A new method for grid voltage sag stochastic estimation considering the correlation of new energy output is proposed for new energy power systems including wind power, photovoltaic and electric vehicle charging stations. Firstly, a stochastic model of fault information and a stochastic model of new energy output are constructed. After using the Pearson correlation analysis method to determine the correlation coefficient of the same type of new energy output, a series of sag events are obtained through fault simulation, and the voltage dips of each node are calculated. Indicators, estimate the voltage sag of each node[1-4].

Yan Chuang, Bai jing. Research on grid voltage sag based on distributed power generation. Academic Journal of Engineering and Technology Science (2019) Vol. 2 Issue 5: 84-89. https://doi.org/10.25236/AJETS.2019.020510.

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