Method for measuring efficiency of photovoltaic power station system

Abstract

The invention discloses a method for measuring the efficiency of a photovoltaic power station system, and relates to the field of photovoltaic power generation equipment detection. The system comprises a photovoltaic cell panel, a miniature inverter, a DC meter, a data collector, a temperature collector, an intelligent analyzer (a PC), and a cloud platform part. The beneficial effects of the invention are that the detected photovoltaic cell panel is smaller in irradiance receiving error, and is convenient to correct; the method can calculate a PR value, and the PR value is more suitable for the basic condition of the power station; the method can achieve the correction and testing of the attenuation power of an online working photovoltaic cell panel under the conditions of the same irradiance and temperature, and saves time and labor; the method can carry out the intelligent analysis and comparison of the power of a clean photovoltaic cell panel and a normal photovoltaic cell panel under the conditions of the same irradiance and temperature, calculates the impact on the photovoltaic cell panel from dust sheltering, determines the optimal washing time, and carries the accumulative analysis of the impact on the photovoltaic panel power generation from environment temperature and the temperature of a photovoltaic back plate through comparing the environment temperature with the temperature of the photovoltaic back plate.

Description

1. Technical field [0001] The invention relates to the field of detection of photovoltaic power generation equipment, in particular to a method for measuring the effectiveness of a photovoltaic power station system. 2. Background technology [0002] At present, most of the pyranometers in our country are thermoelectric. The pyranometer has a wide spectral range, generally roughly from 280nm to 3000nm in the full spectrum of the sun. The working range of solar cells is 400nm to 1100nm. The spectral range collected by the pyranometer is much larger than the working range spectrum of the solar cell, which makes the thermoelectric pyranometer unable to truly reflect the radiation received by the photovoltaic cell panel. Traditional irradiance meters do not take into account the influence of temperature on solar panel power generation, resulting in inaccurate PR values ​​and large errors. Imported high-precision irradiance instruments are expensive, and domestic instruments have ...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the pyranometers in our country are thermoelectric. The pyranometer has a wide spectral range, generally roughly from 280nm to 3000nm in the full spectrum of the sun. The working range of solar cells is 400nm to 1100nm. The spectral range collected by the pyranometer is much larger than the working range spectrum of the solar cell, so the thermoelectric pyranometer cannot truly reflect the radiation received by the photovoltaic cell panel

Traditional irradiance meters do not take into account the influence of temperature on solar panel power generation, resulting in inaccurate PR values ​​and large errors, imported high-precision irradiance instruments are expensive, and domestic instruments have low accuracy

Due to the different materials of the internal components of the irradiance, the attenuation of the internal photosensitive element and the influence of environmental factors cannot be calculated, and the calibration is inconvenient

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