CN113872525A - Outdoor photovoltaic module sample test system - Google Patents
Outdoor photovoltaic module sample test system Download PDFInfo
- Publication number
- CN113872525A CN113872525A CN202111126928.0A CN202111126928A CN113872525A CN 113872525 A CN113872525 A CN 113872525A CN 202111126928 A CN202111126928 A CN 202111126928A CN 113872525 A CN113872525 A CN 113872525A
- Authority
- CN
- China
- Prior art keywords
- module
- power optimization
- photovoltaic module
- optimization module
- testing system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 41
- 238000005457 optimization Methods 0.000 claims abstract description 34
- 238000001514 detection method Methods 0.000 claims abstract description 30
- 239000000523 sample Substances 0.000 claims description 43
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 239000013074 reference sample Substances 0.000 claims description 5
- 230000001360 synchronised effect Effects 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000000429 assembly Methods 0.000 description 5
- 230000000712 assembly Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Images
Classifications
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
-
- 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
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Photovoltaic Devices (AREA)
Abstract
The application provides an outdoor photovoltaic module sample test system, includes: the detection device comprises a plurality of detection channels, wherein the detection channels are connected into a constant voltage source load in parallel, each detection channel comprises a tested sample assembly and a power optimization module which are connected in series, and the power optimization module is configured to control the tested sample assembly to work at a specific working voltage or work at a maximum power point all the time. The multi-functional synchronous testing system has the advantages that the multiple parallel detection channels are arranged, tested samples of different power levels and different technical routes can be connected into the system, one machine with multiple functions can be realized, and the tested samples of different technical routes can be synchronously tested and evaluated.
Description
Technical Field
The invention relates to an outdoor photovoltaic module testing technology, in particular to an outdoor photovoltaic module sample testing system.
Background
A plurality of test assemblies of commercial models are generally adopted in a traditional outdoor photovoltaic assembly test system, and a power optimization module is equipped. The power and area requirements of a test sample are generally high, the consistency of the sealed test subunits in the component needs to be ensured, the sample preparation difficulty is high, and the test requirement of a new product in a technical research and development stage is difficult to meet. In addition, the rated power of the power optimization module adopted in the experiment is high, the conversion efficiency of the power optimization module is low when the power optimization module runs at low power, the accuracy of the operation data of the assemblies is influenced by the self-power consumption of the control system, and the difference of each assembly is difficult to accurately evaluate.
Disclosure of Invention
The invention aims to provide an outdoor photovoltaic module sample testing system capable of realizing synchronous testing of a plurality of tested samples.
The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.
According to an aspect of the present invention, there is provided an outdoor photovoltaic module sample testing system, comprising: the detection device comprises a plurality of detection channels, wherein the detection channels are connected into a constant voltage source load in parallel, each detection channel comprises a tested sample assembly and a power optimization module which are connected in series, and the power optimization module is configured to control the tested sample assembly to work at a specific working voltage or work at a maximum power point all the time.
In one embodiment, the system further comprises a reference channel in parallel with the detection channel, the reference channel comprising a reference sample assembly and a power optimization module in series.
In an embodiment, the power optimization module of the system is a boost dc-dc conversion module.
In one embodiment, the power optimization module of the system has an input range from open to short load.
In one embodiment, the power optimization module of the system is controlled by pulse width modulation, and the typical switching frequency of the power optimization module is 200 kHz-500 kHz.
In one embodiment, the power optimization module of the system employs voltage-current dual closed loop control.
In an embodiment, the constant voltage source load of the system includes a storage battery, a load resistor and a control switch, the plurality of detection channels are connected in parallel to the storage battery, and the load resistor and the control switch are connected in series and then connected between the positive pole and the negative pole of the storage battery.
In an embodiment, the constant voltage source load of the system further includes a power supply component and a charge controller, and the power supply component is connected to the storage battery through the charge controller.
The embodiment of the invention has the beneficial effects that: through setting up a plurality of detection passageways that connect in parallel, can be with the system of access of the measured sample of different power grades, different technical route, realize a tractor serves several purposes, carry out synchronous test and aassessment to the measured sample of different technical route.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
The above features and advantages of the present disclosure will be better understood upon reading the detailed description of embodiments of the disclosure in conjunction with the following drawings. In the drawings, components are not necessarily drawn to scale, and components having similar relative characteristics or features may have the same or similar reference numerals.
FIG. 1 is a schematic diagram of a system connection relationship according to an embodiment of the present application;
FIG. 2 is a control block diagram of a power optimization module according to an embodiment of the present disclosure;
wherein: 1-a sample assembly under test; 2-a power optimization module; 3-a storage battery; 4-load resistance; 5-control switch; 6-a charge controller; 7-a power supply component; 8-reference sample assembly.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. It is noted that the aspects described below in connection with the figures and the specific embodiments are only exemplary and should not be construed as imposing any limitation on the scope of the present invention.
