CN104617873B - Method and device for suppressing potential induced degradation (PID) phenomenon of photovoltaic module through inverter - Google Patents
Method and device for suppressing potential induced degradation (PID) phenomenon of photovoltaic module through inverter Download PDFInfo
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- CN104617873B CN104617873B CN201510052612.XA CN201510052612A CN104617873B CN 104617873 B CN104617873 B CN 104617873B CN 201510052612 A CN201510052612 A CN 201510052612A CN 104617873 B CN104617873 B CN 104617873B
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- 238000006731 degradation reaction Methods 0.000 title abstract description 5
- 238000012544 monitoring process Methods 0.000 claims abstract description 12
- 230000001681 protective effect Effects 0.000 claims abstract description 4
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 7
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- 230000001629 suppression Effects 0.000 description 4
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- 230000007797 corrosion Effects 0.000 description 2
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- 238000005516 engineering process Methods 0.000 description 2
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- 230000005012 migration Effects 0.000 description 2
- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
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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
Abstract
The invention discloses a method and device for suppressing a potential induced degradation (PID) phenomenon of a photovoltaic module through an inverter. The method comprises the steps that a bus negative electrode of a photovoltaic system is grounded after a resistor (1), an adjustable direct-current power source (2), a direct-current Hall sensor (4), a fuse protector (5) and a high-voltage relay (6) are connected to the bus negative electrode in series; the current monitored by the direct-current Hall sensor (4) is acquired through a controller (9), when the monitored current changes, the controller (9) adjusts the voltage of the adjustable direct-current power source (2) to improve the adjustment effect, and when the monitored current exceeds the preset protective current, the controller (9) controls the high-voltage relay (6) to open a circuit. The device further comprises a diode (3), a negative-electrode voltage monitoring circuit (7) and a positive-electrode voltage monitoring circuit (8), wherein the diode (3), the negative-electrode voltage monitoring circuit (7) and the positive-electrode voltage monitoring circuit (8) are connected with the controller (9). The phenomenon that the negative electrode is directly grounded is avoided, the voltage between the negative electrode of the system and the ground is boosted, usage of the photovoltaic system is not affected, and safety of the system and staff is better guaranteed.
Description
Technical field
A kind of method and device suppressing photovoltaic module pid phenomenon for inverter, belongs to solar photovoltaic generation system
In protection device.
Background technology
Pid is current potential induction decay (potential induced degradation).Photovoltaic module is for a long time in high voltage
Can make there is leakage current between glass, encapsulating material under effect, a large amount of accumulation are on cell piece surface so that cell piece table
The passivation effect in face deteriorates, and leads to ff, isc, voc to reduce, makes assembly property be less than design standard, this phenomenon induces current potential
Decay, abbreviation pid phenomenon.Practice have shown that, the either any one such as crystal silicon component or film assembly assembly, under back bias voltage
There is the risk of pid, when assembly occurs pid phenomenon, generating efficiency can be had a strong impact on, especially severe, generating efficiency can decline
Reduce to less than the 50% of rated value, have a strong impact on photovoltaic plant investment cycle.
The evanescent mode of pid has:
1) semiconductor active area is affected, and leads to lamination: the migration of ion in active layer, leads to accumulation,
The active region of impact semiconductor material surface.Under serious conditions, the gathering of ion, such as sodium ion in the gathering of glass surface,
Lamination will be led to.
2) performance degradation of semiconductor junction and distributary phenomenon: Ion transfer can occur, in active layer, to make semiconductor junction
Performance degradation simultaneously causes to shunt.
3) transport phenomena of ionization corrosion and a large amount of metal ions: generally the moisture in encapsulation process can cause electrolysis rotten
Erosion and the migration of metallic conduction ion.
At present, the reason cause pid phenomenon may divide external cause and 2 kinds of internal cause:
External cause: photovoltaic module high temperature, humidity and the photovoltaic module being caused due to photovoltaic array earthing mode in the wild
Serious corrosion and decline.
