Analysis on harmonic interaction and stability of LCL grid-connected inverter based on harmonic state space theory

被引：0
|
作者：
Lin S. [1 ]
Dai Y. [1 ]
Yan X. [2 ]
Li D. [1 ]
Fu Y. [1 ]
机构：
[1] College of Electrical Engineering, Shanghai University of Electric Power, Shanghai
[2] State Grid Shanghai North Power Supply Company, Shanghai
来源：
Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2022年 / 42卷 / 06期
基金：
中国国家自然科学基金;
关键词：
Grid impedance; Grid-connected inverter; Harmonic interaction; Harmonic state space; Stability analysis; Weak grid;
D O I：
10.16081/j.epae.202203015
中图分类号：
学科分类号：
摘要：
The electronization of power grid causes harmonic resonance and system instability. In order to obtain the detailed harmonic interaction and instability mode of the system, the mathematical model of three-phase LCL grid-connected inverter under dual current loop control is established based on HSS(Harmonic State Space) theory firstly. Secondly, the influence of grid background harmonic voltage at PCC(Point of Common Coupling) on DC voltage and AC current of the inverter, and the influence of DC voltage disturbance on AC side are deeply studied. At the same time, the coupling coefficient matrix of harmonic interaction is derived, and the coupling characteristics are analyzed. Then, the mechanism of inverter harmonic oscillation in weak grid is revealed by impedance analysis method based on HSS mathematical model. Finally, the results of experiment and simulation model are compared with the results of mathematical model to verify the effectiveness of the established mathematical model and the correctness of theoretical analysis conclusion. © 2022, Electric Power Automation Equipment Press. All right reserved.
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页码：76 / 83
页数：7
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