CN106533359A - Photovoltaic assembly outdoor testing device and method of programmable compensation design - Google Patents
Photovoltaic assembly outdoor testing device and method of programmable compensation design Download PDFInfo
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- CN106533359A CN106533359A CN201610838304.4A CN201610838304A CN106533359A CN 106533359 A CN106533359 A CN 106533359A CN 201610838304 A CN201610838304 A CN 201610838304A CN 106533359 A CN106533359 A CN 106533359A
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- 238000012360 testing method Methods 0.000 title claims abstract description 84
- 238000013461 design Methods 0.000 title claims abstract description 16
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- 230000005611 electricity Effects 0.000 claims description 10
- 238000010998 test method Methods 0.000 claims description 5
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- 238000002955 isolation Methods 0.000 abstract description 3
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- 238000005516 engineering process Methods 0.000 description 5
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- 239000003990 capacitor Substances 0.000 description 2
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- 238000010586 diagram Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
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Classifications
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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- Testing Of Individual Semiconductor Devices (AREA)
Abstract
The invention discloses a photovoltaic assembly outdoor testing device and method of programmable compensation design, which belongs to the technical field of testing. The device comprises a compensation power supply control circuit and a test loop for a photovoltaic assembly. The invention realizes the isolation of a photovoltaic assembly independent discharge loop and the photovoltaic assembly and a compensation power supply series discharge loop through the parallel relationship between a diode and a compensation power supply, adds a relay to the front end of the compensation power supply, and realizes the discharge control to the compensation power supply, so that a preset voltage value is involved in the testing of a discharge loop of the photovoltaic assembly, thereby solving the problem of the discharge current limitation of the photovoltaic assembly as the impedance in the discharge loop of the photovoltaic assembly cannot be zeroed. The compensation power supply control circuit can timely get involved in the test loop of the photovoltaic assembly, requirements for testing around the short circuit current of the photovoltaic assembly can be met, the accuracy of outside testing of the photovoltaic assembly can be improved, the electric quantity of the testing device is saved, and the testing time is prolonged.
Description
Technical field
The invention belongs to technical field of measurement and test, and in particular to a kind of photovoltaic module outdoor test dress of programmable Compensation Design
Put and method.
Background technology
A photovoltaic module correspondence unequally loaded output voltage current curve is mainly tested in test to photovoltaic cell,
Test curve contains change procedure of the photovoltaic module from short-circuit condition to open-circuit condition.As the internal resistance of test circuit is present,
When the short circuit current of tested photovoltaic module is tested, its real short-circuit condition cannot be tested under normal circumstances.In laboratory
Under the conditions of, the general method using four-quadrant power supply is tested to the C-V characteristic of photovoltaic cell.Four-quadrant power supply and photovoltaic
Battery is connected in test loop, you can participating in electric discharge can also absorb electric current as variable load, and power supply may participate in photovoltaic electric
The whole load change procedure in pond.Scan near short circuit current in load curve, discharge voltage is provided substantially by power supply, is made
Photovoltaic cell output current reaches maximum, and output voltage is zero, so as to draw out complete VA characteristic curve.But due to four-quadrant
Ration the power supply source summation watt rating it is larger, out of doors in battery powered photovoltaic cell test equipment, it is impossible to which sufficient electricity is provided, one
As in the case of test equipment near short circuit current by the way of curve matching, synthesized near short circuit current using software
Curve.As the method tested is limited, cannot get real photovoltaic cell short circuit current.
The content of the invention
For above-mentioned technical problem present in prior art, the present invention proposes a kind of photovoltaic of programmable Compensation Design
Component open air test setups and method, it is reasonable in design, the deficiencies in the prior art are overcome, with good promotional value.
To achieve these goals, the present invention is adopted the following technical scheme that：
A kind of photovoltaic module open air test setups of programmable Compensation Design, including compensation power control circuit and photovoltaic group
The test loop of part；The compensation controlling power circuit includes charge power supply, isolating transformer, compensation power supply and relay,
Charge power supply, isolating transformer, compensation power supply, relay are sequentially connected by circuit；The test loop bag of the photovoltaic module
Include positive pole, the negative pole of photovoltaic module, diode and the test load of photovoltaic module, one end of the positive pole of photovoltaic module by after
One end connection of electrical equipment and compensation power control circuit, the other end of the positive pole of photovoltaic module by diode, test load and
The negative pole connection of photovoltaic module, the other end for compensating power control circuit are connected to diode and test load by compensating power supply
The common port of composition.