Internal cause: be that inverter is earth-free；Environmental condition such as humiture makes to form leakage between cell piece and ground connection frame
Electric current；Electric leakage circulation road is defined between encapsulating material, backboard, glass and frame；The aspects such as battery production technology.
For slowing down, suppressing, eliminate pid phenomenon, there is following several frequently seen method at present:
1) system minus earth: i.e. photovoltaic system ground connection.Photovoltaic system is by photovoltaic module, header box, DC power distribution cabinet, inverse
Become the elements such as device, equipment composition.Relatively common mode is to choose the minus earth of header box or inverter.It is demonstrated experimentally that
The method can effectively prevent, slow down the generation of pid phenomenon.But the photovoltaic system of the main flow of this kind of method and current design is completely not
With for security consideration, the design of current photovoltaic system is all using the earth-free mode of DC side, the i.e. direct current of photovoltaic system
The positive pole of side and negative pole all do not have any electrical connection with the earth.If by force by the way of minus earth, can lead to
Stray electrical current is superimposed upon DC side input from Grounding, and when positive pole damage in insulation, may be to people, equipment, system
Produce serious injury.
In photovoltaic system, when actually used, the negative potential of photovoltaic module can be lower than ground, negative pole for unearthed system
There is a negative voltage and ground between, the generation of photovoltaic pid phenomenon can be led to.In order to contain the generation of pid phenomenon, with simple
Minus earth, forces equipotential between negative pole and ground.Although this method can effectively contain the generation speed of pid phenomenon,
It is to also bring along new safety problem.Such as, when system positive pole occurs earth fault, the leakage current of system can ratio larger, right
Photovoltaic electric standing-meeting is a huge threat.Because minus earth, then greatly just and negative pole is equipotential, if so personnel
False touch, to the positive pole of photovoltaic module, can cause huge infringement to the personal safety of personnel.Simultaneously as photovoltaic system negative pole connects
Ground, then the AC of system and DC side will form certain circulation, there is also unsafe factor to photovoltaic system.
2) improve encapsulating material dielectric strength: each factory of component is all in the dielectric strength by improving encapsulating material at present
To reduce assembly leakage current over the ground, fact proved, the dielectric strength improving encapsulating material can slow down the generation of pid phenomenon really
Time, but fundamentally prevent the generation of pid phenomenon, or extremely difficult.
3) technique adjusting cell piece: by adjusting battery blade technolgy it is also possible to slow down the generation of pid phenomenon.
The applicant's Application No. 201410817462.2 formerly, patent name is that a kind of protection photovoltaic module suppression disappears
Except in the method and device of pid phenomenon, having fully disclosed by the mcu in controller through modular converter, control adjustable
The technical scheme of section dc source, that is, converted for data signal module converter is analog signalses by controller, gives adjustable
Dc source, analog signalses are converted into the voltage output of 0 ~ 1500v by adjustable dc source, and disclose in detail specific
Principle and implementation.
Content of the invention
The present invention accesses the resistance 1 of a high value between the negative pole and ground of photovoltaic system, it is to avoid negative pole directly connects
Ground, even if being grounded during positive electrode fault, or people touches the positive pole of system, also can protect current limit in certain scope
Card system and the safety of personnel.Meanwhile, we have accessed an adjustable DC power supply 2 between the negative pole and ground of system, are used for
Raise the voltage between the negative pole of system and ground, adjustable DC power supply 2 is adjusted by controller 9, improve forward voltage suppression pid
The effect of phenomenon, adjusts simultaneously and has continuity and real-time.
High-voltage relay 6 is used cooperatively with direct current Hall element 4, when the electric current that direct current Hall element 4 detects is big
When the protection value that we set or when having impact, high-voltage relay 6 is driven to turn off this earthed circuit by controller 9,
To ensure system and personal security.The effect of fuse 5 is second class protection, when hall device or high-voltage relay lost efficacy,
Fuse still can play the effect of protection circuit.
