电力系统保护与控制2026，Vol.54Issue(16)：107-119,13.DOI:10.19783/j.cnki.pspc.260032
基于导纳无源性的异构并联逆变系统参数配置方法
Parameter configuration method for heterogeneous parallel inverter systems based on admittance passivity
摘要
Abstract
In paralleled inverter systems,the non-passive region where the synthesized admittance exceeds the±90° passivity boundary is one of the key causes of instability in grid-connected operation under weak grid conditions.To address this issue,a heterogeneous inverter parameter configuration method based on admittance optimization is proposed.By appropriately configuring the sampling frequency and LCL filter parameters of newly added inverters,the non-passive regions of the synthesized admittance can be eliminated,thereby enhancing the passivity-based stability of the system without modifying the control structure and parameters of existing inverters.First,based on the Norton equivalent model of parallel inverter systems,stability criteria for the grid-connected current and the coupling current between inverters are established.The grid-connected phase margin and coupling phase margin are defined to reveal the relationship between the violation of the±90° passivity boundary of synthesized admittance and harmonic resonances among multiple inverters.Then,by combining the resonant and anti-resonant characteristics of the LCL filter with the admittance synthesis rule,coordinated design guidelines for the sampling frequency and filter parameters of heterogeneous inverters are derived.A feasible sampling frequency range for newly added inverters is obtained to ensure that the synthesized admittance satisfies passivity requirements over the entire frequency range.Finally,the effectiveness of the proposed method is verified on an experimental platform consisting of two three-phase grid-connected inverters,each rated at 13.2 kW.关键词
并联逆变器/异构逆变器/弱电网/无源性/导纳合成规则Key words
paralleled inverters/heterogeneous inverters/weak grid/passivity/admittance synthesis rule引用本文复制引用
孙成,罗文华,陈智勇,刘子俊,胡仁祥,常喜强..基于导纳无源性的异构并联逆变系统参数配置方法[J].电力系统保护与控制,2026,54(16):107-119,13.基金项目
This work is supported by the Major Science and Technology Project of Xinjiang Uygur Autonomous Region(No.2022A01004). 新疆维吾尔自治区重大科技专项资助(2022A01004) （No.2022A01004）
湖南省自然科学基金优秀青年项目资助(2021JJ20040) （2021JJ20040）
湖南省研究生科研创新项目资助(CX20250981) （CX20250981）
电能高效高质转化全国重点实验室开放基金资助(2025KF013) （2025KF013）
