CN108551330A - A kind of photovoltaic module array monitoring system and monitoring method - Google Patents
A kind of photovoltaic module array monitoring system and monitoring method Download PDFInfo
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- CN108551330A CN108551330A CN201810653129.0A CN201810653129A CN108551330A CN 108551330 A CN108551330 A CN 108551330A CN 201810653129 A CN201810653129 A CN 201810653129A CN 108551330 A CN108551330 A CN 108551330A
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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
- H02S50/10—Testing of PV devices, e.g. of PV modules or single PV cells
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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
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Abstract
The present invention provides a kind of photovoltaic module array monitoring system and monitoring method, the system comprises：Several solar radiation power test modules, several front end control modules, direct current conflux case, gird-connected inverter, rear end control module, cutting-in control case and system controller；Each front end control module connects photovoltaic module array all the way, several front end control modules connect a solar radiation power test module, each front end control module is connected with direct current conflux case and system controller respectively, and the direct current conflux case, gird-connected inverter and rear end control module are sequentially connected；System controller is used for the result of calculation of receiving front-end control module and rear end control module, and is positioned to the photovoltaic module array of failure according to result of calculation；When the monitoring system and method solve photovoltaic plant working condition appearance exception, the problem of can not being positioned to the photovoltaic module array of failure, the stable operation of photovoltaic plant ensure that.
Description
Technical field
The present invention relates to photovoltaic generation fault detection technique fields, are monitored more particularly, to a kind of photovoltaic module array
System and monitoring method.
Background technology
Photovoltaic generation is used as a kind of very clean energy at present, is received by the market.Photovoltaic generation is imitated using photoelectricity
The luminous energy of radiation should be converted into electric energy, and the power generation of AC network is incorporated to via gird-connected inverter by solar panel
System.Photo-voltaic power generation station is made of multichannel photovoltaic module array, header box, gird-connected inverter and cutting-in control case, photovoltaic hair
Power station is typically designed as the service life of decades, so becoming particularly important to the operation management of photo-voltaic power generation station.
It is more commonly used by the real-time generated energy of network remote monitoring and statistics in existing photovoltaic plant operation management mode
And a kind of more mature technical solution.This technical solution can only realize voltage, electric current, work(to being incorporated to AC network end
The data such as rate, electricity are monitored, and then coordinate some meteorological datas to judge whether photovoltaic plant operation is normal.So this
Kind of monitoring mode can only judge whether the operation of entire photovoltaic plant is normal, can not be to causing the equipment of photovoltaic plant operation exception
Or block is accurately positioned, this causes difficulty to the maintenance work of maintenance personal, becomes current field of photovoltaic power generation urgently
A problem to be solved.
Invention content
The purpose of the present invention is to provide a kind of photovoltaic module array monitoring system and monitoring methods, solve in photovoltaic plant
Working condition when occurring abnormal, the problem of can not being positioned to the photovoltaic module array of failure, realize to each road
The real time monitoring of photovoltaic components in photovoltaic plant array working condition.
To achieve the above object, the present invention provides a kind of photovoltaic module array monitoring systems, including：Several sunlights
Radiant power test module, several front end control modules, direct current conflux case, gird-connected inverter, rear end control module and network control
Case and system controller processed；The input terminal of front end control module is separately connected photovoltaic module array and solar radiation power is surveyed
The output end of die trial block, front end control module is separately connected direct current conflux case and system controller, each solar radiation power
Test module connects several front end control modules, and the direct current conflux case, gird-connected inverter and rear end control module connect successively
It connects；The output end of the rear end control module is connected with cutting-in control case and system controller respectively；
Several described front end control modules, for obtaining the solar radiation power test module in current environment item
First voltage under part and the first electric current, according to first voltage and first the first power of Current calculation, then according to the first power
Calculate the maximum power theoretical value of photovoltaic module array；The front end control module is additionally operable to obtain the photovoltaic module array defeated
The second voltage gone out and the second electric current, and according to the second voltage and second the second power of Current calculation, by photovoltaic module battle array
Maximum power theoretical value, second voltage and the second power of row are sent to system control as the result of calculation of front end control module
Device；
The rear end control module, tertiary voltage and third electric current for obtaining the gird-connected inverter output, according to
The tertiary voltage and third Current calculation third power, and using the tertiary voltage and third power as rear end control module
Result of calculation be sent to system controller；
The system controller, the result of calculation for receiving the front end control module and rear end control module, and according to
Judge whether photovoltaic module array breaks down according to result of calculation.
Preferably, the solar wafer tool that the solar radiation power test module and the photovoltaic module array use
There are identical size, model, specification and power, and the angle installed and direction are identical.
Preferably, the front end control module, for obtaining the solar radiation power test module in current environment
Under the conditions of first voltage and the first electric current, according to first voltage and first the first power of Current calculation, specific formula for calculation is：
Pref=Vref*Iref*FF
Wherein, VrefIndicate first voltage of the solar radiation power test module under current environmental condition, Iref
Indicate first electric current of the solar radiation power test module under current environmental condition, PrefIndicate the sunlight spoke
First power of the power test module under current environmental condition is penetrated, FF indicates filling out for the solar radiation power test module
Fill the factor.