System may also include voltage detecting circuit 7 or voltage detecting circuit 8, is respectively used to detect bus positive pole voltage-to-ground
With bus negative pole voltage-to-ground, the magnitude of voltage participation logic control detecting, bus positive pole voltage-to-ground is less than system during protection value
System normal work, when bus negative pole voltage-to-ground changes, controller 9 adjusts adjustable DC power supply according to the magnitude of voltage monitoring
2, improve forward voltage values suppression pid phenomenon, controller 9 drives high-voltage relay 6 to turn off this earthed circuit, to ensure system
And personal security.
A kind of method and device for inverter suppression photovoltaic module pid phenomenon is it is characterised in that a kind of be used for inversion
Device suppresses the step of the method for photovoltaic module pid phenomenon as follows:
1) series resistor 1 on the bus negative pole of photovoltaic system, adjustable dc source 2, direct current Hall element 4, melts
Disconnected device 5 and high-voltage relay 6, are grounded afterwards, and the positive pole of described adjustable dc source 2 connects bus negative pole direction；
2) gather, with controller 9, the size of current that direct current Hall element 4 monitors, when direct current Hall element 4 is monitored
During the curent change arriving, controller 9 adjusts the voltage swing on adjustable dc source 2, improves regulating effect, when monitor
When electric current exceedes default protective current size, controller 9 controls high-voltage relay 6 disconnecting circuit.
Described adjustable dc source 2 is also parallel with diode 3, the adjustable direct current of conducting termination of described diode 3
The negative pole in source 2, in order to protect adjustable dc source 2, by negative pole, backward voltage over the ground is not affected.
It is also associated with cathode voltage observation circuit 7, described cathode voltage observation circuit 7 between described bus negative pole and the earth
The voltage monitoring is given controller 9 and is carried out logical decision, and then controls adjustable dc source 2 and high-voltage relay 6.
It is also associated with cathode voltage observation circuit 8, described cathode voltage observation circuit 8 between described bus positive pole and the earth
The voltage monitoring is given controller 9 and is carried out logical decision, and then controls adjustable dc source 2 and high-voltage relay 6.
Described controller 9 includes mcu91, voltage acquisition module 92, current acquisition module 93, output module 94 and modulus of conversion
Block 95, described voltage acquisition module 92 is used for gathering the electricity that cathode voltage observation circuit 7 and cathode voltage observation circuit 8 monitor
Pressure, gives mcu91 decision-making, and described current acquisition module 93 is used for gathering the size of current of direct current Hall element 4, gives
Mcu91 decision-making, described output module 94 receives the control signal of mcu91, and then controls high-voltage relay 6, described modular converter
The control signal of 95 reception mcu91, and then adjust the size of adjustable dc source 2 output voltage.
A kind of for inverter suppress photovoltaic module pid phenomenon device it is characterised in that: include resistance 1, can adjust straight
Stream power supply 2, direct current Hall element 4, fuse 5, high-voltage relay 6 and controller 9, described resistance 1, adjustable dc source
2, direct current Hall element 4, fuse 5, high-voltage relay 6 is connected between bus negative pole and the earth, described controller 9 one end
Connect adjustable dc source 2, one end connects direct current Hall element 4, and one end connects high-voltage relay 6.
Described adjustable dc source 2 is also parallel with diode 3, the adjustable direct current of conducting termination of described diode 3
The negative pole in source 2.
It is also associated with cathode voltage observation circuit 7, described cathode voltage observation circuit 7 between described bus negative pole and the earth
Connect controller 9.
It is also associated with cathode voltage observation circuit 8, described cathode voltage observation circuit 8 between described bus positive pole and the earth
Connect controller 9.
Described controller 9 includes mcu91, voltage acquisition module 92, current acquisition module 93, output module 94 and modulus of conversion
Block 95, described voltage acquisition module 92 one end connects cathode voltage observation circuit 7 and cathode voltage observation circuit 8, and one end connects
Mcu91, described current acquisition module 93 one end connects Hall element 4, and one end connects mcu91, described output module 94 one end
Connect mcu91, one end connects high-voltage relay 6, described modular converter 95 one end connects mcu91, one end connects adjustable direct current
Power supply 2.
