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 

机构地区：[1]IEEE [2]College of New Energy,China University of Petroleum(East China) [3]college of Electrical and Electronic Engineering,Huazhong University of Science and Technology

出　　处：《Journal of Modern Power Systems and Clean Energy》2021年第6期1327-1338,共12页现代电力系统与清洁能源学报（英文）

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)。

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.

关 键 词：Grid-connected converter linear active disturbance rejection control(LADRC) sub-and super-synchronous oscillation STABILITY 

分 类 号：TM46[电气工程—电器]