CN205792451U - A kind of failure detector of photovoltaic parallel in system - Google Patents
A kind of failure detector of photovoltaic parallel in system Download PDFInfo
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- CN205792451U CN205792451U CN201620505843.1U CN201620505843U CN205792451U CN 205792451 U CN205792451 U CN 205792451U CN 201620505843 U CN201620505843 U CN 201620505843U CN 205792451 U CN205792451 U CN 205792451U
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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
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Abstract
The utility model discloses the failure detector of a kind of photovoltaic parallel in system, it includes photovoltaic array, electric energy conversion module, comparison and detection module and fault detection module, photovoltaic array solar energy be converted to direct current energy and export to electric energy conversion module；Direct current energy is converted to AC energy and the real output of current photovoltaic array is sent to fault detection module by electric energy conversion module；The comparison and detection module detection temperature of current environment and intensity of sunshine are also sent to fault detection module；Fault detection module draws the anticipated output of photovoltaic array according to the efficiency calculation of temperature, intensity of sunshine and the electric energy conversion module of current environment, and described anticipated output is contrasted with real output, output detections result, can be by the real output of contrast photovoltaic array and anticipated output, judge current photovoltaic parallel in system whether operation irregularity, achieve the real-time fault detection of photovoltaic parallel in system, substantially increase the safety of its work.
Description
Technical field
This utility model relates to photovoltaic parallel in system technical field, particularly to the fault detect of a kind of photovoltaic parallel in system
Device.
Background technology
Along with becoming increasingly conspicuous of environmental problem, the problem that traditional wide area bulk power grid stability, reliability, safety run
Emerge in large numbers, force people to direct attention to cleaning, the utilization of green regenerative resource.Solar photovoltaic industry has huge
Market potential and development space, be not only always maintained at the development speed more than 50% in past 10 years, in coming 10 years also
By expansion continuously and healthily.
Along with quantity and the Rapid Expansion of scale of distributed photovoltaic power generation system Construction, the maintenance of photovoltaic system is increasingly
Become a white elephant of operating agency.Generally run in the case of unmanned due to photovoltaic system, the system failure
May result in whole system output and efficiency reduces, the most how affect the operation of whole system time serious
The operation conditions of auto-real-time monitoring photovoltaic generating system is the problem needing solution badly.
Thus prior art could be improved and improve.
Utility model content
In place of above-mentioned the deficiencies in the prior art, the purpose of this utility model is to provide a kind of photovoltaic parallel in system
Failure detector, can be by the real output of contrast photovoltaic array and the anticipated output work calculated according to current environment
Rate, it is judged that current photovoltaic parallel in system whether operation irregularity, it is achieved that the real-time fault detection of photovoltaic parallel in system, is greatly improved
The safety of its work.
In order to achieve the above object, this utility model takes techniques below scheme:
The failure detector of a kind of photovoltaic parallel in system, including photovoltaic array, it also includes electric energy conversion module, contrast
Detection module and fault detection module, be converted to solar energy direct current energy by photovoltaic array and export to electric energy modulus of conversion
Block；Direct current energy is converted to AC energy and the real output of current photovoltaic array is sent to event by electric energy conversion module
Barrier detection module；The comparison and detection module detection temperature of current environment and intensity of sunshine are also sent to fault detection module；Fault
Detection module draws the anticipated of photovoltaic array according to the efficiency calculation of temperature, intensity of sunshine and the electric energy conversion module of current environment
Output, and described anticipated output is contrasted with real output, output detections result.
In the failure detector of described photovoltaic parallel in system, described electric energy conversion module includes MPPT controller and light
Volt combining inverter, is converted to AC energy by photovoltaic combining inverter by described direct current energy and exports to ac output end, and
The conversion efficiency of photovoltaic combining inverter is sent to fault detection module；The reality current by MPPT controller detection photovoltaic array
Border output is also sent to fault detection module, the control efficiency of MPPT controller is also sent to fault detect mould simultaneously
Block.
In the failure detector of described photovoltaic parallel in system, described comparison and detection module includes working as front ring for detection
The temperature sensor of border temperature and for detecting the standard solar cells of current intensity of sunshine, described temperature sensor and standard
Solaode all electrically connects with fault detection module.
