CN103529302B - The performance test circuit and method of testing of a kind of photovoltaic module - Google Patents
The performance test circuit and method of testing of a kind of photovoltaic module Download PDFInfo
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- CN103529302B CN103529302B CN201310439670.9A CN201310439670A CN103529302B CN 103529302 B CN103529302 B CN 103529302B CN 201310439670 A CN201310439670 A CN 201310439670A CN 103529302 B CN103529302 B CN 103529302B
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Abstract
The invention discloses a kind of performance test circuit of photovoltaic module and method of testing, the circuit includes being used for two connection ends being connected with photovoltaic module both positive and negative polarity, a resistance bridge is serially connected between two connection ends, the resistance bridge includes adjustable resistance R, for accessing two terminals and two regulation resistance R1 of equivalent insulaion resistance, R2, adjustable resistance R and the first regulation resistance R1 the first series arms formed and two terminals for accessing equivalent insulaion resistance are in parallel with the second series arm that the second regulation resistance R2 is formed, an ammeter is connected between the series connection point of two series arm.The performance test circuit and method of testing of the photovoltaic module of the present invention lie prostrate the insulaion resistance of component using a resistance bridge circuit precise measuring, it is simple in construction, the series resistance and insulaion resistance easy to implement that photovoltaic module can fast and accurately be measured at the scene, the quality and insulating properties of photovoltaic module are evaluated, realize the parameter testing under actual illumination.
Description
Technical field
The invention belongs to industrial measurement and control technical field, and in particular to a kind of test circuit of quick detection photovoltaic module performance
And method of testing.
Background technology
With increasingly sharpening for energy crisis and environmental problem, the application of solar photo-voltaic power generation station is increasingly extensive.At present,
Heliotechnics is applied in all trades and professions more and more widely, but when using solar energy, it is necessary to photovoltaic group
The performance (mainly insulaion resistance) of part is tested, because when in system insulation failure, it is easy to security incident occurs,
So as to cause the harm of the person, property.
According to international standard IEC61646《Ground membrane photovoltaic component --- design identification and sizing》In on " measure
Whether the insulation between current carrying part and module frame or outside in photovoltaic module good " 10.3 Insulation Test in
10.3.4 program require it is as follows：Component lead-out wire short circuit is followed by the positive pole of the D.C. isolation tester of Flow restrictions,
The metal part that component exposes is connected to the negative pole of insulation tester, if component is Rimless, or frame is non-conductor, will
The periphery and the back side of component are wrapped up with conductive foil, if component does not contain glass outer layer, will be wrapped up before component with conductive foil, then
Conductive foil is connected to the negative pole of insulation tester.But in practical operation, for Rimless component, (such as internal and external layers of glass encapsulates
Photovoltaic module) and component (such as flexible thin-film battery component) Insulation Test without glass outer by component edge with leading
Electric paper tinsel pastes parcel, and this method operating difficulties, the conductive foil pasted can not reuse.
The principle of present solar power generation and the detection of its performance parameter turn into the ABC that tradesman must grasp,
But at present using it is more be large-scale detecting instrument, equipment volume and weight are huge, and installation and transportation are inconvenient, and price is held high
It is expensive, it is impossible to the quality of photovoltaic module is used for quickly detecting at the scene.
Chinese Patent Application No. 201210367758.X discloses a kind of fast photovoltaic module power quality detector, external
One resistance value can accurately adjust and can pin-point reading external series resistance；And external series resistance is adjusted to ensure
The establishment of linear equation.The detector is although simple in construction, but the circuit can only realize to photovoltaic module series resistance and
The measurement of power, it is impossible to detected to its insulaion resistance.
Chinese Patent Application No. 201210302192.2 disclose a kind of solar photovoltaic assembly insulated test device and
Method, the device include cavity body structure conductive in an external insulation, and electro-insulating rubber is packed pumping valve element and electrode contact；Survey
The inner surface that trial assembly is put is coated with conductive metal film, or is pasted with conductive rubber, realizes internally conductive.In detection, photovoltaic module
It is put into dielectric chamber, after being sealed to dielectric chamber, is vacuumized, the conductive layer cladding photovoltaic group of dielectric chamber inner surface
Part, insulating resistance value is detected by resistance meter.The structure of the device is more complicated, also dielectric chamber is taken out when in use very
Sky, therefore, it is also desirable to optional equipment vaccum-pumping equipment, use is more troublesome, is not suitable for quick detection；In addition, the device
The series resistance of photovoltaic module can not be detected.
