Irradiation characteristic meteorological scene-based photovoltaic power generation acceptance capability evaluation method

Abstract

The invention relates to an irradiation characteristic meteorological scene-based photovoltaic power generation acceptance capability evaluation method. The method includes the following steps that: S1, data acquisition is performed; S2, a stochastic differential equation is utilized to generate a plurality of non-independent normal distribution time sequences including correlations between different light regions and the autocorrelation of each light region; S3, solar radiation intensity under different clear sky indexes is calculated according to the probability model of the clear sky indexes; S4, the data obtained in steps S2 and S3 are sampled separately, so that the time sequence of the solar radiation intensity in the different light regions is obtained; S5, the output of photovoltaic power stations in each light region is calculated according to the output formulas of different types of photovoltaic arrays; and S6, the above steps are repeated until the number m of the times ofsimulation is equal to a given number M of times, the average value of the calculation results of the number M of times is obtained, and a set of photovoltaic power station output calculation resultshaving the smallest difference from the average value is selected as a final simulation result, and is outputted. With the method of the invention adopted, the problem of grid operation uncertainty under large-scale new energy grid connection can be solved, and the operation capability and effect of a power grid can be improved.

Description

technical field [0001] The invention relates to the technical field of electric power operation, in particular to a method for evaluating photovoltaic power generation acceptance capacity based on meteorological scenes with radiation characteristics. Background technique [0002] With the rapid development of new energy in my country, the randomness and intermittent nature of new energy output have brought a greater impact on the operation and planning of the power system. Due to the randomness, volatility and uncertainty of new energy output, large-scale new energy power generation grid connection will have a significant impact on the power output structure, operating form, energy saving and economical aspects of the power system: [0003] 1) When large-scale new energy is connected to the grid, the system has uncertainties not only on the load side, but also on the power generation side. Therefore, it is necessary to reserve more reserves to cope with the uncertainty of n...

AI Technical Summary

Problems solved by technology

[0009] The present invention provides a photovoltaic power generation acceptance capacity evaluation method based on the meteorological scene of irradiation characteristics, which is used to solve the problem of grid operation uncertainty under large-scale new energy grid connection, improve the grid operation capacity, improve grid operation, and planning effects, thereby alleviating The current problem of insufficient consumption of new energy plays an important role in promoting the development of renewable energy in China and the implementation of energy conservation, emission reduction and low-carbon development strategies

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