Preferably, compensating power supply adopts electric capacity, one end connection of the negative pole and relay of electric capacity, the positive pole of electric capacity to be connected to
The common port of diode and test load composition.
Additionally, the present invention is it is also mentioned that a kind of photovoltaic module outdoor test method of programmable Compensation Design, the method employing
A kind of photovoltaic module open air test setups of programmable Compensation Design as above, are carried out in accordance with the following steps：
Step 1：Preparation before test
The resistance value of test load is adjusted to into maximum, and is off relay, by charge power supply to compensation
Power source charges；
Step 2：Start test
Step 2.1：Disconnect charge power supply；
Step 2.2：The setting voltage value of photovoltaic module is set
Step 2.2.1：Obtain short-circuit current value and temperature coefficient of the photovoltaic module in specific irradiation level with a temperature of；
Step 2.2.2：Read current real-time irradiation level；
Step 2.2.3：The real-time maximum short circuit current value of photovoltaic module under conditions present is calculated according to formula (1)；
I=Isc* (E/1000) * (1+ α) (1)
Wherein, I is the real-time maximum short circuit current value of photovoltaic module under conditions present；Isc is photovoltaic module in specific spoke
Short-circuit current value of the illumination with a temperature of；α is temperature coefficient of the photovoltaic module in specific irradiation level with a temperature of；E is current
Real-time irradiation level；
Step 2.2.4：Real-time maximum short circuit current value I is amplified the maximum internal resistance phase with test loop after processing
Take advantage of, obtain the setting voltage value of photovoltaic module；
Step 2.3：Adjust test load so as to which resistance is gradually reduced, then the output voltage of photovoltaic module is also gradually reduced,
When the output voltage of photovoltaic module is less than its setting voltage value, relay adhesive, compensation power supply start electric discharge, and maintain light
Till volt component output voltage is 0V；
Step 2.4：Relay is disconnected, test is completed.
Preferably, in step 2.2.1, irradiation level adopts 1000W/m2, temperature is using 25 DEG C.
Preferably, in step 2.2.4, test loop maximum internal resistance is 400m Ω
The Advantageous Effects brought by the present invention：
The present invention proposes a kind of photovoltaic module open air test setups of programmable Compensation Design and method, with prior art
Compare, by diode and the parallel relationship of compensation power supply, realize photovoltaic module independence discharge loop and photovoltaic module and benefit
The isolation of power sources in series discharge loop is repaid, and relay is added in compensation power supply front end, realize the electric discharge control to compensating power supply
System, so as to realize participating in the test of photovoltaic module discharge loop by preset voltage value, hinders in solving photovoltaic module discharge loop
It is anti-cannot photovoltaic module discharge current restricted problem caused by zero setting.
Compensation power control circuit in the present invention can intervene the test loop of photovoltaic module in good time, can complete photovoltaic
Testing requirement of the component near short circuit current, improves the accuracy of the outdoor test of photovoltaic module again, and saves test
The electricity of device, extends the testing time；On PLC technology strategy, unique pre- evaluation algorithm of discharge current, tool is designed
There are automatic setting compensation power supply intervention moment arbitration functions, compensation corona discharge electricity can be automatically adjusted, there is provided be outdoor reliable long
The C-V characteristic test of time, realizes complete VA characteristic curve test rapidly and efficiently.
Description of the drawings
Fig. 1 is compensation power work interval diagram.
Fig. 2 is a kind of hardware circuit principle figure of the photovoltaic module open air test setups of programmable Compensation Design of the present invention.
Wherein, 1- charge power supplies；2- isolating transformers；3- electric capacity；4- relays；5- photovoltaic module positive poles；6- diodes；
7- test loads；8- photovoltaic module negative poles.
Specific embodiment
Below in conjunction with the accompanying drawings and specific embodiment is described in further detail to the present invention：
Embodiment 1：
As shown in shadow region in Fig. 1, Vadd represents the minimum pressure drop in photovoltaic module test loop, if being not added with compensation electricity
Source, when test load is gradually reduced, when the decline of photovoltaic module voltage reaches diagram Vadd positions, due to the increase battery electricity of electric current
Pressure can follow decline, not reach the driving voltage requirement that test circuit loads two ends, and photovoltaic cell cannot output current.Vadd
The size of voltage is related to the short circuit current of photovoltaic module and test loop minimum resistance.Selection and Design of the present invention by load
Strict control loop resistance, but consider device technology present situation up till now, loop resistance minimum can reach more than 200m Ω, it is considered to
One times or so surplus design, test loop resistance are intended consideration and reach 400m Ω.The short circuit current most conference of normal photovoltaic module reaches
To 10A, it is contemplated that the development of technology, it is contemplated that largest component short circuit current to 20A, the estimated minimum driving voltage of test loop is needed
Reach 8V, that is, the minimum voltage that compensation power supply need to reach.Now the output current of photovoltaic cell is also close to maximum, therefore
The power output of compensation power supply will reach more than 160W.