The content of the invention
It is an object of the invention to provide a kind of performance test circuit of photovoltaic module, and fiber crops are used to solve existing test equipment
It is tired can not quick detection the problem of, while provide a kind of method of testing using the test circuit.
In order to realize the above object the technical scheme that the performance test circuit of institute's photovoltaic module of the present invention uses is：Including
For two connection ends being connected with photovoltaic module both positive and negative polarity, a resistance bridge, the electricity are serially connected between two connection end
Resistance bridge includes adjustable resistance R, two terminals for accessing equivalent insulaion resistance and two regulation resistances R1, R2, adjustable electric
Hinder the first series arm of R and the first regulation resistance R1 compositions and two terminals and second for accessing equivalent insulaion resistance
Second series arm of regulation resistance R2 compositions is in parallel, and an ammeter is connected between the series connection point of two series arm.
One end of described two connection ends is used to connect photovoltaic module shell, and the other end is used to be connected to ground.
String is provided with first switch K1, the second regulation between the series connection point of first series arm and the first regulation resistance R1
Second switch K2 is parallel with resistance R2, is gone here and there between the adjustable resistance R connection ends being connected and the series connection point of the second series arm
Provided with the 3rd switch K3, a voltmeter is also parallel with two series arms.
First regulation resistance is identical with the resistance of the second regulation resistance.
The technical scheme that the performance test methods of institute's photovoltaic module of the present invention use is：This method comprises the following steps：
(1) treat and survey photovoltaic module progress illumination simulation, and intensity of illumination is reached setting value；
(2) first regulation resistance R1 and the second regulation resistance R2 are fixed given value, adjust adjustable resistance R, work as ammeter
Shown current value be 0 when, obtain insulaion resistance R3=R2*R/R1.
Treat to survey photovoltaic module and carry out illumination simulation and use after xenon light irradiation concave mirror again reflected in parallel to photovoltaic to be measured
The mode of component.
The first regulation resistance R1 and the second regulation resistance R2 are identical.The performance test circuit of the photovoltaic module of the present invention
And method of testing using a resistance bridge circuit precise measuring volt component insulaion resistance, it is simple in construction, it is easy to implement can be fast
The fast series resistance and insulaion resistance for accurately measuring photovoltaic module at the scene, quality and insulating properties to photovoltaic module are carried out
Evaluation, realizes the parameter testing under actual illumination.
The corresponding switch of increase and voltmeter in circuit, can be to the series resistance and short circuit current of photovoltaic module, disconnected
Road voltage, fill factor, curve factor and shunt resistance measure, and fully understand the performance of photovoltaic module, realize scene to photovoltaic module
Detection.
Brief description of the drawings
Fig. 1 is simulated solar irradiation schematic diagram；
Fig. 2 is the equivalent circuit diagram of the performance test circuit first embodiment of photovoltaic module；
Fig. 3 is the equivalent circuit diagram of the performance test circuit second embodiment of photovoltaic module；
Fig. 4 is photovoltaic moduleWithRelation schematic diagram；
Fig. 5 is the I-V curve figure of photovoltaic module.
Embodiment
Below in conjunction with the accompanying drawings and the present invention is described further specific embodiment.
The schematic diagram of illumination is carried out for simulated solar irradiation of the present invention as shown in Figure 1, after irradiating concave mirror 2 using xenon lamp 1,
The reflected light of formation again to photovoltaic module to be measured, treat and survey photovoltaic module progress illumination simulation by reflected in parallel.
As shown in Fig. 2 be the performance test circuit embodiment of the photovoltaic module of the present invention, in figure, VD, diode, RshWith
RsEntirety is equivalent to a photovoltaic module, wherein, VDFor photovoltaic module to be measured under the illumination simulation of xenon lamp caused photovoltaic electric
Pressure, IDTo flow through the electric current of diode, RshFor the shunt resistance of photovoltaic module to be measured, RsIn series connection for photovoltaic module to be measured
Resistance.The test circuit includes being used to two connection ends being connected with photovoltaic module both positive and negative polarity, one is serially connected between two connection ends
Resistance bridge, resistance bridge include adjustable resistance R, two terminals for accessing equivalent insulaion resistance R3 and two regulation resistances
R1, R2, the first series arm and two for accessing equivalent insulaion resistance of adjustable resistance R and the first regulation resistance R1 compositions
Terminals are in parallel with the second series arm that the second regulation resistance R2 is formed, and are connected between the series connection point of two series arm
One ammeter G.