Photovoltaic module product needs a large amount of short-term and medium-term outdoor experiments and verifications in the research and development process, and test assembly sample power is generally less, and the classification specification is more, and there is great decay and environmental factor influence probably, and the subassembly output characteristic changes greatly.
Therefore, as shown in fig. 1, the embodiment of the application provides an outdoor photovoltaic module sample testing system, which has very high detection precision and operation stability. The system comprises a plurality of detection channels which are connected into a constant voltage source load in parallel, and each detection channel comprises a tested sample assembly 1 and a power optimization module 2 which are connected in series. Wherein, the power optimization module 2 is configured to control the tested sample assembly 1 to work at a specific working voltage or work at a maximum power point all the time.
The existing photovoltaic testing device usually adopts a mode of connecting components in series to meet the requirement of input voltage of a rear-stage direct current-alternating current grid-connected inverter, and besides a tested sample, a commercial sample with the same power grade needs to be additionally matched, so that extra cost and building difficulty are brought. The system can access the tested sample assemblies 1 with different power levels and different technical routes into the system by arranging the plurality of parallel detection channels, realizes multiple functions, synchronously tests and evaluates the tested samples of different technical routes, and improves the testing efficiency. The system can compare the tested sample assemblies, so that reference samples with the same power grade are not necessary, and the building cost is reduced.
Of course, the system may also be provided with a reference channel to improve the testing accuracy, the reference channel is also connected in parallel with the detection channel, and the reference channel includes the reference sample assembly 8 and the power optimization module 2 connected in series.
The typical output characteristic curve of the photovoltaic module under specific radiation intensity and ambient temperature is a non-linear curve with voltage and current in one-to-one correspondence. The power optimization module connected to the output end of the module needs to have a wide input range from a load open circuit to a short circuit, so in this embodiment, a boost direct current-direct current (DC-DC) conversion module is selected as the power optimization module 2, the output voltage is higher than the input voltage, the adjustment and control of the full voltage range from zero to the open circuit voltage of the output voltage of the photovoltaic module can be realized, the scanning of a voltage-current curve is realized, and the output voltage and the current of the tested sample module 1 can be maintained at a certain specific working point for long-term stable operation.
Under the actual outdoor test condition, along with the change of working environment caused by rising, falling, seasonal variation and weather variation of the sun, the output characteristic of the tested sample changes constantly, the power optimization module 2 needs to have a high-precision maximum power point tracking function, and in this mode, the tested sample assembly 1 can always work in a maximum power point tracking state and can test and compare the long-term performance with the reference sample assembly 8 or other tested sample assemblies 1.
In the embodiment, the boost DC-DC module is controlled by pulse width modulation, and the typical switching frequency is 200-500 kHz. The high-frequency power electronic conversion can enable the input filter capacitor to have very small capacity, can realize quick response speed, and improve tracking precision, thereby improving the response speed of the tested sample assembly 1 under the environment conversion condition and improving the precision of sample evaluation.
Further, the boost DC-DC module can adopt voltage-current double closed-loop control, and the control block diagram is shown in FIG. 2. Wherein v isi_rFor input voltage given signal, ViIs an input voltage, kvfFor inputting voltage detection coefficient, error signals of given voltage signal and voltage detection are passed through proportional-integral controller-Gv(5) Amplified current given signal i as current closed-loop control of later stager，kifThe error signals of the two are used as current detection coefficients through a proportional-integral controller GiAnd(s) the amplified signal is used as the output of a current loop, and a pulse width modulation control signal is output after PWM modulation to control the on-off time of a switching tube, so that the current and the voltage are controlled to track a given signal, and the tracking control of the output voltage of the tested sample assembly 1 is realized.
In this embodiment, the constant voltage source load includes a storage battery 3, a load resistor 4 and a control switch 5, the detection channels are all connected in parallel to the storage battery 3, the load resistor 4 and the control switch 5 are connected in series and then connected between the positive and negative electrodes of the storage battery 3, and the load resistor 4 and the control switch 5 are used for adjusting the charge capacity of the storage battery 3 and maintaining the load voltage stable. Preferably, the constant voltage source load further comprises a power supply assembly 7 and a charge controller 6, wherein the power supply assembly 7 is connected with the storage battery 3 through the charge controller 6 and provides operation energy for the whole test system when the output energy of the tested photovoltaic assembly 1 is very small and is not enough to provide the necessary control energy for the test and communication equipment in the power optimization module 2.