Preferably, the front end control module goes out the maximum power theory of photovoltaic assembly array according to the first power calculation
Value, specific formula for calculation are：
Wherein, PrefIndicate first power of the solar radiation power test module under current environmental condition, Nref
Indicate the chip concatenation number of the solar radiation power test module, NstringIndicate the monolithic photovoltaic group of photovoltaic module array
The chip of part concatenates number, NpcsIndicate that the photovoltaic module of photovoltaic module array concatenates number, MF indicates modifying factor, PmaxIndicate photovoltaic
The maximum power theoretical value of assembly array.
To achieve the above object, the present invention also provides a kind of photovoltaic module array monitoring method, include the following steps：
First voltage and first electric current of the solar radiation power test module under current environmental condition are obtained, according to the
One voltage and first the first power of Current calculation；
According to the maximum power theoretical value of the first power calculation photovoltaic module array of solar radiation power test module；
The second voltage and the second electric current of the output of photovoltaic module array are obtained, and according to the second voltage and the second electric current
Calculate the second power；
The tertiary voltage and third electric current of gird-connected inverter output are obtained, and according to the tertiary voltage and third galvanometer
Calculate third power；
According to the maximum power theoretical value of photovoltaic module array, second voltage, the second power and gird-connected inverter output
Tertiary voltage and third power, judge whether photovoltaic module array breaks down.
Preferably, the solar wafer tool that the solar radiation power test module and the photovoltaic module array use
There are identical size, model, specification and power, and the angle installed and direction are identical.
Preferably, the first voltage and first for obtaining solar radiation power test module under current environmental condition
Electric current, according to first voltage and first the first power of Current calculation, specific formula for calculation is：
Pref=Vref*Iref*FF
Wherein, VrefIndicate first voltage of the solar radiation power test module under current environmental condition, Iref
Indicate first electric current of the solar radiation power test module under current environmental condition, PrefIndicate the sunlight spoke
First power of the power test module under current environmental condition is penetrated, FF indicates filling out for the solar radiation power test module
Fill the factor.
Preferably, the maximum of the first power calculation photovoltaic module array according to solar radiation power test module
Power Theory value, specific formula for calculation are：
Wherein, PrefIndicate first power of the solar radiation power test module under current environmental condition, Nref
Indicate the chip concatenation number of the solar radiation power test module, NstringIndicate the monolithic photovoltaic group of photovoltaic module array
The chip of part concatenates number, NpcsIndicate that the photovoltaic module of photovoltaic module array concatenates number, MF indicates modifying factor, PmaxIndicate photovoltaic
The maximum power theoretical value of assembly array.
Preferably, the maximum power theoretical value according to photovoltaic module array, second voltage, the second power and grid-connected
The tertiary voltage and third power of inverter output, judge whether photovoltaic module array breaks down, specifically include following steps：
According to the maximum power theoretical value of the photovoltaic module array of acquisition, photovoltaic module array maximum power theoretical value is calculated
Threshold range；
When the second power of photovoltaic module array is located in the threshold range, and the second electricity of photovoltaic module array
When pressure is within the scope of the desired operating voltage of gird-connected inverter MPPT maximum power point tracking, the work of photovoltaic module array is being judged just
Often；Otherwise, judge that photovoltaic module array breaks down.
Preferably, when the second power of photovoltaic module array is located in the threshold range, and photovoltaic module array
Second voltage when being located within the scope of the desired operating voltage of gird-connected inverter MPPT maximum power point tracking, judge photovoltaic module array
It is working properly；Otherwise, judge that photovoltaic module array breaks down, specifically include following steps：
When the second power of photovoltaic module array is located in the threshold range, and the second electricity of photovoltaic module array
When pressure is within the scope of the desired operating voltage of gird-connected inverter MPPT maximum power point tracking, the work of photovoltaic module array is being judged just
Often；
When the second power of photovoltaic module array is less than the lower limit of the threshold range, and the of photovoltaic module array
When two voltages are located within the scope of the first deficient desired operating voltage of gird-connected inverter MPPT maximum power point tracking, photovoltaic module battle array is judged
The working performance of row is deteriorated；
When the second power of photovoltaic module array is less than the lower limit of the threshold range, and the of photovoltaic module array
When two voltages are less than the lower limit of the first deficient desired operating voltage range of gird-connected inverter MPPT maximum power point tracking, photovoltaic group is judged
The working performance of part array is seriously deteriorated or has a wafer damage；
When the second power of photovoltaic module array is less than the lower limit of the threshold range, and the of photovoltaic module array
When two voltages are more than the upper limit of the second deficient desired operating voltage range of gird-connected inverter MPPT maximum power point tracking, surveyed according to rear end
The tertiary voltage and third power that module obtains are controlled, judges that power grid breaks down or gird-connected inverter breaks down, even
Tertiary voltage is zero, judges that power grid breaks down；If tertiary voltage is not zero, and third power is less than or equal to photovoltaic module battle array
When the product of the second power and gird-connected inverter theoretical work efficiency that arrange, judge that gird-connected inverter breaks down.
