Research on discretization PI control technology of Single-phase Grid-connected Inverter with LCL filter
Compared with L-type filter,LCL-type filter is more suitable for high-power low-switching frequency applications with reducing the inductance, improving dynamic performance.However, the parameter design for the LCL filter is more complex due to the influence to the controller response performance of the converter, if the harmonic current around switching frequency can be fully suppressed, it is possible for inverter to de-crease the total inductance as well as the size and the cost.In this paper, the model of the LCL filter is analyzed and numerical algorithms are adopted to analyze the stability of the closed-loop control system and stable regions are deduced with different parameters of LCL filter.Then, the minimum sampling frequencies are deduced with different conditions.Simulation and experimental results are provided to validate the research on the generating mechanism for the unstable region of sampling frequency.
Converter LCL filter unstable region
Jianke Li Jinquan Wang Ye Xu Pengfei Hou
College of Defense Engineering,PLA University of Science and Technology,Nanjing,210007,China
国内会议
广州
英文
479-491
2015-05-01（万方平台首次上网日期，不代表论文的发表时间）