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

作　　者：赵吉康 姜涛 王佳峰 刘新斌 ZHAO Ji-kang;JIANG Tao;WANG Jia-feng;LIU Xin-bin(State Grid Zhejiang Changxing County Power Supply Co.,Ltd.,Changxing 313100,China)

机构地区：[1]国网浙江省电力有限公司长兴县供电公司,浙江长兴313100

出　　处：《电力电子技术》2025年第1期90-94,共5页Power Electronics

基　　金：国网浙江省电力有限公司科技项目(HZJTKJ2022-20)。

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。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 

分 类 号：TM464[电气工程—电器]