中国电机工程学报2016，Vol.36Issue(21)：5890-5898,9.DOI:10.13334/j.0258-8013.pcsee.152540
基于谐波线性化的三相LCL型并网逆变器正负序阻抗建模分析
Analysis of Positive-sequence and Negative-sequence Impedance Modeling of Three-phase LCL-type Grid-connected Inverters Based on Harmonic Linearization
摘要
Abstract
In a distributed generation system, the stability of grid-connected inverters that are used as the dominant power interface device is directly related to the reliable operation of the grid-connected system. The impedance-based analysis method can be employed to effectively study the interaction stability between grid-connected inverters and grids, so the impedance modeling of grid-connected inverters is the important premise for the analysis of impedance stability. Based on the application of three-phase LCL-type grid-connected inverters, the harmonic linearization method was adopted to analyze the frequency characteristic of the phase-locked loop (PLL), and a parameter design approach of PLL regulator was proposed in this paper. Meanwhile, the impacts of the factors that include PLL and digital control delay on the impedance characteristic were considered, and the positive-sequence and negative-sequence impedance models of the three-phase LCL-type grid-connected inverter was built by combining harmonic linearization and symmetrical component methods. Finally, the frequency characteristic of PLL and the output impedance model of the three-phase LCL-type grid-connected inverter were verified respectively by the simulation and experimental results, which effectively proved the correctness of the theoretical analysis.关键词
并网逆变器/锁相环/谐波线性化/阻抗稳定性Key words
grid-connected inverter/phase-locked loop/harmonic linearization/impedance stability分类
信息技术与安全科学引用本文复制引用
王赟程,陈新,陈杰,龚春英..基于谐波线性化的三相LCL型并网逆变器正负序阻抗建模分析[J].中国电机工程学报,2016,36(21):5890-5898,9.基金项目
国家863高技术基金项目(SS2014AA052002)；国家电网公司专项科技项目(NYB17201500218)；江苏省研究生培养创新工程(KYLX_0268)。The National High Technology Research and Development of China 863 Program (2014AA052002) （SS2014AA052002）
The Science and Technology Project of State Grid Corporation (NYB17201500218) （NYB17201500218）
Funding of Jiangsu Innovation Program for Graduate Education (KYLX_0268) （KYLX_0268）
