董丙伟,薛花,胡英俊,任春雷,王育飞.基于电力弹簧的可再生能源供电系统电压平稳控制方法[J].电测与仪表,2020,57(10):100-107. Dong Bingwei,Xue Hua,Hu Yingjun,Ren chunlei,Wang Yufei.Voltage stabilization control method of renewable energy power supply system based on electric spring[J].Electrical Measurement & Instrumentation,2020,57(10):100-107.
基于电力弹簧的可再生能源供电系统电压平稳控制方法
Voltage stabilization control method of renewable energy power supply system based on electric spring
In order to improve the power quality of critical load(CL) and ensure the safe and stable operation of ES, a non-linear control method based on flatness-based control(FBC) is proposed to solve the problems of multivariable and strong non-linearity of electric spring(ES) system and narrow stability region and weak robustness of traditional linear PI control. Firstly, the dynamic mathematical model of three-phase ES (TPES) is established and the reference value of the voltage injected by TPES to stabilize CL voltage is calculated; then, the differential smoothing theory is introduced to verify that the TPES system is a differential smoothing system, and a differential smoothing non-linear controller based on TPES is designed to achieve high power quality of CL and safe and stable operation of TPES. Finally, the simulation results based on MATLAB/simulink show that the proposed differential smoothing nonlinear control method has the characteristics of fast dynamic response, high stability and strong robustness.
