Method and device for evaluating total radiation variation characteristics of photovoltaic power station

Abstract

The invention provides a method and a device for evaluating total radiation variation characteristics of a photovoltaic power station. The method comprises the following steps: firstly, acquiring meteorological data of the photovoltaic power station, then determining means and standard deviations of total annual radiation on the horizontal plane, a long-time average annual value of total monthly radiation on the horizontal plane, and total monthly radiation on the horizontal surface, and finally evaluating the total radiation variation characteristics of the photovoltaic power station. Spatiotemporal scale convergence of an evaluation result can meet production needs of the power industry, and dynamic evaluation of the total radiation variation characteristics of the photovoltaic power station can be achieved. According to a technical scheme provided by the invention, on the spatial scale, the photovoltaic power station is accurately evaluated, so that an object is more clear; on the time scale, a long-term spatiotemporal change trend of solar energy resources of the power station is reflected, and a technological gap in evaluating long-term change, annual change and abnormal conditions of the solar energy resources is filled.

Description

technical field [0001] The invention relates to the technical field of solar energy utilization, in particular to a method and device for evaluating characteristics of changes in total radiation of a photovoltaic power station. Background technique [0002] Solar energy resources are an important resource endowed by nature to human beings, and the evaluation of solar energy resources is the premise and basis for the development and utilization of solar energy resources. Over the years, meteorologists in my country have carried out a large number of fruitful researches on solar energy resource assessment, mainly reflected in: the solar energy resources in different spatial ranges of the country, provinces, and cities have been evaluated in terms of abundance and stability, and a large number of zoning has been done. , which provides a scientific basis for my country to make full use of solar energy. However, there are still the following problems in the evaluation of the chan...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the disadvantages of the estimation results in the above-mentioned prior art, such as rough time and space scales, inability to meet the production needs of the power industry, and inability to dynamically evaluate the change characteristics of the total radiation of photovoltaic power plants, the present invention provides a method and device for evaluating the change characteristics of total radiation of photovoltaic power plants. First obtain the meteorological data of the photovoltaic power station, and then determine the annual radiation of the total horizontal radiation, the multi-year average of the monthly radiation of the total horizontal radiation and the mean and standard deviation of the monthly radiation of the total horizontal radiation according to the meteorological data, and finally Evaluate the change characteristics of the total radiation of photovoltaic power plants according to the annual radiation of the total horizontal radiation, the multi-year average of the monthly radiation of the total horizontal radiation, and the mean and standard deviation of the total monthly radiation of the horizontal radiation, and the spatio-temporal scale convergence of the evaluation results , which can meet the production needs of the power industry, and can realize the dynamic evaluation of the characteristics of total radiation changes in photovoltaic power plants

Images