Calculation method for economic cleaning of dust accumulation in photovoltaic power station

Abstract

The invention discloses an economical cleaning calculation method for ash accumulation in a photovoltaic power station, which selects some components in the photovoltaic power station as components to be cleaned, and includes the following steps: S1, obtaining the theoretical value Q of daily cumulative power generation of the components to be cleaned n and the actual value of daily cumulative power generation Q c ; S7A, determine the rainfall information x according to the weather forecast, and predict the power loss value K after rain according to the rainfall information x; S7B, calculate the pre-rain power loss rate R according to the weather forecast, the current day's power generation loss rate and the average power generation in sunny and cloudy days in the past Y days Estimated power generation loss amount M E ; S7A and S7B are carried out simultaneously or sequentially, if the power loss value K after the rain is greater than M% or the estimated loss amount of power generation before the rain is M E If it is greater than S% of the cleaning cost D, skip to step S8 directly, otherwise return to step S1 for continuous monitoring; S8, clean the components of the photovoltaic power station. The method combines weather forecast information to determine the most economical photovoltaic module cleaning cycle.

Description

technical field [0001] The invention relates to the technical field of solar power generation, in particular to an economical cleaning calculation method for ash accumulation in a photovoltaic power station. Background technique [0002] The power generation of photovoltaic power plants is easily affected by environmental factors such as light conditions and temperature. Photovoltaic modules are operated outdoors all the year round, and the accumulation of dust on the surface of the modules is inevitable. Dust occlusion will greatly reduce the output power of photovoltaic modules, thereby affecting the power generation of photovoltaic power plants. [0003] At the same time, the accumulation of dust will form hot spots on the surface of the module, which will affect the life of the photovoltaic module. Studies have shown that dust accumulation on the surface of photovoltaic modules can cause 3% to 30% loss of power generation. Therefore, detecting the dust on the surface o...

AI Technical Summary

Problems solved by technology

[0005] The disadvantages of these two methods for judging the timing of operation and maintenance cleaning are: (1) the human judgment of the naked eye is relatively random; (2) the cost of cleaning operation and maintenance of the power station is relatively high, and the method of judging the current or power difference after cleaning is adopted It is not accurate enough, there is no comparison basis for power generation loss and cleaning cost, and it does not meet the requirements of fine management of large-scale power plant operation and maintenance; (3) Natural rainfall can also achieve the effect of cleaning photovoltaic modules

If natural rainfall occurs shortly after manual cleaning, it must be a waste of manpower and material resources

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