11-19 | 2017-02-22 | 南京信息职业技术学院 | PID inhibition device of bipolar type photovoltaic array system |
| CN104506130A (en) * | 2014-11-20 | 2015-04-08 | 晶澳(扬州)太阳能光伏工程有限公司 | PID resistant device for solar photovoltaic component using non-isolated inverter |
| US10122176B2 (en) | 2014-11-21 | 2018-11-06 | Crrc Zhuzhou Institute Co., Ltd. | Photovoltaic intelligent power supply |
| WO2016078507A1 (en) * | 2014-11-21 | 2016-05-26 | 南车株洲电力机车研究所有限公司 | Photovoltaic intelligent power supply |
| CN104467018A (en) * | 2014-12-24 | 2015-03-25 | 北京格林科电技术有限公司 | Method and device for protecting photovoltaic module and restraining and removing PID phenomena |
| CN104682858A (en) * | 2015-02-07 | 2015-06-03 | 杭州桑尼能源科技有限公司 | Photovoltaic PID elimination circuit and method |
| CN106033895A (en) * | 2015-03-16 | 2016-10-19 | 台达电子工业股份有限公司 | Inverter device having function of eliminating electric-potential-induced attenuation and solar energy system having function of eliminating electric-potential-induced attenuation |
| CN105591609A (en) * | 2015-12-31 | 2016-05-18 | 北京天诚同创电气有限公司 | PID processing method and system of photovoltaic system |
| 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 |
| US9923517B1 (en) | 2016-12-21 | 2018-03-20 | Sungrow Power Supply Co., Ltd. | Photovoltaic inverter system, potential induced degradation effect compensation method and device for the same |
| EP3340417A1 (en) * | 2016-12-21 | 2018-06-27 | Sungrow Power Supply Co., Ltd. | Photovoltaic inverter system, potential induced degradation effect compensation method and device for the same |
| CN108649099A (en) * | 2018-04-27 | 2018-10-12 | 华为技术有限公司 | Degradation phenomena processing method based on photovoltaic module and relevant device |
| CN108649099B (en) * | 2018-04-27 | 2020-04-28 | 华为技术有限公司 | Degradation phenomenon processing method based on photovoltaic assembly and related equipment |
| US11502643B2 (en) | 2018-04-27 | 2022-11-15 | Huawei Digital Power Technologies Co., Ltd. | Degradation phenomenon treatment method based on photovoltaic module, and related device |
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