A kind of method and device advantage suppressing photovoltaic module pid phenomenon for inverter is:
1) " the unearthed system " of photovoltaic system is not directly made into " being directly grounded " system；
2) ensure the forward bias of negative pole voltage-to-ground, preferably eliminate and containment pid phenomenon；
3) system is not required to disconnect inverter, also can use in photovoltaic system normal power generation, the scope of application is wider；
4) system has multiple safety protection measure, high safety；
5) system has extensibility, and function can increase according to need, for example, report to the police, and information exchanges etc., can be directly mounted at
In inverter, and realize the data exchange with inverter.
Brief description
Fig. 1 is a kind of structure chart of the method and device suppressing photovoltaic module pid phenomenon for inverter；
Fig. 2 is a kind of schematic diagram of the method and device suppressing photovoltaic module pid phenomenon for inverter；
Fig. 3 is the annexation figure of controller 9；
In figure: 1, resistance, 2, adjustable dc source, 3, diode, 4, direct current Hall element, 5, fuse, 6, high
Potential relay, 7, cathode voltage observation circuit, 8, cathode voltage observation circuit, 9, controller.
Specific embodiment
It is further elaborated with reference to embodiment:
Series resistor 1 on bus negative pole between inverter and header box, adjustable dc source 2, direct current Hall passes
Sensor 4, fuse 5 and high-voltage relay 6, are grounded afterwards, and the positive pole of adjustable dc source 2 connects bus negative pole direction；Adjustable
Section dc source 2 is parallel with diode 3, the negative pole of the adjustable dc source 2 of conducting termination of diode 3.Bus negative pole and big
It is connected with cathode voltage observation circuit 7 between ground, between bus positive pole and the earth, is connected with cathode voltage observation circuit 8, control
Device 9 is respectively with direct current Hall element 4, high-voltage relay 6, cathode voltage observation circuit 7 and cathode voltage observation circuit 8 company
Connect.
Controller 9 includes mcu91, voltage acquisition module 92, current acquisition module 93, output module 94 and modular converter
95, voltage acquisition module 92 is used for gathering the voltage that cathode voltage observation circuit 7 and cathode voltage observation circuit 8 monitor, send
To mcu91 decision-making, current acquisition module 93 is used for gathering the size of current of direct current Hall element 4, gives mcu91 decision-making；Defeated
Go out the control signal that module 94 receives mcu91, the wherein control signal of mcu91 according to direct current Hall element 4, cathode voltage is supervised
Determine after the signal transacting of slowdown monitoring circuit 7 and cathode voltage observation circuit 8, and then control high-voltage relay 6；Modular converter 95 receives
The control signal of the control signal of mcu91, wherein mcu91 according to direct current Hall element 4, cathode voltage observation circuit 7 and just
Determine after the signal transacting of pole tension observation circuit 8, and then adjust the size of adjustable dc source 2 output voltage.
Bus negative pole potential to ground is made to be slightly larger than 0 and basic holding the present invention seeks to forward voltage is added on bus negative pole
Stable, because the current potential of bus negative pole is in the generation substantially eliminating pid phenomenon for timing, simultaneously because voltage is high, flow into the earth
Electric current big, series resistor is depressured it is ensured that equipment and personal security.Receive direct current Hall element 4 by controller 9 to feel
The earth current signal that should arrive, controls the regulation of adjustable dc source 2, and dynamic regulation makes inverter direct-flow side bus bear
Electrode potential is slightly above ground potential and relatively stable.
The impedance of assembly array there may be change, leads to the voltage on resistance 1 in device change, impact bus is born
The potential size of pole, then bus cathode voltage is monitored by cathode voltage observation circuit 7, give controller 9, and then more reasonably
Control the regulation of adjustable dc source 2.
