Portable photovoltaic subassembly power testing instrument and testing method thereof

Abstract

The invention relates to a portable photovoltaic subassembly power testing instrument and a testing method thereof, in particular to a hand-hold portable photovoltaic subassembly power testing instrument and a testing method thereof applied under the nonstandard environment. The power testing instrument comprises a standard photovoltaic subassembly, a port, current sensors used for measuring short circuit current of the standard photovoltaic subassembly and the short circuit current of a tested photovoltaic subassembly, and a microprocessor used for calculating the standard power of the tested photovoltaic subassembly. The testing method is on the basis of a formula that 'standard power of the tested photovoltaic subassembly is equal to standard power of the standard photovoltaic subassembly* open-circuit voltage of the tested photovoltaic subassembly* short circuit current of the tested photovoltaic subassembly / open-circuit voltage of the standard photovoltaic subassembly* short circuit current of the standard photovoltaic subassembly'. According to the portable photovoltaic subassembly power testing instrument and the testing method provided by the invention, the standard power can be obtained without debugging when the environment is varied; and the portable photovoltaic subassembly power testing instrument and the testing method can be applied to the indoor and outdoor, therefore, the detecting process of a photovoltaic subassembly can be simplified, and the efficiency can be maximized, and the problem that the power test is carried out with low efficiency and high cost caused by adopting a solar simulator for a long time can be completely solved.

Description

technical field [0001] The invention relates to a portable photovoltaic module power testing instrument and a measuring method thereof, in particular to a hand-held portable photovoltaic module power testing instrument and a measuring method thereof applied in a non-standard environment. Background technique [0002] When the solar cell is actually used, many blocks must be connected in series to form a photovoltaic module, and then the photovoltaic module is connected in series and parallel to form a photovoltaic array, but the output voltage and current of the solar cell made according to the principle of photoelectric conversion will be affected by the intensity of the sun. Therefore, it cannot guarantee the minimization of the power error of each photovoltaic module that constitutes the photovoltaic array, which will bring great inconvenience to outdoor installation and reasonable matching of the system. Therefore, it is necessary to use a non-standard environment A phot...

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Problems solved by technology

[0002] When the solar cell is actually used, many blocks must be connected in series to form a photovoltaic module, and then the photovoltaic module is connected in series and parallel to form a photovoltaic array, but the output voltage and current of the solar cell made according to the principle of photoelectric conversion will be affected by the intensity of the sun. Therefore, it cannot guarantee the minimization of the power error of each photovoltaic module that constitutes the photovoltaic array, which will bring great inconvenience to outdoor installation and reasonable matching of the system. Therefore, it is necessary to use a non-standard environment Photovoltaic module tester for testing the power of photovoltaic modules

At present, a solar simulator or a portable array module tester is generally used as a photovoltaic module tester to measure photovoltaic modules; but the solar simulator is only suitable for indoor operation, not for outdoor operation; the portable array module tester uses a combination of temperature and sunshine The way of testing, its operation is cumbersome, and the cost is high

Existing photovoltaic module testing instruments must perform complex measurements to adjust the environmental radiation intensity, temperature, and humidity. This test method will cause troubles such as inconvenient movement of the instrument during the measurement work and high workmanship costs.

Determining the best power point of the component through the characteristics of ambient temperature, strength, humidity, etc. This existing detection technology will highlight the disadvantages of inconvenient movement and complicated work during each measurement process

[0003] At present, there are no related products for handheld measurement of photovoltaic modules under non-standard measurement conditions at home and abroad. The reason is that the volt-ampere characteristics of photovoltaic modules are nonlinear, and it is difficult to establish a power evaluation method.

Under the standard measurement conditions provided by the laboratory, the power of photovoltaic modules can be easily evaluated, but a measuring instrument that can quickly evaluate the power of photovoltaic modules under non-standard conditions is difficult to achieve with the existing technology. But this is also the development trend of photovoltaic power measurement instrument research and development

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