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Temperature control device for photovoltaic module I-V characteristic field test and using method thereof

A photovoltaic module and characteristic testing technology, applied in the monitoring of photovoltaic systems, photovoltaic power generation, photovoltaic modules, etc., can solve the problems of high light source level requirements, increased uncertainty, heavy workload, etc., to achieve easy operation and reduce heat exchange , the effect of light weight

Active Publication Date: 2020-03-27
ELECTRIC POWER RES INST OF STATE GRID ZHEJIANG ELECTRIC POWER COMAPNY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The test site under the simulated light source is in the indoor testing room, which has high requirements on the level of the light source. It is necessary to disassemble the sampled photovoltaic modules on site and transport them to the indoor testing room. The workload is heavy, and collisions and cracks are prone to occur during the transport process.
[0003] At this stage, most of the I-V characteristic tests of photovoltaic modules in the on-site performance test of photovoltaic power stations are carried out by portable I-V testers in natural light, and the measured values ​​are corrected to STC conditions by referring to IEC60891-2009 "I-V Measured Characteristics of Photovoltaic Modules Temperature and Irradiance Correction Method" Below; the revision involves the empirical formula, which increases the uncertainty, and there is a certain deviation from the results of the indoor test

Method used

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  • Temperature control device for photovoltaic module I-V characteristic field test and using method thereof
  • Temperature control device for photovoltaic module I-V characteristic field test and using method thereof
  • Temperature control device for photovoltaic module I-V characteristic field test and using method thereof

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Experimental program
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Embodiment 1

[0035] This embodiment provides a temperature control device suitable for on-site testing of the I-V characteristics of photovoltaic modules, which can control the operating temperature of the photovoltaic modules under test under STC conditions, eliminate errors caused by temperature correction, and improve test accuracy. structured as figure 1 shown.

[0036] The temperature control device consists of a temporary gas storage space 2, an air circulation pipe 3, a mobile solar air conditioner 4, a multi-zone temperature control system 5 and a power module 6.

[0037] The backplane of the photovoltaic module 1 tested on site is softly connected with the insulation cloth to form a temporary gas storage space 2, and there are gaps around the joint for air outlet; four air inlets are left around the formed temporary gas storage space 2, which are used to Connect the four air outlets of the air circulation pipe 3, and introduce the air of the required temperature into the temporar...

Embodiment 2

[0041] This embodiment provides a method for using a temperature control device suitable for on-site testing of I-V characteristics of photovoltaic modules.

[0042]After connecting the system according to the structural requirements of the above-mentioned temperature control device, set the required temperature value in the controller 13 . The arranged temperature probe 12 monitors the temperature of the backplane of the photovoltaic module 1 under test and the temperature of the temporary gas storage space 2 in real time. When the average value of the monitored temperatures does not meet the set requirements, the controller 13 feeds back a signal to adjust the mobile solar energy. The air temperature and air volume of the air conditioner 4; when it is detected that the temperature distribution in each area is unbalanced, adjust the opening of each air outlet damper of the air circulation duct 3, and change the corresponding air volume.

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Abstract

The invention discloses a temperature control device for photovoltaic module field I-V characteristic test and a use method thereof. The temperature control device comprises: a temporary gas storage space which is formed by heat preservation cloth and a back plate of a photovoltaic module to be tested; a mobile solar air conditioner; an air circulation pipeline, wherein one end of the air circulation pipeline is connected with an air outlet of the mobile solar air conditioner, and the other end of the air circulation pipeline is connected with the air inlet interfaces of the temporary air storage space for conveying air with required temperature into the temporary air storage space; and a multi-area temperature control system which is composed of a plurality of temperature probes and a controller, wherein the temperatures of the back plate of the photovoltaic module to be tested and the temporary gas storage space are controlled by adjusting the opening degree of each air outlet of theair circulation pipeline. According to the temperature control device, when the photovoltaic module I-V characteristic test is carried out on site, the working temperature of the photovoltaic modulecan be effectively controlled to be under the STC condition, errors caused by temperature correction are eliminated, and the accuracy and reliability of the test are improved.

Description

technical field [0001] The invention belongs to the field of on-site testing of photovoltaic power plants, in particular to a temperature control device for on-site testing of I-V characteristics of photovoltaic modules and a method for using the same. Background technique [0002] The IV curve, decay rate and maximum power tests of photovoltaic modules are required to be carried out under natural light or simulated light sources above Class A. The test site under the simulated light source is in the indoor testing room, which has high requirements on the level of the light source. It is necessary to dismantle the sampled photovoltaic modules on site and transport them to the indoor testing room. The workload is heavy, and collisions and cracks are prone to occur during the transport process. [0003] At this stage, most of the I-V characteristic tests of photovoltaic modules in the on-site performance test of photovoltaic power plants are carried out in natural light with p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02S50/10F24H3/00F24H9/20
CPCF24H3/002F24H9/2071H02S50/10Y02E10/50
Inventor 蔡洁聪朱凌云吕洪坤王伟
Owner ELECTRIC POWER RES INST OF STATE GRID ZHEJIANG ELECTRIC POWER COMAPNY