基于模态分析的多逆变器系统串并联谐振特性分析  

Series-parallel Resonance Analysis of Multi-inverter System Based on Modal Analysis

作　　者：李强[1] 孙鹏菊[1] 董光德 陈咏涛 LI Qiang;SUN Pengju;DONG Guangde;CHEN Yongtao(State Key Laboratory of Power Transmission Equipment Technology(Chongqing University),Shapingba District,Chongqing 400044,China;State Grid Chongqing Electric Power Research Institute,Yubei District,Chongqing 401121,China)

机构地区：[1]输变电装备技术全国重点实验室(重庆大学),重庆市沙坪坝区400044 [2]国网重庆市电力公司电力科学研究院,重庆市渝北区401121

出　　处：《中国电机工程学报》2024年第13期5269-5280,I0021,共13页Proceedings of the CSEE

基　　金：国网重庆市电力公司科技项目“电网宽频振荡风险评估及防治措施研究服务”(SGCQDK00DPJS2200300)。

摘　　要：基于模态分析的多逆变器系统谐振分析方法能够获得系统准确的谐振定位,但在谐振类型辨识方面存在不足。该文提出一种基于模态分析方法和参与因子计算的多逆变器系统谐振辨识方法。考虑线路阻抗,建立计及电容电流有源阻尼的逆变器诺顿等效模型。当逆变器组合变化时,对比串、并联谐振模态分析结果的差异。通过对系统谐振类型的划分,获取不同类型谐振的特征信息。针对不同类型谐振选择特定的模态分析方法,借助参与因子表现实现谐振类型辨识。最后,搭建仿真电路模型和实验平台,通过仿真和实验验证所得结论的正确性。The resonance analysis method based on modal analysis can obtain accurate resonance positioning of a multi-inverter system,but it has shortcomings in the identification of resonance types.In this paper,a resonance identification method based on modal analysis and participation factor calculation is proposed for multi-inverter systems.A Norton equivalent model of the inverter with active damping of the capacitance current is established and the line impedance is considered.The result difference between series and parallel resonance modal analysis is analyzed when the inverter combination changes.The characteristics of different types of resonances are obtained by classifying the resonance types.A specific modal analysis method is selected for each type of resonance,and the type of resonance is identified by the performance of the participation factor.Finally,a simulation circuit model and an experimental platform are built to verify the correctness of the conclusions.

关 键 词：多逆变器 串并联谐振 模态分析 谐振类型 谐振辨识 

分 类 号：TM46[电气工程—电器]