Controller 9 can monitor the voltage of bus positive pole by cathode voltage observation circuit 8, when the voltage of bus positive pole exceeds
During setting value u2, control high-voltage relay 6 to close earthed circuit, protection circuit safety, and point out operating personnel with warning device
Carry out associative operation；When impact in the earth current that direct current Hall element 4 senses or when excessive, controller 9 controls
High-voltage relay 6 cuts out earthed circuit, protects personal security, and sends warning.
Resistance 1 is 50k ω, and the blow-out current value of fuse 5 is more than 2a, and direct current Hall element 4 sets protective current value
For 10ma, the cathode voltage between bus negative pole and the earth sets and maintains 10v, the cathode voltage between bus positive pole and the earth
Set and be less than u2, wherein u1 voltage is to be determined by u2 voltage and photovoltaic system voltage.
Resistance 1 is used for during bus minus earth reducing current value, and adjustable dc source 2 is used for raising the electricity of bus negative pole
Position；Diode 3 plays sustainable protection effect, prevents system charging current from components and parts are damaged；Direct current Hall element 4 is supervised
The electric current that flow measurement is crossed, fuse 5 is used for overcurrent protection, and high-voltage relay 6 shields under the control of controller 9；Negative pole
Voltage between electric voltage observation circuit 7 monitoring bus negative pole and the earth, cathode voltage observation circuit 8 monitors bus positive pole and the earth
Voltage, and voltage signal is given controller 9 carry out logic control, controller 9 controls adjustable dc source 2 to realize linearly connecting
The change of continuous property.
Claims (4)
1. a kind of method suppressing photovoltaic module pid phenomenon for inverter suppresses light it is characterised in that one kind is used for inverter
The step of the method for volt assembly pid phenomenon is as follows:
1) series resistor (1) on the bus negative pole of photovoltaic system, adjustable dc source (2), direct current Hall element (4),
Fuse (5) and high-voltage relay (6), are grounded afterwards, and the positive pole of described adjustable dc source (2) connects bus negative pole direction；
2) gather, with controller (9), the size of current that direct current Hall element (4) monitors, when direct current Hall element (4) prison
During the curent change measuring, controller (9) adjusts the voltage swing on adjustable dc source (2), improves regulating effect, works as prison
When the electric current measuring exceedes default protective current size, controller (9) controls high-voltage relay (6) disconnecting circuit；
Described adjustable dc source (2) is also parallel with diode (3), the adjustable direct current of conducting termination of described diode (3)
The negative pole of power supply (2), in order to protect adjustable dc source (2), by negative pole, backward voltage over the ground is not affected；
It is also associated with cathode voltage observation circuit (7), described cathode voltage observation circuit (7) between described bus negative pole and the earth
The voltage monitoring is given controller (9) and is carried out logical decision, and then controls adjustable dc source (2) and high-voltage relay
(6)；
It is also associated with cathode voltage observation circuit (8), described cathode voltage observation circuit (8) between described bus positive pole and the earth
The voltage monitoring is given controller (9) and is carried out logical decision, and then controls adjustable dc source (2) and high-voltage relay
(6).
2. according to claim 1 a kind of for inverter suppress photovoltaic module pid phenomenon method it is characterised in that:
Described controller (9) includes mcu(91), voltage acquisition module (92), current acquisition module (93), output module (94) and conversion
Module (95), described voltage acquisition module (92) is used for gathering cathode voltage observation circuit (7) and cathode voltage observation circuit (8)
The voltage monitoring, gives mcu(91) decision-making, described current acquisition module (93) is used for gathering direct current Hall element (4)
Size of current, gives mcu(91) decision-making, described output module (94) receives mcu(91) control signal, and then control high pressure to continue
Electrical equipment (6), described modular converter (95) receives mcu(91) control signal, and then adjust adjustable dc source (2) output electricity
The size of pressure.
