分布式电源不同接入点对配电网谐波特性的影响

摘要

逆变型分布式电源( Distributed Generation,DG)通过电力电子装置并网,其接入位置的不同将给电网谐波特性带来多方面影响。以在配电网中引入谐波电流最少为目的,先将DG进行谐波源等效,再依据最优点选取原则,利用Matlab中提供的电力系统模块在Simulink环境下搭建仿真模型,通过类比分析,归纳DG在不同接入点对配电网谐波分布特性影响,为后续进一步提出改善方案提供依据。%Inverter interfaced distributed generation connect the distribution network through power electronic devices,the difference of access points brings out multifaceted impacts on harmonic in distributed network. To minimize the harmonic current in power distribution network,this paper first makes DG equivalent in harmonic source,then builds simulation model in Simulink through power system blockset provided by Matlab on the principle of optimum point selecting,and includes harmonic distribution characteristics when DG access differ-ent point in distribution network by analogy analysis,and provide the basis for further improvement scheme to eliminate harmonic.