Compared with prior art, the present invention haing the following advantages and high-lighting effect：
Photovoltaic module array monitoring system provided by the invention and monitoring method, if being matched by a pair main line photovoltaic module array
Installation solar radiation power test module is closed, test obtains the real output and solar radiation work(of photovoltaic module array
Photovoltaic is calculated according to the electrical power of solar radiation power test module in the electrical power of rate test module under the present circumstances
The maximum power theoretical value of assembly array, by by the real output of photovoltaic module array and maximum power theoretical value ratio
Compared with, the specific location of the photovoltaic module array to break down is not only judged according to comparison result, but also determine it is specific therefore
Hinder type, improves the efficiency of management of the photovoltaic plant administrative staff to photovoltaic plant, avoiding certain failures may cause entirely
Photovoltaic plant is stopped and brings larger economic loss.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is a kind of structural schematic diagram of photovoltaic module array monitoring system disclosed by the embodiments of the present invention；
Fig. 2 is a kind of flow chart of photovoltaic module array monitoring method disclosed by the embodiments of the present invention.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Embodiment one
As shown in Figure 1, present embodiment discloses a kind of photovoltaic module array monitoring systems, including：Several sunlight spokes
Penetrate power test module 101, several front end control modules 103, direct current conflux case 104, gird-connected inverter 105, rear end observing and controlling
Module 106, cutting-in control case 107 and system controller 108；The input terminal of each front end control module 103 connects light all the way
Assembly array 102 is lied prostrate, several front end control modules 103 connect a solar radiation power test module 101, and before being
The input terminal of end control module 103 is connect with solar radiation power test module, the output end of each front end control module 103
It is connected respectively with direct current conflux case 104 and system controller 108, direct current conflux case 104, gird-connected inverter 105 and rear end are surveyed
Control module 106 is sequentially connected, the output end of rear end control module 106 respectively with cutting-in control case 107 and system controller 108
Connection.In the present embodiment, each front end control module 103 connects a solar radiation power test module 101.
Wherein, solar radiation power test module 101 is mainly used to test benchmark power, is concatenated by chip.And
And the solar wafer that solar radiation power test module 101 is used with photovoltaic module array 102 is of the same size, type
Number, specification and power, and the angle installed and direction are identical.Solar radiation power test module 101 passes through positive and negative two
Line is connect with head end test module 103.If the cooperation one solar radiation power test mould of installation of main line photovoltaic module array 102
In the present embodiment, one solar radiation power test module 101 of installation is coordinated per road photovoltaic module array 102 for block 101.
Front end control module 103 is for obtaining solar radiation power test module under current light and environmental condition
First voltage and the first electric current go out photovoltaic according to first voltage and first the first power of Current calculation according to the first power calculation
The maximum power theoretical value of assembly array, and first voltage, the first electric current, the first power and maximum power theoretical value are sent
To system controller 108.First voltage is the open-circuit voltage of solar radiation power test module, and the first electric current is the sun
The short circuit current of optical radiation power test module, the calculation formula by first voltage and first the first power of Current calculation are：
Pref=Vref*Iref*FF
Wherein, VrefIndicate first voltage of the solar radiation power test module 101 under current environmental condition, IrefTable
Show first electric current of the solar radiation power test module 101 under current environmental condition, PrefIndicate that solar radiation power is surveyed
First power of the die trial block 101 under current environmental condition, FF indicate the filling of solar radiation power test module 101 because
Son.
Front end control module 103 goes out photovoltaic assembly array according to the first power calculation of solar radiation power test module
The calculation formula of maximum power theoretical value be：
Wherein, PrefIndicate first power of the solar radiation power test module 101 under current environmental condition, NrefTable
Show the chip concatenation number of solar radiation power test module 101, NstringIndicate the monolithic photovoltaic group of photovoltaic module array 102
The chip of part concatenates number, NpcsIndicate that the photovoltaic module of photovoltaic module array 102 concatenates number, MF indicates modifying factor, PmaxIt indicates
The maximum power theoretical value of photovoltaic module array.
For example, the monolithic photovoltaic module of photovoltaic module array 102 is concatenated using 40 pieces of chips, photovoltaic module array 102 is
30 pieces of photovoltaic modulies concatenate, then just having 1200 pieces of chips on photovoltaic module array；Solar radiation power test mould
Block 101 is concatenated using 4 pieces of chips, and measures first work(of the solar radiation power test module 101 under current environmental condition
Rate is 10W, then the operating power of every piece of chip under the present circumstances is exactly 2.5W；Modifying factor is 0.8, then Pmax=
2.5*1200*0.8 i.e. PmaxThe maximum power theoretical value of=2400W namely photovoltaic module array is 2400W.
Front end control module 103 is additionally operable to obtain the second voltage and the second electric current of 102 output of photovoltaic module array, according to
Second voltage and second the second power of Current calculation, specific formula for calculation are：
Preal=Vreal*Ireal
Wherein, VrealIndicate the second voltage for the photovoltaic module array 102 that front end control module 103 obtains, IrealBefore expression
Hold the second electric current of the photovoltaic module array 102 of the acquisition of control module 103, PrealIndicate the photovoltaic module array being calculated
102 the second power.
Direct current conflux case 104 is used to collect the second electric current of the output of front end control module 103, and exports to gird-connected inverter
105, then gird-connected inverter 105 direct current of input is converted into alternating current, rear end control module 106 obtains gird-connected inverter
105 output tertiary voltages and third electric current, according to tertiary voltage and third Current calculation third power, and by tertiary voltage,
Third electric current and third power are sent to system controller 108.Front end control module 103 and rear end control module 106 are logical
It crosses RS485 buses and system controller 108 connects.108 receiving front-end control module 103 of system controller and rear end control module
106 result of calculation, and the photovoltaic module array of failure is positioned according to result of calculation.Cutting-in control case 107 with
Rear end control module 106 connects, and the alternating current progress for being exported to rear end control module 106 is grid-connected, is output in power grid.Before
The result of calculation of end control module 103 includes 102 corresponding second voltage of photovoltaic module array, the second power and maximum power reason
By value；The result of calculation of rear end control module 106 includes the tertiary voltage that gird-connected inverter 105 exports in real time and third power.
