doi:10.16186/j.cnki.1673-9787.2020010040

Received:2020/01/12

Revised:2020/05/15

Published:2021/05/15

Study on the electric spring based on repetitive control

ZHENG Zheng, ZHANG Xi, ZHANG Tao, WANG Yongshuai, GAO Weixing

School of Electrical Engineering & Automation， Henan Polytechnic University， Jiaozuo 454000 ， Henan， China

Abstract:Under the background of vigorously promoting of new energy， micro grid technology is developed continuously. Due to the unpredictability of new energy， the dynamic and static characteristics of distributed power supply， and the use of a large number of power electronic devices， a series of power quality parameters such as voltage and frequency in micro grid are obviously disturbed. In order to solve these problems， the design and research of electric spring （ ES） controller has become a hot topic. Aiming at the shortcomings of the resonance control strategy of ES， an improved control strategy combining proportional-resonant control with repetitive control was put forward. The quasi-proportional resonant controller could track the fundamental sinusoidal signal without static error， and the repetitive controller could suppress the low order harmonics as the harmonic compensator and reduce the total harmonic distortion rate of the system. In addition， the design principle of repetitive controller was analyzed in detail and the MATLAB simulation model was established. The results showed that the improved control structure had good dynamic performance， higher steady-state accuracy， and the system control algorithm was simplified while realizing the stronger anti-harmonic interference ability.

Key words:electric spring;phase control algorithm;quasi-proportional resonance controller;repetitive controller

 基于重复控制的电力弹簧研究_郑征.pdf