Method for predicting output power of power generation in photovoltaic power station

Abstract

The invention discloses a method for predicting output power of power generation in a photovoltaic power station. The method comprises the following steps: a. acquiring total radiation intensity and ambient temperature of a horizontal plane of the place that the photovoltaic power station is located at in a prediction time period according to numerical value weather forecast, and respectively revising the total radiation intensity and the ambient temperature into effective radiation intensity and effective temperature of a photovoltaic cell; b. obtaining short-circuit current and open-circuit voltage generated by a single photovoltaic cell at the prediction time period according to the short-circuit current generated by the single photovoltaic cell under the standard temperature and standard radiation intensity; c. obtaining an output characteristic curve of the photovoltaic cell according to the short-circuit current and the open-circuit voltage generated by the single photovoltaic cell at the prediction time period obtained in the step b, and calculating maximum output power on the output characteristic curve, so as to acquire optimum output current and optimum output voltage at this time; and d. obtaining the output power of the power generation in the photovoltaic power station according to the total number of series parallel photovoltaic cells of the photovoltaic power station. The method provided by the invention is simple and feasible, and has high accuracy.

Description

technical field [0001] The invention relates to the technical field of photovoltaic power generation, in particular to a method for predicting the output power of photovoltaic power station generation. Background technique [0002] Solar photovoltaic power generation is a form of power generation that uses the photovoltaic effect of solar cells to directly convert solar radiation energy into electrical energy. At this stage, the popularization and application of solar energy is increasingly presenting an ascendant world trend, and the solar energy industry has become one of the new energy industries that are booming in the world. The development and utilization of clean, safe and environmentally friendly solar energy has become a common choice for human society to alleviate the growing energy shortage and a powerful force to control severe environmental pollution. The stable operation of the power grid needs to maintain a certain balance between the supply and demand sides,...

AI Technical Summary

Problems solved by technology

As the weather changes, the output power of photovoltaic power plants changes drastically, which seriously affects the peak regulation of the power grid;

[0004] 2) Grid stability issues

Although foreign countries have carried out related research on solar resource distribution monitoring and photovoltaic power plant power forecasting systems, they are still in their infancy, and there is no mature method for photovoltaic power plant power forecasting systems.

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