Wherein, it is according to the calculation formula of tertiary voltage and third Current calculation third power：
Pr3=Vr3*Ir3
Pr3Indicate the third power that gird-connected inverter 105 exports in real time, Vr3Indicate what gird-connected inverter 105 exported in real time
Tertiary voltage, Ir3Indicate the third electric current that gird-connected inverter 105 exports in real time.System controller 108 is according to front end control module
103 and rear end control module 106 result of calculation specific steps that the photovoltaic module array 102 of failure is positioned
For：
System controller 108 calculates photovoltaic module battle array according to the maximum power theoretical value of the photovoltaic module array of acquisition
The threshold range of 102 maximum power theoretical value of row；
When the second power of photovoltaic module array is located in the threshold range, and the second electricity of photovoltaic module array
When pressure is within the scope of the desired operating voltage of gird-connected inverter MPPT maximum power point tracking, the work of photovoltaic module array is being judged just
Often；Otherwise, judge that photovoltaic module array breaks down.
In the case where photovoltaic module array breaks down, system controller 108 can be according to front end control module 103 with after
The result of calculation of control module 106 is held further to judge the fault type of photovoltaic module array 102, the specific steps are：
When the second power of photovoltaic module array is less than the lower limit of the threshold range, and the of photovoltaic module array
When two voltages are located within the scope of the first deficient desired operating voltage of gird-connected inverter MPPT maximum power point tracking, photovoltaic module battle array is judged
The working performance of row is deteriorated；
When the second power of photovoltaic module array is less than the lower limit of the threshold range, and the of photovoltaic module array
When two voltages are less than the lower limit of the first deficient desired operating voltage range of gird-connected inverter MPPT maximum power point tracking, photovoltaic group is judged
The working performance of part array is seriously deteriorated or has a wafer damage；
When the second power of photovoltaic module array is less than the lower limit of the threshold range, and the of photovoltaic module array
When two voltages are more than the upper limit of the second deficient desired operating voltage range of gird-connected inverter MPPT maximum power point tracking, surveyed according to rear end
The tertiary voltage and third power that module obtains are controlled, judges that power grid breaks down or gird-connected inverter breaks down, even
Tertiary voltage is zero, judges that power grid breaks down；If tertiary voltage is not zero, and third power is less than or equal to photovoltaic module battle array
When the product of the second power and gird-connected inverter theoretical work efficiency that arrange, judge that gird-connected inverter breaks down.
For example, the permission operating voltage range of gird-connected inverter is 100V to 550V, then gird-connected inverter maximum power
The desired operating voltage ranging from 300V to 500V of point tracking, the first deficient ideal operation of gird-connected inverter MPPT maximum power point tracking
Voltage range is 100V to 300V, and the second deficient desired operating voltage ranging from 500V of gird-connected inverter MPPT maximum power point tracking is extremely
550V；The upper threshold limit of 102 maximum power theoretical value of photovoltaic module array is expressed as t, and lower limit is expressed as s, wherein t=
Pmax+Pmax* 10%, s=Pmax-Pmax* 10%；So work as PmaxWhen=2400W, 102 maximum power theoretical value of photovoltaic module array
Threshold range be exactly (2160,2640).
Second power of photovoltaic module array output is P1, the theoretical work efficiency of gird-connected inverter is 40%, if photovoltaic
Second power of assembly array and the result of product of gird-connected inverter theoretical work efficiency are expressed as P2, then P2=P1* 40%；That
, system controller 108 is according to the result of calculation of front end control module 103 and rear end control module 106 to photovoltaic module array
The detailed process that is judged of operating status be exactly：
When the second power P of photovoltaic module array1When between 2160W and 2640W, and the of photovoltaic module array
When two voltages are between 300V and 500V, judge that photovoltaic module array is working properly；
When the second power P of photovoltaic module array1When less than 2160W, and the second voltage of photovoltaic module array is located at
When between 100V and 300V, judge that the working performance of photovoltaic module array is deteriorated；
When the second power P of photovoltaic module array1When less than 2160W, and the second voltage of photovoltaic module array is less than
When 100V, judge that the working performance of photovoltaic module array is seriously deteriorated or has a wafer damage；
When the second power P of photovoltaic module array1When less than 2160W, and the second voltage of photovoltaic module array is more than
When 550V, the tertiary voltage and third power obtained according to rear end control module judges power grid failure or grid-connected inverse
Become device to break down, even tertiary voltage is zero, judges that power grid breaks down；If tertiary voltage is not zero, and third power is small
In or equal to P2When, judge that gird-connected inverter breaks down.
Result after system controller 108 judges data analysis is sent to background server by router, and backstage takes
Business device is then forwarded to user terminal browser and shows, facilitates the real time execution of all photovoltaic module arrays in user monitoring photovoltaic plant
State, when the working condition of certain road photovoltaic module array occurs abnormal, the photovoltaic module array of browser display failure
Specific location, and the specific fault type that display system controller judges.
In the present embodiment, front end control module, rear end control module and system controller are STM32F103 processing
Device.