In the failure detector of described photovoltaic parallel in system, described fault detection module includes estimating unit and contrast
Unit, is controlled by estimating the unit temperature according to current environment, intensity of sunshine, the conversion efficiency of photovoltaic combining inverter and MPPT
The control efficiency of device calculates the anticipated output of photovoltaic array and exports to contrasting unit；Contrast unit is by described anticipated
Output contrasts with real output, judges current light according to the size of described anticipated output and real output
Volt grid-connected system is the most working properly.
In the failure detector of described photovoltaic parallel in system, described in estimate unit and include MCU, described contrast unit bag
Include the first resistance, the second resistance, the 3rd resistance, the 4th resistance, rheostat, the first electric capacity, the second electric capacity, the first operation amplifier
Device, the second operational amplifier, the first display lamp and the second display lamp, one end of described first resistance connects (OC1A) PD5 of MCU
End, the other end of described first resistance is connected VCC feeder ear by rheostatic two terminals, is connect also by the first electric capacity
Ground；Described rheostatic slide plate end connects positive input terminal and the negative input end of the second operational amplifier of the first operational amplifier；
The negative input end of described first operational amplifier and the positive input terminal of described second operational amplifier connect MCU by the second electric capacity
GND end, also by the 4th resistance connect MCU (OC1B) PD4 end；The outfan of described first operational amplifier passes through second
Resistance connects negative pole and the positive pole of the second display lamp of the first display lamp；The outfan of described second operational amplifier passes through the 3rd
Resistance connects positive pole and the negative pole of the second display lamp of the first display lamp.
In the failure detector of described photovoltaic parallel in system, described MCU uses model to be the place of ATMEGA16-16PU
Reason device.
In the failure detector of described photovoltaic parallel in system, described standard solar cells uses model to be NBET-
The standard solar cells of RC22.
Compared to prior art, the failure detector of the photovoltaic parallel in system that this utility model provides includes photovoltaic battle array
Row, electric energy conversion module, comparison and detection module and fault detection module, be converted to direct current energy by photovoltaic array by solar energy
And export to electric energy conversion module；Direct current energy is converted to AC energy the reality by current photovoltaic array by electric energy conversion module
Border output is sent to fault detection module；The comparison and detection module detection temperature of current environment and intensity of sunshine are also sent to
Fault detection module；Fault detection module is according to the efficiency calculation of temperature, intensity of sunshine and the electric energy conversion module of current environment
Drawing the anticipated output of photovoltaic array, and contrasted with real output by described anticipated output, output detections is tied
Really, can be by the real output of contrast photovoltaic array and the anticipated output calculated according to current environment, it is judged that current
Photovoltaic parallel in system whether operation irregularity, it is achieved that the real-time fault detection of photovoltaic parallel in system, substantially increases its work
Safety.
Accompanying drawing explanation
The schematic diagram of the failure detector of the photovoltaic parallel in system that Fig. 1 provides for this utility model.
Detailed description of the invention
This utility model provides the failure detector of a kind of photovoltaic parallel in system, can be by contrasting the reality of photovoltaic array
Output and the anticipated output calculated according to current environment, it is judged that current photovoltaic parallel in system whether operation irregularity, real
Show the real-time fault detection of photovoltaic parallel in system, substantially increase the safety of its work.
For making the purpose of this utility model, technical scheme and effect clearer, clear and definite, develop simultaneously enforcement referring to the drawings
This utility model is further described by example.Should be appreciated that specific embodiment described herein is only in order to explain this practicality
Novel, it is not used to limit this utility model.
Refer to Fig. 1, the failure detector of the photovoltaic parallel in system that this utility model provides, including photovoltaic array 10,
Electric energy conversion module 20, comparison and detection module 30 and fault detection module 40, be converted to solar energy directly by photovoltaic array 10
Stream electric energy also exports to electric energy conversion module 20；Direct current energy is converted to AC energy and by current light by electric energy conversion module 20
The real output of photovoltaic array 10 is sent to fault detection module 40；Comparison and detection module 30 detect current environment temperature and
Intensity of sunshine is also sent to fault detection module 40；Fault detection module 40 is according to temperature, intensity of sunshine and the electricity of current environment
The efficiency calculation of energy modular converter 20 draws the anticipated output of photovoltaic array 10, and by described anticipated output with actual
Output contrasts, output detections result, by the real output of contrast contrast photovoltaic array 10 with according to current environment
The anticipated output calculated, it is judged that current photovoltaic parallel in system whether operation irregularity, it is achieved that on-line real-time measuremen photovoltaic system
The fault of system, improves the safety that system is run.
