含高渗透率分布式光伏的配电网电压越限解决方法研究综述

A Review of Solutions for Voltage Beyond Limits in Distribution Networks With High Penetration Distributed Photovoltaics

近年来,随着我国能源转型的不断深入、光伏发电技术的逐渐成熟以及发电成本的逐步降低,分布式光伏在配电网中的占比日益提高,配电网的电能质量问题愈发显著,如电压越限、电压不平衡、线路过载、闪变以及谐波超标等问题,其中,电压越限是限制分布式光伏接入容量的主要因素。该文首先总结了目前常用的含高渗透率分布式光伏的配电网电压调节方法,在此基础上,分别对每种电压调节方法进行了详细介绍。最后,对比分析了各种电压调节方法的优劣性,并对未来含高渗透率分布式光伏的配电网电压调节方法提出相关建议。

In recent years,as China's energy transition has deepened and photovoltaics(PV)power generation technology has gradually matured while the cost of power generation has decreased,the proportion of distributed PV in the distribution network is increasing.Consequently,the power quality issues in the distribution network are becoming increasingly significant,such as voltage beyond limits,voltage unbalance,line overload,flicker and harmonic overload,etc.Among them,the main constraint on the capacity of distributed PV access is voltage exceeding limits.In this paper we firstly provide an overview of the commonly employed voltage regulation methods for for distributed PV systems with high penetration levels,followed by a detailed exposition of each method.Finally,a comparison and analysis of the advantages and disadvantages of various voltage regulation methods areconducted,and relevant suggestions are made for future voltage regulation methods of distribution networks with high-permeability distributed PV.