Embodiment two
As shown in Fig. 2, present embodiment discloses a kind of photovoltaic module array monitoring method, include the following steps：
S201 obtains first voltage and first electric current of the solar radiation power test module under current environmental condition,
According to first voltage and first the first power of Current calculation；First voltage is the open circuit electricity of solar radiation power test module
Pressure, the first electric current is the short circuit current of solar radiation power test module, passes through first voltage and the first Current calculation the
The calculation formula of one power is：
Pref=Vref*Iref*FF
Wherein, VrefIndicate first voltage of the solar radiation power test module under current environmental condition, IrefIt indicates
First electric current of the solar radiation power test module under current environmental condition, PrefIndicate solar radiation power test mould
First power of the block under current environmental condition, FF indicate the fill factor of solar radiation power test module.
S202 is managed according to the maximum power of the first power calculation photovoltaic module array of solar radiation power test module
By value；Due to the solar wafer that solar radiation power test module and photovoltaic module array use is of the same size,
Model, specification and power, and the angle installed and direction are identical, so can be according to solar radiation power test module
The maximum power theoretical value of first power calculation photovoltaic module array.Specifically calculation formula is：
Wherein, PrefIndicate first power of the solar radiation power test module under current environmental condition, NrefIt indicates
The chip of solar radiation power test module concatenates number, NstringIndicate the chip of the monolithic photovoltaic module of photovoltaic module array
Concatenate number, NpcsIndicate that the photovoltaic module of photovoltaic module array concatenates number, MF indicates modifying factor, PmaxIndicate photovoltaic module array
Maximum power theoretical value.
For example, the monolithic photovoltaic module of photovoltaic module array is concatenated using 40 pieces of chips, photovoltaic module array is 30 blocks of light
Volt component concatenates, then just having 1200 pieces of chips on photovoltaic module array；Solar radiation power test module uses 4
Block chip concatenates, and it is 10W to measure first power of the solar radiation power test module under current environmental condition, then often
The operating power of block chip under the present circumstances is exactly 2.5W；Modifying factor is 0.8, then Pmax=2.5*1200*0.8, i.e.,
PmaxThe maximum power theoretical value of=2400W namely photovoltaic module array is 2400W.
S203 obtains the second voltage and the second electric current of the output of photovoltaic module array, and according to second voltage and the second electricity
The second power of stream calculation, specific formula for calculation are：
Preal=Vreal*Ireal
Wherein, VrealIndicate the second voltage of photovoltaic module array, IrealIndicate the second electric current of photovoltaic module array,
PrealIndicate the second power of the photovoltaic module array being calculated.
S204 obtains the tertiary voltage and third electric current of gird-connected inverter output, and according to tertiary voltage and third electric current
Third power is calculated, specific calculation formula is：
Pr3=Vr3*Ir3
Pr3Indicate the third power that gird-connected inverter exports in real time, Vr3Indicate the third electricity that gird-connected inverter exports in real time
Pressure, Ir3Indicate the third electric current that gird-connected inverter exports in real time.
S205, maximum power theoretical value, second voltage, the second power and gird-connected inverter according to photovoltaic module array
The tertiary voltage and third power of output, judge whether photovoltaic module array breaks down, the specific steps are：
According to the maximum power theoretical value of the photovoltaic module array of acquisition, it is theoretical to calculate photovoltaic module array maximum power
The threshold range of value；
When the second power of photovoltaic module array is located in above-mentioned threshold range, and the second electricity of photovoltaic module array
When pressure is within the scope of the desired operating voltage of gird-connected inverter MPPT maximum power point tracking, the work of photovoltaic module array is being judged just
Often；Otherwise, judge that photovoltaic module array breaks down.
In the case where photovoltaic module array breaks down, second voltage that can be according to photovoltaic module array, the second power
And the tertiary voltage and third power of gird-connected inverter output, the fault type of photovoltaic module array is further sentenced
It is disconnected, the specific steps are：
When the second power of photovoltaic module array is less than the lower limit of above-mentioned threshold range, and the of photovoltaic module array
When two voltages are located within the scope of the first deficient desired operating voltage of gird-connected inverter MPPT maximum power point tracking, photovoltaic module battle array is judged
The working performance of row is deteriorated；
When the second power of photovoltaic module array is less than the lower limit of above-mentioned threshold range, and the of photovoltaic module array
When two voltages are less than the lower limit of the first deficient desired operating voltage range of gird-connected inverter MPPT maximum power point tracking, photovoltaic group is judged
The working performance of part array is seriously deteriorated or has a wafer damage；
When the second power of photovoltaic module array is less than the lower limit of above-mentioned threshold range, and the of photovoltaic module array
When two voltages are more than the upper limit of the second deficient desired operating voltage range of gird-connected inverter MPPT maximum power point tracking, according to grid-connected inverse
The tertiary voltage and third power for becoming device output judge that power grid breaks down or gird-connected inverter breaks down, even the
Three voltages are zero, judge that power grid breaks down；If tertiary voltage is not zero, and third power is less than or equal to photovoltaic module array
The second power and gird-connected inverter theoretical work efficiency product when, judge gird-connected inverter break down.
