并网逆变器并联运行谐振分析及抑制策略  

Resonance Analysis and Suppression Strategy for Parallel Operation of Grid Connected Inverter

作　　者：尚扬 王永生 魏超 黄海宏[2] SHANG Yang;WANG Yongsheng;WEI Chao;HUANG Haihong(Lu’an Power Supply Company,State Grid Anhui Electric Power Co.,Ltd.,Lu’an 237000,China;School of Electrical Engineering and Automation,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]国网安徽省电力有限公司六安供电公司,安徽六安237000 [2]合肥工业大学电气与自动化工程学院,安徽合肥230009

出　　处：《电器与能效管理技术》2023年第6期18-22,共5页Electrical & Energy Management Technology

基　　金：国家自然科学基金项目(51177037)。

摘　　要：针对采用LCL滤波的多并网逆变器并联工作在弱电网时面临的谐振风险,建立了多逆变器并联系统的数学模型。对多并网逆变器并联系统的谐振进行分析,采用新型并网电流反馈控制策略,优化设计参数,提升逆变器相位裕度和幅值裕度,有效抑制多并网逆变器并联系统谐振问题。最后通过MATLAB/Simulink仿真和试验平台,搭建两台并网逆变器并联运行,结果验证了所提策略的可行性。Aiming at the resonance risk of the parallel operation of multi grid connected inverters with LCL filter in weak pawe grid,the mathematical model of multi inverter parallel system is established.The resonance of multi grid connected inverter parallel system is analyzed.A new grid connected current feedback control strategy is adopted and the design parameters are optimized to improve the inverter phase and amplitude margins.The resonance of multi grid connected inverter parallel system can be effectively suppressed.Finally,two grid connected inverters are built in parallel on MATLAB/Simulink and experimental platform.The simulation and experimental results verify that the proposed strategy can be applied in the multi inverter parallel system.

关 键 词：弱电网 多并网逆变器 电流反馈控制 谐振 

分 类 号：TM46[电气工程—电器]