Further, described electric energy conversion module 20 includes MPPT controller 201 and photovoltaic combining inverter 202, by light
Described direct current energy is converted to AC energy and exports to ac output end by volt combining inverter 202, and by photovoltaic grid-connected inversion
The conversion efficiency of device 202 is sent to fault detection module 40；The reality being detected photovoltaic array 10 current by MPPT controller 201 is defeated
Go out power and be sent to fault detection module 40, the control efficiency of MPPT controller 201 being also sent to fault detect mould simultaneously
Block 40, when being embodied as, MPPT controller 201 detects DC voltage and the output electric current of photovoltaic array 10 output in real time, thus
Obtain its output, due to MPPT controller 201 can not absolutely follow the tracks of the maximum power point of photovoltaic parallel in system and its
Itself having certain power attenuation, therefore there is control efficiency, equally, direct current energy is changed by photovoltaic combining inverter 202
For AC energy, conversion efficiency can change according to real-time behavior, by conversion efficiency and the MPPT of photovoltaic combining inverter 202
The control efficiency of controller 201 is sent to fault detection module 40 so that fault detection module 40 is to anticipated defeated under current environment
The calculating accuracy rate going out power is higher, thus improves the accuracy that duty judges.
Further, described comparison and detection module 30 includes the temperature sensor 301 for detecting current environmental temperature
With the standard solar cells 302 for detecting current intensity of sunshine, described temperature sensor 301 and standard solar cells
302 all electrically connect with fault detection module 40, when being embodied as, detect current ambient temperature by temperature sensor 301, logical
Crossing standard solar cells 302 and detect current intensity of sunshine, fault detection module 40 is pre-according to Current Temperatures and intensity of sunshine
Estimating the output of photovoltaic array 10 under current environment, wherein said standard solar cells 302 can use model to be NBET-
The standard solar cells 302 of RC22, its area is 20mm × 20mm, certainly may be used without the standard solar-electricity of other models
Pond 302, this is not construed as limiting by this utility model.
Please continue to refer to Fig. 1, described fault detection module 40 includes estimating unit 401 and contrast unit 402, by estimating list
Unit 401 is according to temperature, intensity of sunshine, the conversion efficiency of photovoltaic combining inverter 202 and the MPPT controller 201 of current environment
Control efficiency calculates the anticipated output of photovoltaic array 10 and exports to contrast unit 402；Contrast unit 402 is by described
Anticipated output contrasts with real output, judges to work as according to the size of described anticipated output and real output
Front photovoltaic parallel in system is the most working properly.Specifically, big less than anticipated output and both differences when real output
When equal to predetermined threshold value, it is judged that current photovoltaic parallel in system operation irregularity；When real output less than anticipated output,
And both differences are less than predetermined threshold value or real output more than or equal to when estimating output, it is judged that current grid-connected system
Unite working properly.
Described estimate unit 401 include MCU, described contrast unit 402 include the first resistance R1, the second resistance R2, the 3rd
Resistance R3, the 4th resistance R4, rheostat RP, the first electric capacity C1, the second electric capacity C2, first operational amplifier A the 1, second computing are put
One end of big device A2, the first display lamp LED1 and the second display lamp LED1, described first resistance R1 connects (OC1A) PD5 of MCU
End, the other end of described first resistance R1 connects VCC feeder ear by two terminals of rheostat RP, also by the first electric capacity
C1 ground connection；The slide plate end of described rheostat RP connects the positive input terminal of the first operational amplifier A 1 and the second operational amplifier A 2
Negative input end；The negative input end of described first operational amplifier A 1 and the positive input terminal of described second operational amplifier A 2 connect logical
Cross the second electric capacity C2 to connect the GND end of MCU, connect (OC1B) PD4 end of MCU also by the 4th resistance R4；Described first computing
The outfan of amplifier A1 connects negative pole and the positive pole of the second display lamp LED1 of the first display lamp LED1 by the second resistance R2；
The outfan of described second operational amplifier A 2 connects positive pole and second instruction of the first display lamp LED1 by the 3rd resistance R3
The negative pole of lamp LED1, wherein said MCU uses model to be the processor of ATMEGA16-16PU, certainly may be used without other and have
The processor of identical function, this is not construed as limiting by this utility model.
When being embodied as, MCU is strong according to photovoltaic array 10 region characteristic predictor method and the temperature of current environment, sunshine
The control efficiency of degree, the conversion efficiency of photovoltaic combining inverter 202 and MPPT controller 201 calculates the pre-of photovoltaic array 10
Meter output, sends real output and anticipated output to host computer simultaneously, can be according to real work situation pair
MCU sends control instruction.Additionally rheostat RP is used for setting predetermined threshold, and the slide plate end of rheostat RP connects the first operation amplifier
The positive input terminal of device A1 and the negative input end of the second operational amplifier A 2, and MCU is by the first computing of real output output valve
The negative input end of amplifier A1 and the positive input terminal of the second operational amplifier A 2, when real output is more than or equal to anticipated output
Power, or when real output is less than predetermined threshold value less than anticipated output and both differences, it is judged that current photovoltaic is also
Net system is working properly, now the first signal lights conducting, the normal signal of output services；When real output is defeated less than anticipated
When going out power and both differences more than or equal to predetermined threshold value, it is judged that current photovoltaic parallel in system operation irregularity, now secondary signal
Lamp turns on, and the signal that output services are abnormal, specifically, described first signal lights can use green light LED lamp, described secondary signal lamp
Red LED lamp can be used, enable users to the clear duty finding out current photovoltaic parallel in system, and make corresponding position
Reason, improves treatment effeciency.
Power to photovoltaic array 10 is estimated and is described in detail below.In photovoltaic parallel in system, typically use photovoltaic
System is analyzed by the engineering model of array 10.Engineering model is learning that with environmental correclation four key property parameters are (short
Road electric current, open-circuit voltage, maximum power point voltage and maximum power point electric current) just can to reduce the characteristic of photovoltaic array 10 bent
Line.Therefore, can be when system debug be installed, to detecting site environment temperature by temperature sensor 301, by standard solar energy
Battery 302 detect intensity of sunshine, by the short circuit current of photovoltaic array 10 in MPPT controller 201 detecting system, open-circuit voltage,
Maximum power point voltage and maximum power point electric current.According to above-mentioned testing result, can be strong to any sunshine in conjunction with equation below
Under degree, temperature conditions, the peak power output of photovoltaic array 10 is estimated.
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
Wherein, coefficient a, the representative value of b, c is:,,；For standard bar
Intensity of sunshine under part；For temperature value under standard conditions, according to the test condition of standard solar cells 302,For
1000W/m2,It it is 25 DEG C；、,、、、The short circuit of photovoltaic array 10 when being respectively system installation and debugging
Electric current, open-circuit voltage, maximum power point electric current, maximum power point voltage, intensity of sunshine and temperature；、,、、、When respectively system is run, the short circuit current of photovoltaic array 10 under new environment, open-circuit voltage, maximum power point electric current,
High-power point voltage and intensity of sunshine and temperature.
Estimate situation according to above-mentioned, the peak power output of photovoltaic array 10 can be obtained.It is as previously mentioned
, owing to MPPT controller 201 can not very follow the tracks of the maximum power point of system, simultaneously MPPT controller 201 tool itself
There is certain power attenuation, and itself there is certain power attenuation, therefore there is control efficiency.Equally, light
The efficiency of volt combining inverter 202 has certain change also according to real-time behavior, defines photovoltaic combining inverter 202 for this
Conversion efficiency be.Thus, can estimate whole system output is
, meanwhile, detect photovoltaic system real outputP 2, the most rightP 1WithP 2Data carry out record and relative analysis, can be to being
System the most normally work judges.