For example, the permission operating voltage range of gird-connected inverter is 100V to 550V, then gird-connected inverter maximum power
The desired operating voltage ranging from 300V to 500V of point tracking, the first deficient ideal operation of gird-connected inverter MPPT maximum power point tracking
Voltage range is 100V to 300V, and the second deficient desired operating voltage ranging from 500V of gird-connected inverter MPPT maximum power point tracking is extremely
550V；The upper threshold limit of photovoltaic module array maximum power theoretical value is expressed as t, and lower limit is expressed as s, wherein t=Pmax+
Pmax* 10%, s=Pmax-Pmax* 10%；So work as PmaxWhen=2400W, the threshold value of photovoltaic module array maximum power theoretical value
Range is exactly (2160,2640).
Second power of photovoltaic module array output is P1, the theoretical work efficiency of gird-connected inverter is 40%, if photovoltaic
Second power of assembly array and the result of product of gird-connected inverter theoretical work efficiency are expressed as P2, then P2=P1* 40%；That
, according to the maximum power theoretical value of photovoltaic module array, second voltage, the second power and the third of gird-connected inverter output
Voltage and third power, the detailed process judged the operating status of photovoltaic module array are exactly：
When the second power P of photovoltaic module array1When between 2160W and 2640W, and the of photovoltaic module array
When two voltages are between 300V and 500V, judge that photovoltaic module array is working properly；
When the second power P of photovoltaic module array1When less than 2160W, and the second voltage of photovoltaic module array is located at
When between 100V and 300V, judge that the working performance of photovoltaic module array is deteriorated；
When the second power P of photovoltaic module array1When less than 2160W, and the second voltage of photovoltaic module array is less than
When 100V, judge that the working performance of photovoltaic module array is seriously deteriorated or has a wafer damage；
When the second power P of photovoltaic module array1When less than 2160W, and the second voltage of photovoltaic module array is more than
When 550V, according to the tertiary voltage and third power of gird-connected inverter output, power grid failure or parallel network reverse are judged
Device breaks down, and even tertiary voltage is zero, judges that power grid breaks down；If tertiary voltage is not zero, and third power is less than
Or when equal to P, judge that gird-connected inverter breaks down.
In the present embodiment, front end control module, rear end control module and system controller are STM32F103 processing
Device.
Photovoltaic module array monitoring system disclosed by the embodiments of the present invention and monitoring method, realize to photovoltaic module array
Real-time running data detection and analysis, found in time convenient for user the photovoltaic module array to break down and it is specific therefore
Hinder type, avoiding part photovoltaic module array failure causes entire photovoltaic system to be stopped, and ensure that photovoltaic plant
Stable operation.
Particular embodiments described above has carried out further in detail the purpose of the present invention, technical solution and advantageous effect
It describes in detail bright, it should be understood that the above is only a specific embodiment of the present invention, is not intended to restrict the invention, it is all
Within the principle of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in protection scope of the present invention
Within.
Claims (10)
1. a kind of photovoltaic module array monitoring system, which is characterized in that including：Several solar radiation power test modules,
Several front end control modules, direct current conflux case, gird-connected inverter, rear end control module, cutting-in control case and system control
Device；The input terminal of front end control module is separately connected photovoltaic module array and solar radiation power test module, front end observing and controlling
The output end of module is separately connected direct current conflux case and system controller, and each solar radiation power test module connection is several
A front end control module, the direct current conflux case, gird-connected inverter and rear end control module are sequentially connected；The rear end observing and controlling mould
The output end of block is connected with cutting-in control case and system controller respectively；
Several described front end control modules, for obtaining the solar radiation power test module under current environmental condition
First voltage and the first electric current, according to first voltage and first the first power of Current calculation, then according to the first power calculation
The maximum power theoretical value of photovoltaic module array；The front end control module is additionally operable to obtain the photovoltaic module array output
Second voltage and the second electric current, and according to the second voltage and second the second power of Current calculation, by photovoltaic module array
Maximum power theoretical value, second voltage and the second power are sent to system controller as the result of calculation of front end control module；
The rear end control module, tertiary voltage and third electric current for obtaining the gird-connected inverter output, according to described
Tertiary voltage and third Current calculation third power, and using the tertiary voltage and third power as the meter of rear end control module
It calculates result and is sent to system controller；
The system controller, the result of calculation for receiving the front end control module and rear end control module, and according to meter
It calculates result and judges whether photovoltaic module array breaks down.
2. a kind of photovoltaic module array monitoring system as described in claim 1, which is characterized in that the solar radiation power
The solar wafer that test module and the photovoltaic module array use is of the same size, model, specification and power, and
And the angle installed and direction are identical.
3. a kind of photovoltaic module array monitoring system as described in claim 1, which is characterized in that the front end control module,
For obtaining first voltage and first electric current of the solar radiation power test module under current environmental condition, according to
One voltage and first the first power of Current calculation, specific formula for calculation are：
Pref=Vref*Iref*FF
Wherein, VrefIndicate first voltage of the solar radiation power test module under current environmental condition, IrefIt indicates
First electric current of the solar radiation power test module under current environmental condition, PrefIndicate the solar radiation work(
First power of the rate test module under current environmental condition, FF indicate the filling of the solar radiation power test module because
Son.
4. a kind of photovoltaic module array monitoring system as described in claim 1, which is characterized in that the front end control module root
Go out the maximum power theoretical value of photovoltaic assembly array according to the first power calculation, specific formula for calculation is：
Wherein, PrefIndicate first power of the solar radiation power test module under current environmental condition, NrefIt indicates
The chip of the solar radiation power test module concatenates number, NstringIndicate the monolithic photovoltaic module of photovoltaic module array
Chip concatenates number, NpcsIndicate that the photovoltaic module of photovoltaic module array concatenates number, MF indicates modifying factor, PmaxIndicate photovoltaic module
The maximum power theoretical value of array.
