Photovoltaic cell panel ash deposition state monitoring system and cleaning period optimization method

Abstract

A Photovoltaic cell panel ash deposition state monitoring system is characterized in that: the output end of an environmental temperature and humidity sensor is connected with the first input end of a data collector, the output end of a solar energy total radiation sensor is connected with the second input end of the data collector, and the output end of a battery pack backboard temperature sensor is connected with the third input end of the data collector; the battery pack backboard temperature sensor is embedded on the battery pack backboard of a photovoltaic cell panel array, the output end of the photovoltaic cell panel array is connected with the input end of a combiner box, and the output end of the combiner box is connected with the output end of a direct-current cabinet; the first output end of the direct-current cabinet is connected with the fourth input end of the data collector through a current sensor, the second output end of the direct-current cabinet is connected with the fifth input end of the data collector through a voltage sensor, and the output end of the data collector is connected with an industrial personal computer; and the third output end of the direct-current cabinet is connected with the input end of an inverter, the output end of the inverter is connected with the input end of a transformer, and the output end of the transformer is connected with a transmission-distribution network. The present invention provides a cleaning period optimization method.

Description

technical field [0001] The invention relates to the technical field of solar photovoltaic power generation, and relates to a system for monitoring the ash accumulation state of a photovoltaic panel and a cleaning cycle optimization method. Background technique [0002] Northwest my country, North China and Northeast China, commonly known as the "Three Norths" are rich in solar energy resources and high radiation intensity, and large-scale centralized photovoltaic power plants have developed rapidly. However, these areas are also typical areas with a lot of wind and sand, a lot of dust, and water shortages. After a long period of operation, dust covers the surface of photovoltaic panels and forms ash accumulation. Dust accumulation has brought multiple hazards to the operation of photovoltaic power plants. First, it leads to a decrease in the light transmittance of the panel, a decrease in the photoelectric conversion efficiency, referred to as efficiency, and a decrease in p...

AI Technical Summary

Problems solved by technology

And due to the influence of regional environment and weather conditions, different research results are quite different, which has little guiding significance for engineering applications

Second, there is a lack of operable analysis and optimization models for dust accumulation costs and cleaning costs

The impact of the cleaning cycle on the operation and maintenance economy of photovoltaic power plants is: if the cleaning frequency is high (that is, the cleaning interval is small), the dust accumulation is less, and the power loss caused by the dust accumulation of photovoltaic panels is small, but the cleaning and maintenance costs are high. The economic benefits of equipment operation are poor; if the cleaning frequency is low (that is, the cleaning interval is large), the cleaning and maintenance costs are low, but the dust accumulation is serious, and the power loss caused by the dust accumulation of photovoltaic panels is high, and the economic benefits of photovoltaic power plant operation are poor

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