The energy of the tested sample assembly 1 is sent to the storage battery 3 at the output end for storage, and the stored energy can be used as an energy source of a detection control and test communication unit in the power optimization module 2. The power level of the test sample is low, the output energy may not be enough to maintain the stable operation of the system, and in this case, the power supply assembly 7 at the output end charges the storage battery 3 through the charge controller 6, so that the storage battery 3 keeps a certain charge capacity. Under the condition that the power of a test sample is high, the load resistor 4 can be started to consume energy when the storage battery 3 is filled fully, and the charge capacity of the storage battery 3 is reduced. The standby power supply assembly is matched with the fully charged discharge resistor, so that the power supply stability of the system operation can be kept, and the system operation reliability is ensured.
The auxiliary power supply energy of the power optimization module 2, such as testing, driving and the like, comes from the output end of the tested sample assembly 1 or the power supply assembly 7, so that the input control and detection precision can be improved, and the performance comparison precision and accuracy of the tested sample are greatly improved. In addition, the test system that this application disclosed direct current input voltage and bus voltage are very low, can control below human safe voltage, have very high security and reliability, still have and build simple swift, can move the advantage of adjustment at any time.
In summary, the outdoor photovoltaic module sample testing system provided by this embodiment can realize synchronous testing and comparative evaluation of a plurality of samples by connecting each tested sample module in parallel. By arranging the constant-voltage source load and the standby power supply assembly, the power supply stability and the operation reliability of the system operation can be kept, the power can be supplied to the power optimization module, and the detection precision is improved.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosure is provided to enable any person skilled in the art to make or use the disclosure. Various modifications to the disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other variations without departing from the spirit or scope of the disclosure. Thus, the disclosure is not intended to be limited to the examples and designs described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
The above description is only a preferred example of the present application and should not be taken as limiting the present application, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present application should be included in the scope of the present application.
Claims (8)
1. An outdoor photovoltaic module sample testing system, comprising: the detection device comprises a plurality of detection channels, wherein the detection channels are connected into a constant voltage source load in parallel, each detection channel comprises a tested sample assembly and a power optimization module which are connected in series, and the power optimization module is configured to control the tested sample assembly to work at a specific working voltage or work at a maximum power point all the time.
2. The outdoor photovoltaic module sample testing system of claim 1, further comprising a reference channel in parallel with the detection channel, the reference channel comprising a reference sample assembly and a power optimization module in series.
3. The outdoor photovoltaic module sample testing system of claim 1 or 2, wherein the power optimization module is a boost dc-dc conversion module.
4. The outdoor photovoltaic module sample testing system of claim 3, wherein the power optimization module has an input range from a load open circuit to a short circuit.
5. The outdoor photovoltaic module sample testing system according to claim 4, wherein the power optimization module is controlled by pulse width modulation, and the typical switching frequency of the power optimization module is 200 kHz-500 kHz.
6. The outdoor photovoltaic module sample testing system according to claim 5, wherein the power optimization module employs voltage-current double closed loop control.
7. The outdoor photovoltaic module sample testing system according to claim 1, wherein the constant voltage source load comprises a storage battery, a load resistor and a control switch, the plurality of detection channels are connected to the storage battery in parallel, and the load resistor and the control switch are connected between a positive electrode and a negative electrode of the storage battery after being connected in series.
8. The outdoor photovoltaic module sample testing system according to claim 7, wherein the constant voltage source load further comprises a power supply module and a charge controller, wherein the power supply module is connected with the storage battery through the charge controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111126928.0A CN113872525A (en) | 2021-09-26 | 2021-09-26 | Outdoor photovoltaic module sample test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111126928.0A CN113872525A (en) | 2021-09-26 | 2021-09-26 | Outdoor photovoltaic module sample test system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113872525A true CN113872525A (en) | 2021-12-31 |
Family