In sum, the failure detector of the photovoltaic parallel in system that this utility model provides includes photovoltaic array, electric energy
Modular converter, comparison and detection module and fault detection module, be converted to solar energy direct current energy by photovoltaic array and export
To electric energy conversion module；Direct current energy is converted to AC energy and by the actual output of current photovoltaic array by electric energy conversion module
Power is sent to fault detection module；The comparison and detection module detection temperature of current environment and intensity of sunshine are also sent to fault inspection
Survey module；Fault detection module draws light according to the efficiency calculation of temperature, intensity of sunshine and the electric energy conversion module of current environment
The anticipated output of photovoltaic array, and described anticipated output is contrasted with real output, output detections result, can lead to
The real output crossing contrast photovoltaic array and the anticipated output calculated according to current environment, it is judged that the most grid-connected
System whether operation irregularity, it is achieved that the real-time fault detection of photovoltaic parallel in system, substantially increases the safety of its work.
It is understood that for those of ordinary skills, can according to the technical solution of the utility model and
Its utility model conceives in addition equivalent or change, and all these change or replace all should belong to appended by this utility model
Scope of the claims.
Claims (7)
1. a failure detector for photovoltaic parallel in system, including photovoltaic array, it is characterised in that also include electric energy modulus of conversion
Block, comparison and detection module and fault detection module, be converted to solar energy direct current energy by photovoltaic array and export to electric energy
Modular converter；Direct current energy is converted to AC energy and is sent out by the real output of current photovoltaic array by electric energy conversion module
Deliver to fault detection module；The comparison and detection module detection temperature of current environment and intensity of sunshine are also sent to fault detect mould
Block；Fault detection module draws photovoltaic battle array according to the efficiency calculation of temperature, intensity of sunshine and the electric energy conversion module of current environment
The anticipated output of row, and described anticipated output is contrasted with real output, output detections result.
The failure detector of photovoltaic parallel in system the most according to claim 1, it is characterised in that described electric energy modulus of conversion
Block includes MPPT controller and photovoltaic combining inverter, photovoltaic combining inverter described direct current energy is converted to AC energy
Output is to ac output end, and the conversion efficiency of photovoltaic combining inverter is sent to fault detection module；By MPPT controller
Detect the current real output of photovoltaic array and be sent to fault detection module, simultaneously by the control efficiency of MPPT controller
It is also sent to fault detection module.
The failure detector of photovoltaic parallel in system the most according to claim 1, it is characterised in that described comparison and detection mould
Block includes the temperature sensor for detecting current environmental temperature and for detecting the standard solar cells of current intensity of sunshine,
Described temperature sensor and standard solar cells all electrically connect with fault detection module.
The failure detector of photovoltaic parallel in system the most according to claim 2, it is characterised in that described fault detect mould
Block includes estimating unit and contrast unit, by estimating the unit temperature according to current environment, intensity of sunshine, photovoltaic combining inverter
Conversion efficiency and the control efficiency of MPPT controller calculate the anticipated output of photovoltaic array and export to contrasting list
Unit；Described anticipated output is contrasted by contrast unit with real output, defeated according to described anticipated output and reality
The size going out power judges that current photovoltaic parallel in system is the most working properly.
The failure detector of photovoltaic parallel in system the most according to claim 4, it is characterised in that described in estimate unit bag
Include MCU, described contrast unit include the first resistance, the second resistance, the 3rd resistance, the 4th resistance, rheostat, the first electric capacity,
Two electric capacity, the first operational amplifier, the second operational amplifier, the first display lamp and the second display lamp, the one of described first resistance
End connects (OC1A) PD5 end of MCU, and the other end of described first resistance connects VCC by rheostatic two terminals and powers
Hold, also by the first capacity earth；Described rheostatic slide plate end connects positive input terminal and second fortune of the first operational amplifier
Calculate the negative input end of amplifier；The negative input end of described first operational amplifier and the positive input terminal of described second operational amplifier
Connect the GND end of MCU by the second electric capacity, connect (OC1B) PD4 end of MCU also by the 4th resistance；Described first computing is put
The outfan of big device connects negative pole and the positive pole of the second display lamp of the first display lamp by the second resistance；Described second computing is put
The outfan of big device connects positive pole and the negative pole of the second display lamp of the first display lamp by the 3rd resistance.