5. a kind of photovoltaic module array monitoring method, which is characterized in that include the following steps：
First voltage and first electric current of the solar radiation power test module under current environmental condition are obtained, according to the first electricity
Pressure and first the first power of Current calculation；
According to the maximum power theoretical value of the first power calculation photovoltaic module array of solar radiation power test module；
The second voltage and the second electric current of the output of photovoltaic module array are obtained, and according to the second voltage and the second Current calculation
Second power；
Obtain the tertiary voltage and third electric current of gird-connected inverter output, and according to the tertiary voltage and third Current calculation the
Three power；
The according to the maximum power theoretical value of photovoltaic module array, second voltage, the second power and gird-connected inverter output
Three voltages and third power, judge whether photovoltaic module array breaks down.
6. a kind of photovoltaic module array monitoring method as claimed in claim 5, which is characterized in that the solar radiation power
The solar wafer that test module and the photovoltaic module array use is of the same size, model, specification and power, and
And the angle installed and direction are identical.
7. a kind of photovoltaic module array monitoring method as claimed in claim 5, which is characterized in that the acquisition solar radiation
First voltage and first electric current of the power test module under current environmental condition, according to first voltage and the first Current calculation
One power, specific formula for calculation are：
Pref=Vref*Iref*FF
Wherein, VrefIndicate first voltage of the solar radiation power test module under current environmental condition, IrefIt indicates
First electric current of the solar radiation power test module under current environmental condition, PrefIndicate the solar radiation work(
First power of the rate test module under current environmental condition, FF indicate the filling of the solar radiation power test module because
Son.
8. a kind of photovoltaic module array monitoring method as claimed in claim 5, which is characterized in that described according to solar radiation
The maximum power theoretical value of first power calculation photovoltaic module array of power test module, specific formula for calculation are：
Wherein, PrefIndicate first power of the solar radiation power test module under current environmental condition, NrefIt indicates
The chip of the solar radiation power test module concatenates number, NstringIndicate the monolithic photovoltaic module of photovoltaic module array
Chip concatenates number, NpcsIndicate that the photovoltaic module of photovoltaic module array concatenates number, MF indicates modifying factor, PmaxIndicate photovoltaic module
The maximum power theoretical value of array.
9. a kind of photovoltaic module array monitoring method as claimed in claim 5, which is characterized in that described according to photovoltaic module battle array
The tertiary voltage and third power that maximum power theoretical value, second voltage, the second power and the gird-connected inverter of row export, sentence
Whether disconnected photovoltaic module array breaks down, and specifically includes following steps：
According to the maximum power theoretical value of the photovoltaic module array of acquisition, the threshold of photovoltaic module array maximum power theoretical value is calculated
It is worth range；
When the second power of photovoltaic module array is located in the threshold range, and the second voltage position of photovoltaic module array
When within the scope of the desired operating voltage of gird-connected inverter MPPT maximum power point tracking, judge that photovoltaic module array is working properly；It is no
Then, judge that photovoltaic module array breaks down.
10. a kind of photovoltaic module array monitoring method as claimed in claim 9, which is characterized in that when photovoltaic module array
When second power is located in the threshold range, and the second voltage of photovoltaic module array is located at gird-connected inverter maximum power
When within the scope of the desired operating voltage of point tracking, judge that photovoltaic module array is working properly；Otherwise, judge that photovoltaic module array goes out
Existing failure, specifically includes following steps：
When the second power of photovoltaic module array is located in the threshold range, and the second voltage position of photovoltaic module array
When within the scope of the desired operating voltage of gird-connected inverter MPPT maximum power point tracking, judge that photovoltaic module array is working properly；
When the second power of photovoltaic module array is less than the lower limit of the threshold range, and the second electricity of photovoltaic module array
When pressure is within the scope of the first deficient desired operating voltage of gird-connected inverter MPPT maximum power point tracking, photovoltaic module array is judged
Working performance is deteriorated；
When the second power of photovoltaic module array is less than the lower limit of the threshold range, and the second electricity of photovoltaic module array
When pressure is less than the lower limit of the first deficient desired operating voltage range of gird-connected inverter MPPT maximum power point tracking, photovoltaic module battle array is judged
The working performance of row is seriously deteriorated or has a wafer damage；
