Impedance Modeling and Stability Factor Assessment of Grid-connected Converters Based on Linear Active Disturbance Rejection Control

作     者：Hailiang Xu Fei Nie Zhongxing Wang Shinan Wang Jiabing Hu Hailiang Xu;Fei Nie;Zhongxing Wang;Shinan Wang;Jiabing Hu

作者机构：IEEE College of New EnergyChina University of Petroleum(East China) college of Electrical and Electronic EngineeringHuazhong University of Science and Technology 

出 版 物：《Journal of Modern Power Systems and Clean Energy》 (现代电力系统与清洁能源学报（英文）)

年 卷 期：2021年第9卷第6期

页      面：1327-1338页

核心收录：

学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 08[工学] 

基　　金：supported in part by the National Natural Science Foundation of China (No. 52077222) the Fundamental Research Funds for the Central Universities (No. 19CX02016A) 

主　　题：Grid-connected converter linear active disturbance rejection control(LADRC) sub-and super-synchronous oscillation stability 

摘      要：—With the increase of converter-based renewable energy generation connected into the power grid, the interaction between renewable energy and grid impedance has introduced lots of new issues, among which the sub-and super-synchronous oscillation phenomenon makes a big concern. The linear active disturbance rejection control(LADRC) is a potential way to improve the damping characteristics of the grid-connected system, but the key factors and influencing mechanism on system stability are unknown. This paper establishes the equivalent impedance and coupling admittance models of a typical three-phase grid-connected converter. Then, the influence of the key factors such as the bandwidth of the LADRC and grid impedance on the stability and frequency coupling effect is assessed in detail. Finally, the theoretical analysis results are verified by simulations and experiments.