电器与能效管理技术 ›› 2023, Vol. 0 ›› Issue (6): 18-22.doi: 10.16628/j.cnki.2095-8188.2023.06.003

• 研究与分析 • 上一篇    下一篇

并网逆变器并联运行谐振分析及抑制策略

尚扬1, 王永生1, 魏超1, 黄海宏2   

  1. 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
  • 收稿日期:2022-09-15 出版日期:2023-06-30 发布日期:2023-08-15
  • 作者简介:尚 扬(1991—),男,工程师,主要从事微电网自动控制及电能质量治理研究。|王永生(1970—),男,工程师,主要从事调控运行管理工作。|魏 超(1988—),男,工程师,主要从事智能电网调度控制工作。
  • 基金资助:
    国家自然科学基金项目(51177037)

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

SHANG Yang1, WANG Yongsheng1, WEI Chao1, HUANG Haihong2   

  1. 1. Lu’an Power Supply Company,State Grid Anhui Electric Power Co.,Ltd.,Lu’an 237000,China
    2. School of Electrical Engineering and Automation,Hefei University of Technology,Hefei 230009,China
  • Received:2022-09-15 Online:2023-06-30 Published:2023-08-15

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。

关键词: 弱电网, 多并网逆变器, 电流反馈控制, 谐振

Abstract:

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.

Key words: weak power grid, multi grid connected inverters, current feedback control, resonance

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