Insulaion resistance R3 is a kind of characteristic that photovoltaic module has in itself, describes photovoltaic module metal shell and ground
Resistance.When photovoltaic module to be measured is accessed into test circuit, one end of two terminals is used to connect photovoltaic module shell, another
Hold for being connected to ground.
In order that being tested with the test circuit the series resistance of photovoltaic module, foregoing circuit is further changed
Enter, as shown in figure 3, string is provided with first switch K1, the second regulation resistance R2 between adjustable resistance R and the first regulation resistance R1
Second switch K2 is parallel with, string is provided with the 3rd switch K3, institute between the adjustable resistance R connection terminals being connected and insulaion resistance R3
Also string is provided with a voltmeter V between stating two connection terminals.
For ease of calculating, the first adjustable resistance R1 is identical with the second adjustable resistance R2 resistance in the present embodiment.
Present invention also offers a kind of performance test methods of photovoltaic module, when measuring insulaion resistance, including walk as follows
Suddenly：
(1) treat and survey photovoltaic module progress illumination simulation, and intensity of illumination is reached setting value：Adjust the work(of xenon lamp
Rate, reach standard intensity of illumination 1000W/m2。
(2) first regulation resistance R1 and the second regulation resistance R2 are fixed given value, adjust adjustable resistance R, work as adjustable electric
When the current value hindered between R and insulaion resistance R3 is 0, insulaion resistance R3=R2*R/R1 can be obtained.
The measuring principle of above-mentioned measuring method is as follows：In the case where stablizing intensity of illumination, K is closed1、K3, disconnect K2, according to Kiel
Hough current law and Ohm's law：
Obtained by (1) and (2)：
I1(R+R1)-IR1=I3(R3+R2)+IR2 (3)
Due to the R of the present embodiment1=R2, adjust R, as I=0, I1=I3, R3=R, so as to precise measuring volt component
Insulaion resistance R3。
In addition, the test circuit of the present invention can also be to the series resistance R of photovoltaic modulesMeasure, its measurement process is such as
Under：Under illumination simulation intensity, K1、K3Disconnect, K2Close, regulation adjustable resistance R, the indicating value of voltmeter and ammeter is respectively
I, V, a series of R, I, V data are recorded, according to whole circuit law of ohm：
V=IR (4)
Obtained by (4) and (5)
Ask above-mentioned equation reciprocal：
As shown in figure 4,WithLinear relationship is shown as, V is obtained by curve matchingD, thenCompare
The series resistance R of each photovoltaic module to be measureds, RsNumerical value is smaller, and photovoltaic module quality is better.
In addition, according to a series of I and V data measured, I-V curve is obtained by the method for curve matching, such as Fig. 5 institutes
Show, short circuit current, open circuit voltage, fill factor, curve factor, the shunt resistance of photovoltaic module can be calculated, accurately describe photovoltaic module
Performance.The calculating process of each parameter is as follows：As V=0, IscValue be short circuit current；As I=0, VocValue be disconnected
Road voltage；Fill factor, curve factor FF is measuring for solar cell quality (series resistance and parallel resistance), is defined as actual maximum
The power output of power output divided by dreamboat.Wherein, ImAnd VmIt is peak power PmWhen
Voltage and current, ISCAnd VOCIt is short circuit current and open circuit voltage respectively；Shunt resistance RSh passes throughDifferential calculation obtains, i.e.,
Above example is only to illustrative and not limiting technical method of the invention, although with reference to above-described embodiment to this hair
It is bright to be described in detail, it will be understood by those within the art that：The present invention is modified or equivalent substitution, and
Any modification or partial replacement of the spirit and scope of the present invention is not departed from, all should cover and work as in scope of the presently claimed invention
In.
Claims (6)
- A kind of 1. performance test circuit of photovoltaic module, it is characterised in that：Including two for being connected with photovoltaic module both positive and negative polarity Individual connection end, is serially connected with a resistance bridge between two connection end, and the resistance bridge includes adjustable resistance R, for accessing etc. The first of two terminals and two regulation resistances R1, R2 of effect insulaion resistance, adjustable resistance R and the first regulation resistance R1 compositions The second series arm that series arm and two terminals and the second regulation resistance R2 for accessing equivalent insulaion resistance form Parallel connection, an ammeter is connected between the series connection point of two series arm；The series connection point of first series arm and String is provided with first switch K1, the second regulation resistance R2 and is parallel with second switch K2 between one regulation resistance R1, with adjustable resistance R String is provided with the 3rd switch K3 between connected connection end and the series connection point of the second series arm, and one is also parallel with two series arms Voltmeter；The power supply of the test circuit is photovoltaic module to be measured caused photovoltaic voltage under the illumination simulation of xenon lamp.