ID=78994226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111126928.0A Pending CN113872525A (en) | 2021-09-26 | 2021-09-26 | Outdoor photovoltaic module sample test system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113872525A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104617876A (en) * | 2015-02-02 | 2015-05-13 | 河海大学常州校区 | Outdoor test platform of solar photovoltaic modules and electricity generation performance online analysis method thereof |
| CN104932603A (en) * | 2015-05-14 | 2015-09-23 | 工业和信息化部邮电工业标准化研究所 | Testing system and method of maximum power point tracing accuracy of photovoltaic controller |
| CN105897161A (en) * | 2016-06-06 | 2016-08-24 | 河海大学常州校区 | Outdoor photovoltaic module detection system based on dynamic capacitance charge and discharge and test method |
| CN106712716A (en) * | 2017-02-10 | 2017-05-24 | 阳光电源股份有限公司 | IV curve scanning method of photovoltaic module and optimizer |
| CN106899268A (en) * | 2017-04-14 | 2017-06-27 | 中国科学院上海微***与信息技术研究所 | Multichannel photovoltaic module outdoor generating characteristic and grid-connected decay situation test system |
| CN107959475A (en) * | 2017-11-29 | 2018-04-24 | 中国电力科学研究院有限公司 | A kind of photovoltaic module outdoor test system and method |
| CN113193595A (en) * | 2021-05-12 | 2021-07-30 | 丰郅(上海)新能源科技有限公司 | Safety management system and safety management method for photovoltaic module |
| CN213846610U (en) * | 2020-11-09 | 2021-07-30 | 苏州阿特斯阳光电力科技有限公司 | Photovoltaic module testing arrangement |
| CN216313045U (en) * | 2021-09-26 | 2022-04-15 | 苏州安步新能源科技有限公司 | Outdoor photovoltaic module sample test system |
-
2021
- 2021-09-26 CN CN202111126928.0A patent/CN113872525A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104617876A (en) * | 2015-02-02 | 2015-05-13 | 河海大学常州校区 | Outdoor test platform of solar photovoltaic modules and electricity generation performance online analysis method thereof |
| CN104932603A (en) * | 2015-05-14 | 2015-09-23 | 工业和信息化部邮电工业标准化研究所 | Testing system and method of maximum power point tracing accuracy of photovoltaic controller |
| CN105897161A (en) * | 2016-06-06 | 2016-08-24 | 河海大学常州校区 | Outdoor photovoltaic module detection system based on dynamic capacitance charge and discharge and test method |
| CN106712716A (en) * | 2017-02-10 | 2017-05-24 | 阳光电源股份有限公司 | IV curve scanning method of photovoltaic module and optimizer |
| CN106899268A (en) * | 2017-04-14 | 2017-06-27 | 中国科学院上海微***与信息技术研究所 | Multichannel photovoltaic module outdoor generating characteristic and grid-connected decay situation test system |
| CN107959475A (en) * | 2017-11-29 | 2018-04-24 | 中国电力科学研究院有限公司 | A kind of photovoltaic module outdoor test system and method |
| CN213846610U (en) * | 2020-11-09 | 2021-07-30 | 苏州阿特斯阳光电力科技有限公司 | Photovoltaic module testing arrangement |
| CN113193595A (en) * | 2021-05-12 | 2021-07-30 | 丰郅(上海)新能源科技有限公司 | Safety management system and safety management method for photovoltaic module |
| CN216313045U (en) * | 2021-09-26 | 2022-04-15 | 苏州安步新能源科技有限公司 | Outdoor photovoltaic module sample test system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6844739B2 (en) | Maximum power point tracking method and device | |
| US8093872B2 (en) | Method for Maximum Power Point Tracking of photovoltaic cells by power converters and power combiners | |
| Wolfs et al. | A single cell maximum power point tracking converter without a current sensor for high performance vehicle solar arrays | |
| CN103546021B (en) | Current feedback method and current feedback circuit and drive circuit and Switching Power Supply | |
| CN103440019A (en) | Analogy control circuit capable of achieving photovoltaic cell maximum power point tracing | |
| Hassanalieragh et al. | Solar-supercapacitor harvesting system design for energy-aware applications | |
| CN110247456B (en) | Multi-lithium battery equalization management switch system and current detection method thereof | |
| CN206164168U (en) | Charging control circuit and charger | |
| CN102751790A (en) | Hybrid energy storage system based on supercapacitor in solar photovoltaic system | |
| CN216313045U (en) | Outdoor photovoltaic module sample test system | |
| CN102665314B (en) | Improved MPPT (Maximum Power Point Tracking) algorithm and LED (Light Emitting Diode) street lamp system based on algorithm | |
| CN203535530U (en) | Analog control circuit for tracking maximum power point of photovoltaic cell | |
| CN114156945A (en) | Photovoltaic micro-grid island mode power generation device and control method thereof | |
| CN108899987B (en) | Solar charging control circuit with MPPT function | |
| CN202696290U (en) | Hybrid energy storage system based on super-capacitors in solar photovoltaic system | |
| CN108181966B (en) | Photovoltaic multimodal MPP rapid tracking method based on voltage-power scanning | |
| CN204651970U (en) | There is the charge-discharge controller of battery current detection circuit | |
| CN106992570B (en) | Microbial fuel cell energy acquisition and self-powered circuit and method | |
| CN113872525A (en) | Outdoor photovoltaic module sample test system | |
| CN107302311A (en) | Ultralow input power energy supply circuit for passive sensory network and the energy supply method using the circuit realiration | |
| US9825584B2 (en) | Sampling duration control for power transfer efficiency | |
| CN104242394A (en) | Active equalization circuit and equalization method of series batteries | |
| CN201364513Y (en) | Expandable constant current source device | |
| KR20060091450A (en) | Charge balancing circuit for solar cell and rechargeable lithium battery | |
| CN112379149A (en) | On-load and on-load current measurable simulation battery pack circuit and simulation battery pack thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |