Parallel Resonance Mechanism Analysis and Suppression Method for LCL Type Grid-Connected Inverter

被引：0
|
作者：
Tao H. [1 ]
Zhou Y. [1 ]
Zhang G. [1 ]
Zheng Z. [1 ]
机构：
[1] School of Electrical Engineering and Automation, Henan Polytechnic University, Jiaozuo
来源：
Shanghai Jiaotong Daxue Xuebao/Journal of Shanghai Jiaotong University | 2020年 / 54卷 / 10期
关键词：
Different capacity; Digital notch filter; Parallel connection of multiple inverters; Resonance;
D O I：
10.16183/j.cnki.jsjtu.2019.046
中图分类号：
学科分类号：
摘要：
For the parallel system of two grid-connected inverters, the effect of each inverter on the grid-connected current is analyzed by using the superposition theorem, and the grid-connected current is decomposed. Besides, the mechanism of resonance generated by the interaction current and the common current is studied, and the resonance frequency point characteristics of parallel systems with multiple grid-connected inverters of the same and different capacities are compared and analyzed. Moreover, based on the resonant frequency point generated by the interactive current in the parallel system, a digital notch filter is designed and introduced into the traditional capacitive current feedback active damping control to realize the static-free control of the fundamental signal, which meets grid-connected requirements of such systems. Furthermore, the models of parallel systems of inverters with the same and different capacities are built. The simulation results verify the correctness and effectiveness of the proposed strategy. © 2020, Shanghai Jiao Tong University Press. All right reserved.
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页码：1065 / 1073
页数：8
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