- 2. the performance test circuit of photovoltaic module according to claim 1, it is characterised in that：The one of described two terminals Hold for connecting photovoltaic module shell, the other end is used to be connected to ground.
- 3. the performance test circuit of photovoltaic module according to claim 2, it is characterised in that：The first regulation resistance R1 It is identical with the second regulation resistance R2 resistance.
- 4. a kind of performance test methods of performance test circuit using photovoltaic module as claimed in claim 1, its feature exist In comprising the following steps：(1) treat and survey photovoltaic module progress illumination simulation, and intensity of illumination is reached setting value；(2) first regulation resistance R1 and the second regulation resistance R2 are fixed given value, adjustable resistance R are adjusted, when the institute of ammeter Show current value be 0 when, obtain insulaion resistance R3=R2*R/R1.
- 5. performance test methods according to claim 4, it is characterised in that:Survey photovoltaic module progress illumination simulation is treated to adopt With after xenon light irradiation concave mirror again reflected in parallel to photovoltaic module to be measured mode.
- 6. the performance test methods according to claim 4 or 5, it is characterised in that:The first regulation resistance R1 and second Regulation resistance R2 is identical.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310439670.9A CN103529302B (en) | 2013-09-24 | 2013-09-24 | The performance test circuit and method of testing of a kind of photovoltaic module |
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| CN201310439670.9A CN103529302B (en) | 2013-09-24 | 2013-09-24 | The performance test circuit and method of testing of a kind of photovoltaic module |
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| CN103529302B true CN103529302B (en) | 2017-12-12 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104007319B (en) * | 2014-06-10 | 2017-02-01 | 湖北工业大学 | Method for measuring equivalent parallel-connection resistance value of multi-junction concentrating solar battery |
| CN108957112A (en) * | 2018-07-04 | 2018-12-07 | 南京中认南信检测技术有限公司 | Photovoltaic module current continuity monitor |
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|---|---|---|---|---|
| CN1465981A (en) * | 2002-06-29 | 2004-01-07 | 骆乃光 | Electric bridge for experiment |
| CN101603988A (en) * | 2008-06-12 | 2009-12-16 | 中茂电子(深圳)有限公司 | Series resistors inside solar energy battery measuring method and measuring system |
| CN102841256A (en) * | 2012-08-23 | 2012-12-26 | 深圳市创益科技发展有限公司 | Insulation test device and method of solar photovoltaic modules |
| CN202870176U (en) * | 2012-10-09 | 2013-04-10 | 浙江埃菲生能源科技有限公司 | Direct-current grounding resistor detection device |
| CN202948043U (en) * | 2012-10-15 | 2013-05-22 | 山东轻工业学院 | Open type Wheatstone bridge experimental instrument |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8305105B2 (en) * | 2008-11-12 | 2012-11-06 | Novasolar Holdings Limited | Simulated mounting structure for testing electrical devices |
| CN102854395B (en) * | 2012-09-04 | 2015-10-21 | 阳光电源（上海）有限公司 | A kind of direct-current power ground insulation resistance detecting circuit and detection method thereof |
| CN204008858U (en) * | 2013-09-24 | 2014-12-10 | 国家电网公司 | A kind of performance test circuit of photovoltaic module |
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2013
- 2013-09-24 CN CN201310439670.9A patent/CN103529302B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1465981A (en) * | 2002-06-29 | 2004-01-07 | 骆乃光 | Electric bridge for experiment |
| CN101603988A (en) * | 2008-06-12 | 2009-12-16 | 中茂电子(深圳)有限公司 | Series resistors inside solar energy battery measuring method and measuring system |
| CN102841256A (en) * | 2012-08-23 | 2012-12-26 | 深圳市创益科技发展有限公司 | Insulation test device and method of solar photovoltaic modules |
| CN202870176U (en) * | 2012-10-09 | 2013-04-10 | 浙江埃菲生能源科技有限公司 | Direct-current grounding resistor detection device |
| CN202948043U (en) * | 2012-10-15 | 2013-05-22 | 山东轻工业学院 | Open type Wheatstone bridge experimental instrument |
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Granted publication date: 20171212 |