A Review of Voltage Regulation Methods for Distribution Networks in the Context of High Proportion of Distributed Photovoltaic Integration
With the implementation of the"double carbon"target and the rapid development of China's photovoltaic(PV)power generation industry,the problem of voltage overrun in distribution networks is becoming more and more prominent.This paper conducts a systematic review of distribution network voltage regulation methods in the context of high proportion of distributed photovoltaic(PV)integration,aiming to provide a certain reference for solving the voltage overrun problem in new distribution network.Firstly,the mechanism of the distribution network voltage overrun is systematically summarized in terms of current,harmonics and unbalance.Then the corresponding voltage regulation measures and multi-device cooperative control methods are analyzed and summarized according to the different causes of the voltage overrun.Finally,the various regulation methods are analyzed and summarized in terms of economy and reliability,and the prospect is made for flexible grid-connection,multifunctionality,and cooperative control.