摘要
提出一种应用于VIENNA整流器的频率自适应快速重复控制方法。通过基波频率下的坐标变换,VIENNA整流器的6k±1次谐波转化为6k次交流分量,该方法根据交流分量设计内模部分的谐振频率,其分数延时部分使用拉格朗日插值多项式代替,有效的提高了电流内环的动态响应速度。当电网频率波动时,通过在线调整重复控制器内模的谐振频率,使谐振频率跟随谐波频率的实际值,从而使VIENNA整流器在电网频率波动时获得更高的电流质量。仿真结果表明所提控制策略的有效性和可行性。
A frequency adaptive fast repetitive control method for VIENNA rectifier is presented.Through the coordinate transformation of fundamental wave,the 6k±1st harmonic of VIENNA rectifier is converted into 6k ac component.This method designs the resonant frequency of the internal mode part according to the ac component,and the fractional delay part is replaced by Lagrange interpolation polynomial,which effectively improves the dynamic response speed of the current inner ring.When the power grid frequency fluctuates,the resonant frequency of the internal mode of the repetitive controller is adjusted online to make the resonant frequency follow the actual value of harmonic frequency,so that the VIENNA rectifier can obtain higher current quality when the power grid frequency fluctuates.Simulation results show that the proposed control strategy is effective and feasible.
作者
王素娥
缑杨科
郝鹏飞
燕晨阳
WANG Su’e;GOU Yangke;HAO Pengfei;YAN Chenyang(School of Electrical and Control Engineering,Shaanxi University of Science and Technology,Xi’an Shaanxi 710021,China)
出处
《电子器件》
CAS
北大核心
2020年第6期1266-1272,共7页
Chinese Journal of Electron Devices
基金
陕西省技术创新引导专项项目(2018XNCG-G-12)
陕西科技大学项目(19Y046)。
