基于逆变器阻抗重塑的微电网电能质量控制
Power Quality Control Based on Inverter Impedance Reshaping for Microgrids
赵吉康 1姜涛 1王佳峰 1刘新斌1
作者信息
- 1. 国网浙江省电力有限公司长兴县供电公司,浙江 长兴 313100
- 折叠
摘要
当非线性负荷接入孤岛微电网中多逆变器并联系统时,由于不同逆变器的容量差异和线路阻抗差异,导致谐波电流不能均分.针对此问题,可通过改变逆变器等效谐波阻抗,使其与线路阻抗相匹配,实现谐波电流均分.为此,提出一种基于逆变器阻抗重塑的孤岛微电网谐波电流均分方法,将逆变器等效谐波阻抗自适应重塑为阻感性,以实现谐波电流在多逆变器间的均分.最后,通过实验验证了所提方法的可行性.
Abstract
When nonlinear loads are connected to a multi-inverter parallel system in an islanded microgrid,the har-monic currents can not be equalized due to the difference in capacity of different inverters and the difference in line impedance.To address this,harmonic current equalization can be achieved by changing the inverter equivalent harmo-nic impedance to match the line impedance.For this reason,a harmonic current equalization method is proposed based on inverter impedance reshaping for isolated microgrids,which adaptively reshapes the inverter equivalent harmonic impedance into resistive-inductive to achieve harmonic current equalization among multiple inverters.Finally,the feasi-bility of the proposed method is verified by experiments.
关键词
逆变器/非线性负荷/孤岛微电网/谐波电流均分Key words
inverter/nonlinear load/islanded microgrid/harmonic current equalization引用本文复制引用
出版年
2025
NETL
NSTL
万方数据