分布式电源对于配电网谐波特性的影响

摘要

This paper focuses on the analysis of harmonic characteristics generated by power electronic device in distribution system. A distribution network model is designed in Matlab, and detail simulation of three phase inverter results on the harmonic characteristics in distribution network are provided in several typical access patterns. Based on these analysis, this paper concludes the harmonic components spread principles in the distribution system, and analyzes the influence on the distribution network. The results show that after the distributed generation accesses to distribution network, higher harmonic current is greatly affected by the impedance between the distributed generation and the point of common coupling.%为研究分布式系统中电力电子装置对配电网谐波特性的影响,建立了基于Matlab的配电网模型,研究了几种典型接入方式下三相逆变器对配电网的谐波特性影响的仿真计算.在此基础上总结出了分布式系统中电力电子装置产生的谐波在配电网中传播的机理,并分析了其对配电网谐波特性的影响.研究结果表明:在分布式电源接入配电网后,高次谐波电流受分布式电源与配电网接入大电网的公共连接点之间阻抗的影响很大.