弱电网下多并网逆变器谐振失稳研究综述
摘要：并网逆变器引入的谐振问题将直接影响并网电流质量和系统的稳定运行。该文从并网逆变器系统稳定性分析方法、稳定性影响因素和谐振分析方法三方面进行综述。首先介绍了并网逆变器拓扑和控制方法。其次，对比了状态空间法和阻抗分析法在并网逆变器系统稳定性分析中的应用，研究了并网逆变器输出阻抗建模方法。然后，分析了电网阻抗、逆变器参数、锁相环、逆变器并联数量等因素对并网逆变器系统稳定性的影响。最后，采用传统频域分析法和模态分析法分别分析了多并网逆变器系统的谐振失稳机理，探索了模态分析法在多并网逆变器系统谐振分析中的优势及应用前景。
Abstract:The resonance problem caused by the grid-connected inverter's integration would directly affect the grid current quality and the system stability. This paper comprehensively reviews the resonance instability of multiple grid-connected inverters in the weak grid, including stability analysis methods, stability influence factors and resonance analysis methods. First, the topology and control strategy of grid-connected inverters are introduced. Second, the applications of the state-space method and the impedance analysis method in stability analysis of system with grid-connected inverters are compared, and the output impedance modeling of grid-connected inverter system is investigated. Then, the influences of grid impedance, inverter parameters, phase-locked loop and the number of parallel inverters on the stability of grid-connected inverter system are analyzed. Finally, the traditional frequency domain analysis method and the modal analysis method are applied to analyze the resonance instability mechanism of multiple grid-connected inverter system. The advantages and application prospects of the modal analysis method in resonance analysis are explored.
标题：弱电网下多并网逆变器谐振失稳研究综述
英文标题：An Overview on Resonance Instability of Multiple Grid-connected Inverters in Weak Grid
作者：李建文, 阮筱菲, 李永刚, 纪烨晴, 孙伟,
关键词：并网逆变器, 弱电网, 谐振, 稳定性, 阻抗分析法, 模态分析,
发表日期：2020-04-01
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