Analysis of Voltage Fluctuations in Distribution Networks Under Photovoltaic and Electric Vehicle Integration

Given the volatility of photovoltaic output and the adverse impact of large-scale, uncoordinated integration of electric vehicles on distribution networks, this paper investigated voltage fluctuations resulting from distributed photovoltaic and electric vehicle integration. Firstly, a distributed photovoltaic model was established using MATLAB/Simulink, and three electric vehicle charging loads were predicted. Secondly, simulation calculations were used to analyze voltage fluctuations in distribution networks from three perspectives: photovoltaic power fluctuations, integration location, and ordered/unordered electric vehicle charging. Results show that configuring energy storage systems to stabilize photovoltaic output, combined with controlling electric vehicle charging through time-of-use pricing and other measures, can effectively suppress voltage fluctuations and prevent node voltage from exceeding limits.