3. a kind of for inverter suppress photovoltaic module pid phenomenon device it is characterised in that: include resistance (1), can adjust straight
Stream power supply (2), direct current Hall element (4), fuse (5), high-voltage relay (6) and controller (9), described resistance (1), can
Adjust dc source (2), direct current Hall element (4), fuse (5), high-voltage relay (6) is connected on bus negative pole and the earth
Between, described controller (9) one end connects adjustable dc source (2), and one end connects direct current Hall element (4), and one end is even
Connect high-voltage relay (6)；
Described adjustable dc source (2) is also parallel with diode (3), the adjustable direct current of conducting termination of described diode (3)
The negative pole of power supply (2)；
It is also associated with cathode voltage observation circuit (7), described cathode voltage observation circuit (7) between described bus negative pole and the earth
Connect controller (9)；
It is also associated with cathode voltage observation circuit (8), described cathode voltage observation circuit (8) between described bus positive pole and the earth
Connect controller (9).
4. according to claim 3 a kind of for inverter suppress photovoltaic module pid phenomenon device it is characterised in that:
Described controller (9) includes mcu(91), voltage acquisition module (92), current acquisition module (93), output module (94) and conversion
Module (95), described voltage acquisition module (92) one end connects cathode voltage observation circuit (7) and cathode voltage observation circuit
(8), one end connects mcu(91), described current acquisition module (93) one end connects Hall element (4), and one end connects mcu
(91), described output module (94) one end connects mcu(91), one end connects high-voltage relay (6), described modular converter (95)
End connects mcu(91), one end connects adjustable dc source (2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510052612.XA CN104617873B (en) | 2015-02-02 | 2015-02-02 | Method and device for suppressing potential induced degradation (PID) phenomenon of photovoltaic module through inverter |
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| CN201510052612.XA CN104617873B (en) | 2015-02-02 | 2015-02-02 | Method and device for suppressing potential induced degradation (PID) phenomenon of photovoltaic module through inverter |
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| CN106018967B (en) * | 2016-05-12 | 2018-03-20 | 国网江苏省电力公司常州供电公司 | The online insulation against ground safety monitoring assembly of distributed photovoltaic system |
| CN206595959U (en) * | 2017-03-30 | 2017-10-27 | 北京铂阳顶荣光伏科技有限公司 | A kind of photovoltaic DC earthing or grounding means |
| CN107492907B (en) * | 2017-08-29 | 2024-04-12 | 武汉协鑫新能源电力设计有限公司 | Control device with PID (proportion integration differentiation) inhibition and restoration functions and control method thereof |
| JP7021478B2 (en) | 2017-09-04 | 2022-02-17 | オムロン株式会社 | Photovoltaic system and transducer |
| CN107493057A (en) * | 2017-09-22 | 2017-12-19 | 北京铂阳顶荣光伏科技有限公司 | The electric regulating system and method for a kind of potential induction attenuation of photovoltaic generation |
| CN110187222B (en) * | 2019-05-28 | 2022-09-06 | 厦门科华数能科技有限公司 | Bus wiring fault detection circuit and fault determination method |
| ES1274659Y (en) * | 2021-06-23 | 2021-10-22 | Esteso David Parra | EQUIPMENT FOR DETECTION OF FAULTS OR EARTH DEFECTS IN ELECTRIC ENERGY GENERATION FACILITIES WITH PHOTOVOLTAIC MODULES |
| CN115528649A (en) * | 2022-09-28 | 2022-12-27 | 华为数字能源技术有限公司 | Photovoltaic system and circuit protection method of photovoltaic system |
| CN116722815B (en) * | 2023-08-08 | 2023-12-05 | 锦浪科技股份有限公司 | PID effect suppression system, control method thereof and photovoltaic system |
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| JPH02264301A (en) * | 1989-04-04 | 1990-10-29 | Toshiba Corp | Process control device |
| JP2010044591A (en) * | 2008-08-12 | 2010-02-25 | Toshiba Corp | Plant controller and method |
| KR20120087424A (en) * | 2011-01-28 | 2012-08-07 | 순천대학교 산학협력단 | AC Generating PV Module |
| 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 |
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