When the second power of photovoltaic module array is less than the lower limit of the threshold range, and the second electricity of photovoltaic module array
When pressure is more than the upper limit of the second deficient desired operating voltage range of gird-connected inverter MPPT maximum power point tracking, according to rear end observing and controlling mould
The tertiary voltage and third power that block obtains judge that power grid breaks down or gird-connected inverter breaks down, even third
Voltage is zero, judges that power grid breaks down；If tertiary voltage is not zero, and third power is less than or equal to photovoltaic module array
When the product of the second power and gird-connected inverter theoretical work efficiency, judge that gird-connected inverter breaks down.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109286368A (en) * | 2018-11-13 | 2019-01-29 | 福州大学 | The online health monitoring systems of photovoltaic array and its implementation based on B/S framework |
| CN113419566A (en) * | 2021-07-02 | 2021-09-21 | 阳光电源股份有限公司 | Method and system for adjusting tracking angle of photovoltaic module |
| CN116317944A (en) * | 2023-03-21 | 2023-06-23 | 国网浙江省电力有限公司电力科学研究院 | Photovoltaic inverter MPPT efficiency on-site testing device and testing method |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090002295A (en) * | 2007-06-26 | 2009-01-09 | 대한전선 주식회사 | A unified management and follow up control system and method in solar photovoltatic power generation facility |
| CN102158129A (en) * | 2011-01-30 | 2011-08-17 | 浙江昱能光伏科技集成有限公司 | Solar photovoltaic system and fault detection method thereof |
| CN102288856A (en) * | 2011-05-16 | 2011-12-21 | 复旦大学 | Photovoltaic polar plate fault damage detection device based on wireless communication and method of same |
| CN102638197A (en) * | 2012-04-20 | 2012-08-15 | 浙江昱能光伏科技集成有限公司 | Solar photovoltaic component, method for tracking maximum power point thereof and method for monitoring fault thereof |
| JP2015114741A (en) * | 2013-12-09 | 2015-06-22 | オムロン株式会社 | Solar battery evaluation apparatus, solar battery evaluation method, and photovoltaic power generation system |
| CN104767482A (en) * | 2014-01-02 | 2015-07-08 | 上海岩芯电子科技有限公司 | Method for diagnosing aging and short circuit of photovoltaic module online |
| CN104796082A (en) * | 2015-04-22 | 2015-07-22 | 中国科学院广州能源研究所 | System and method for diagnosing faults of photovoltaic power generation systems in online manner |
| KR101642680B1 (en) * | 2015-11-10 | 2016-07-26 | (주)대은 | Monitoring system of photovoltaic generation |
| CN205792451U (en) * | 2016-05-30 | 2016-12-07 | 佛山科学技术学院 | A kind of failure detector of photovoltaic parallel in system |
| JP2017103892A (en) * | 2015-12-01 | 2017-06-08 | 株式会社Ｃｏ２Ｏ | Evaluation device, evaluation method and evaluation program for solar cell module |
| US20170294877A1 (en) * | 2016-04-08 | 2017-10-12 | Ablerex Electronics Co., Ltd. | Power Generation Abnormality Detection Method and System Thereof for Photovoltaic Panels |
| CN208723856U (en) * | 2018-06-22 | 2019-04-09 | 浙江源控节能科技有限公司 | A kind of photovoltaic module array monitoring system |
-
2018
- 2018-06-22 CN CN201810653129.0A patent/CN108551330B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090002295A (en) * | 2007-06-26 | 2009-01-09 | 대한전선 주식회사 | A unified management and follow up control system and method in solar photovoltatic power generation facility |
| CN102158129A (en) * | 2011-01-30 | 2011-08-17 | 浙江昱能光伏科技集成有限公司 | Solar photovoltaic system and fault detection method thereof |
| CN102288856A (en) * | 2011-05-16 | 2011-12-21 | 复旦大学 | Photovoltaic polar plate fault damage detection device based on wireless communication and method of same |
| CN102638197A (en) * | 2012-04-20 | 2012-08-15 | 浙江昱能光伏科技集成有限公司 | Solar photovoltaic component, method for tracking maximum power point thereof and method for monitoring fault thereof |
| JP2015114741A (en) * | 2013-12-09 | 2015-06-22 | オムロン株式会社 | Solar battery evaluation apparatus, solar battery evaluation method, and photovoltaic power generation system |
| CN104767482A (en) * | 2014-01-02 | 2015-07-08 | 上海岩芯电子科技有限公司 | Method for diagnosing aging and short circuit of photovoltaic module online |
| CN104796082A (en) * | 2015-04-22 | 2015-07-22 | 中国科学院广州能源研究所 | System and method for diagnosing faults of photovoltaic power generation systems in online manner |
| KR101642680B1 (en) * | 2015-11-10 | 2016-07-26 | (주)대은 | Monitoring system of photovoltaic generation |
| JP2017103892A (en) * | 2015-12-01 | 2017-06-08 | 株式会社Ｃｏ２Ｏ | Evaluation device, evaluation method and evaluation program for solar cell module |
| US20170294877A1 (en) * | 2016-04-08 | 2017-10-12 | Ablerex Electronics Co., Ltd. | Power Generation Abnormality Detection Method and System Thereof for Photovoltaic Panels |
| CN205792451U (en) * | 2016-05-30 | 2016-12-07 | 佛山科学技术学院 | A kind of failure detector of photovoltaic parallel in system |
| CN208723856U (en) * | 2018-06-22 | 2019-04-09 | 浙江源控节能科技有限公司 | A kind of photovoltaic module array monitoring system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109286368A (en) * | 2018-11-13 | 2019-01-29 | 福州大学 | The online health monitoring systems of photovoltaic array and its implementation based on B/S framework |
| CN113419566A (en) * | 2021-07-02 | 2021-09-21 | 阳光电源股份有限公司 | Method and system for adjusting tracking angle of photovoltaic module |
| CN116317944A (en) * | 2023-03-21 | 2023-06-23 | 国网浙江省电力有限公司电力科学研究院 | Photovoltaic inverter MPPT efficiency on-site testing device and testing method |
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|---|---|
| CN108551330B (en) | 2024-06-04 |
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