Test device as shown in Figure 2, including compensation power control circuit and the test loop of photovoltaic module；Compensation control
Power circuit includes charge power supply 1, isolating transformer 2, electric capacity 3 and relay 4, charge power supply 1, isolating transformer 2, electric capacity
3 and relay 4 be sequentially connected by circuit, the test loop of photovoltaic module includes the positive pole 5, photovoltaic module of photovoltaic module
Negative pole 8, diode 6 and test load 7, one end of the positive pole 5 of photovoltaic module is by relay 4 and compensation power control circuit
One end connection, the other end of the positive pole 5 of photovoltaic module connected by the negative pole 8 of diode 6, test load 7 and photovoltaic module,
The other end of compensation power control circuit is connected to the common port of diode 6 and the composition of test load 7 by electric capacity 3.
Use electric capacity 3 as compensation power supply, one end connection of the negative pole of electric capacity 3 and relay 4, the positive pole of electric capacity 3 connect
It is connected to the common port of diode 6 and the composition of test load 7.
Embodiment 2：
On the basis of above-described embodiment, the present invention is also mentioned that a kind of photovoltaic module outdoor test method, before test
Test load hinders 7 values and is adjusted to maximum, and relay 4 disconnects, and compensation power capacitor 3 is separated with tested photovoltaic module, by filling
Power supply 1 is fully charged to electric capacity, and isolating transformer 2 plays a part of isolation.When test starts, charge power supply 1 is disconnected, adjust and survey
Examination load 7 so as to which resistance changes from big to small, then the output current increase of photovoltaic module, output voltage reduce.Work as output voltage
During less than setting voltage Vadd, 4 adhesive of relay, compensation power capacitor 3 start electric discharge, and maintain photovoltaic module output voltage
For 0V, relay 4 is disconnected, whole test process is completed.
The intervention of compensation power supply arranges the key that voltage is also the present invention.Electric capacity can be reduced as far as possible by rational design
Discharge electricity amount, reduce power consumption.Setting with regard to setting voltage Vadd is as follows：First by the famous brand of photovoltaic module or its
His approach obtains photovoltaic module in irradiation level 1000W/m2, short-circuit current value Isc at 25 DEG C and temperature coefficient α (units A/
DEG C), then read current irradiation level E in real time.Photovoltaic under conditions present is calculated according to formula I=Isc* (E/1000) * (1+ α)
The real-time maximum short circuit current theoretical value of component, is multiplied with possible maximum internal resistance 400m Ω after then suitably amplify I, is obtained
Setting voltage Vadd.
The present invention realizes photovoltaic module independence discharge loop and photovoltaic by diode and the parallel relationship of compensation power supply
Component is isolated with compensation power sources in series discharge loop, and adds relay in compensation power supply front end, realizes to compensating power supply
Control of discharge, solving photovoltaic module discharge loop middle impedance photovoltaic module discharge current cannot limit and ask caused by zero setting
Topic.
Compensation power control circuit in the present invention can intervene the test loop of photovoltaic module in good time, can complete photovoltaic
Testing requirement of the component near short circuit current, improves the accuracy of the outdoor test of photovoltaic module again, and saves test
The electricity of device, extends the testing time；On PLC technology strategy, unique pre- evaluation algorithm of discharge current, tool is designed
There are automatic setting compensation power supply intervention moment arbitration functions, compensation corona discharge electricity can be automatically adjusted, there is provided be outdoor reliable long
The C-V characteristic test of time, realizes complete VA characteristic curve test rapidly and efficiently.
Certainly, described above is not limitation of the present invention, and the present invention is also not limited to the example above, this technology neck
Change, remodeling, addition or replacement that the technical staff in domain is made in the essential scope of the present invention, should also belong to the present invention's
Protection domain.
