Voltage Influence Analysis of Photovoltaic Grid Connection under Ring Network Structure

Large-scale grid-connected photovoltaic power supply will impact the operation of the grid, resulting in voltage fluctuations, at the same time, harmonic injection will affect the distribution of harmonic voltage in the system. Based on the theoretical analysis and demonstration of the voltage deviation caused by the photovoltaic power supply connecting to the feeder of 10kV distribution network and the influence of the total harmonic distortion rate THDu.