The failure detector of photovoltaic parallel in system the most according to claim 5, it is characterised in that described MCU employing type
It number it is the processor of ATMEGA16-16PU.
The failure detector of photovoltaic parallel in system the most according to claim 3, it is characterised in that described standard solar energy
Battery uses model to be the standard solar cells of NBET-RC22.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620505843.1U CN205792451U (en) | 2016-05-30 | 2016-05-30 | A kind of failure detector of photovoltaic parallel in system |
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| CN201620505843.1U CN205792451U (en) | 2016-05-30 | 2016-05-30 | A kind of failure detector of photovoltaic parallel in system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108551330A (en) * | 2018-06-22 | 2018-09-18 | 浙江源控节能科技有限公司 | A kind of photovoltaic module array monitoring system and monitoring method |
| CN109901003A (en) * | 2017-12-11 | 2019-06-18 | 中国电力科学研究院有限公司 | A kind of inverter power fault detection method and system |
| CN111443253A (en) * | 2020-04-17 | 2020-07-24 | 福州大学 | Power electronic equipment soft fault diagnosis method and system based on conversion efficiency |
| CN112751357A (en) * | 2019-10-31 | 2021-05-04 | 比亚迪股份有限公司 | Photovoltaic energy storage system and control method thereof |
| CN113203903A (en) * | 2021-04-27 | 2021-08-03 | 合肥工业大学 | Method for detecting and positioning cause of DC side fault of photovoltaic inverter |
| TWI750647B (en) * | 2020-05-05 | 2021-12-21 | 盈正豫順電子股份有限公司 | Maintenance abnormality detection method and system for photovoltaic modules or module strings |
| CN115996022A (en) * | 2023-02-21 | 2023-04-21 | 华能新疆吉木萨尔新能源有限公司 | Photovoltaic module fault detection method and system |
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- 2016-05-30 CN CN201620505843.1U patent/CN205792451U/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109901003A (en) * | 2017-12-11 | 2019-06-18 | 中国电力科学研究院有限公司 | A kind of inverter power fault detection method and system |
| CN109901003B (en) * | 2017-12-11 | 2022-08-09 | 中国电力科学研究院有限公司 | Inverter power fault detection method and system |
| CN108551330A (en) * | 2018-06-22 | 2018-09-18 | 浙江源控节能科技有限公司 | A kind of photovoltaic module array monitoring system and monitoring method |
| CN108551330B (en) * | 2018-06-22 | 2024-06-04 | 浙江源控节能科技有限公司 | Photovoltaic module array monitoring system and monitoring method |
| CN112751357A (en) * | 2019-10-31 | 2021-05-04 | 比亚迪股份有限公司 | Photovoltaic energy storage system and control method thereof |
| CN111443253A (en) * | 2020-04-17 | 2020-07-24 | 福州大学 | Power electronic equipment soft fault diagnosis method and system based on conversion efficiency |
| CN111443253B (en) * | 2020-04-17 | 2021-07-23 | 福州大学 | Power electronic equipment soft fault diagnosis method and system based on conversion efficiency |
| TWI750647B (en) * | 2020-05-05 | 2021-12-21 | 盈正豫順電子股份有限公司 | Maintenance abnormality detection method and system for photovoltaic modules or module strings |
| CN113203903A (en) * | 2021-04-27 | 2021-08-03 | 合肥工业大学 | Method for detecting and positioning cause of DC side fault of photovoltaic inverter |
| CN113203903B (en) * | 2021-04-27 | 2022-05-03 | 合肥工业大学 | Method for detecting and positioning cause of DC side fault of photovoltaic inverter |
| CN115996022A (en) * | 2023-02-21 | 2023-04-21 | 华能新疆吉木萨尔新能源有限公司 | Photovoltaic module fault detection method and system |
| CN115996022B (en) * | 2023-02-21 | 2024-01-23 | 华能新疆吉木萨尔新能源有限公司 | Photovoltaic module fault detection method and system |
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