Claims (5)
1. a kind of photovoltaic module open air test setups of programmable Compensation Design, it is characterised in that：Including compensation power supply electricity
Road and the test loop of photovoltaic module；It is described compensation controlling power circuit include charge power supply, isolating transformer, compensation power supply with
And relay, charge power supply, isolating transformer, compensation power supply, relay are sequentially connected by circuit；The survey of the photovoltaic module
Examination loop includes the positive pole of photovoltaic module, the negative pole of photovoltaic module, diode and test load, the one of the positive pole of photovoltaic module
One end connection of the end by relay and compensation power control circuit, the other end of the positive pole of photovoltaic module pass through diode, survey
Examination load and photovoltaic module negative pole connect, compensate power control circuit the other end by compensate power supply be connected to diode with
The common port of test load composition.
2. photovoltaic module open air test setups according to claim 1, it is characterised in that：Compensation power supply adopts electric capacity, electricity
One end connection of the negative pole and relay of appearance, the positive pole of electric capacity are connected to the common port of diode and test load composition.
3. a kind of photovoltaic module outdoor test method of programmable Compensation Design, it is characterised in that：Using as claimed in claim 1
A kind of programmable Compensation Design photovoltaic module open air test setups, comprise the steps：
Step 1：Preparation before test
The resistance value of test load is adjusted to into maximum, and is off relay, compensation power supply is given by charge power supply
Charge；
Step 2：Start test
Step 2.1：Disconnect charge power supply；
Step 2.2：The setting voltage value of photovoltaic module is set
Step 2.2.1：Obtain short-circuit current value and temperature coefficient of the photovoltaic module in specific irradiation level with a temperature of；
Step 2.2.2：Read current real-time irradiation level；
Step 2.2.3：The real-time maximum short circuit current value of photovoltaic module under conditions present is calculated according to formula (1)；
I=Isc* (E/1000) * (1+ α) (1)
Wherein, I is the real-time maximum short circuit current value of photovoltaic module under conditions present；Isc is photovoltaic module in specific irradiation level
Short-circuit current value with a temperature of；α is temperature coefficient of the photovoltaic module in specific irradiation level with a temperature of；E is current real-time
Irradiation level；
Step 2.2.4：It is multiplied with the maximum internal resistance of test loop after real-time maximum short circuit current value I is amplified process, obtains
To the setting voltage value of photovoltaic module；
Step 2.3：Adjust test load so as to which resistance is gradually reduced, then the output voltage of photovoltaic module is also gradually reduced, and works as light
When the output voltage of volt component is less than its setting voltage value, relay adhesive, compensation power supply start electric discharge, and maintain photovoltaic group
Till part output voltage is 0V；
Step 2.4：Relay is disconnected, test is completed.
4. photovoltaic module outdoor test method according to claim 3, it is characterised in that：In step 2.2.1, irradiation level
Using 1000W/m2, temperature is using 25 DEG C.
5. photovoltaic module outdoor test method according to claim 3, it is characterised in that：In step 2.2.4, test back
Road maximum internal resistance is 400m Ω.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107908120A (en) * | 2017-11-24 | 2018-04-13 | 常州工学院 | A kind of apparatus and method for simulating photovoltaic panel working status |
| CN110557091A (en) * | 2019-08-02 | 2019-12-10 | 中电科仪器仪表(安徽)有限公司 | High-voltage large-current photovoltaic array IV curve test circuit and test method |
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| CN101752877A (en) * | 2010-01-15 | 2010-06-23 | 合肥工业大学 | Photovoltaic synchronization inverter with photovoltaic array IV test function and test method |
| CN102768294A (en) * | 2012-08-11 | 2012-11-07 | 中国电子科技集团公司第四十一研究所 | Multi-section approximate volt-ampere characteristic simulation device of solar cells |
| CN102879722A (en) * | 2012-09-20 | 2013-01-16 | 江苏技术师范学院 | Volt-ampere performance testing device and method for solar array |
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2016
- 2016-09-21 CN CN201610838304.4A patent/CN106533359B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101752877A (en) * | 2010-01-15 | 2010-06-23 | 合肥工业大学 | Photovoltaic synchronization inverter with photovoltaic array IV test function and test method |
| CN102768294A (en) * | 2012-08-11 | 2012-11-07 | 中国电子科技集团公司第四十一研究所 | Multi-section approximate volt-ampere characteristic simulation device of solar cells |
| CN102879722A (en) * | 2012-09-20 | 2013-01-16 | 江苏技术师范学院 | Volt-ampere performance testing device and method for solar array |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107908120A (en) * | 2017-11-24 | 2018-04-13 | 常州工学院 | A kind of apparatus and method for simulating photovoltaic panel working status |
| CN110557091A (en) * | 2019-08-02 | 2019-12-10 | 中电科仪器仪表(安徽)有限公司 | High-voltage large-current photovoltaic array IV curve test circuit and test method |
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