有源电力滤波器抗电网频率波动重复控制策略  

Active Power Filter Anti-Grid Frequency Fluctuation Repetitive Control Strategy

作　　者：王素娥[1] 燕晨阳 郝鹏飞[1] WANG Sue;YAN Chenyang;HAO Pengfei(College of Electrical and Information Engineering,Shaanxi University of Science and Technology,Xi’an 710021,China)

机构地区：[1]陕西科技大学电气与信息工程学院

出　　处：《电子器件》2019年第4期832-837,共6页Chinese Journal of Electron Devices

基　　金：国家自然科学基金项目(51577110);陕西省工业科技攻关项目(2015GY038);西安市科技计划项目(2017068CG/RC031(SXKD009))

摘　　要：为提高重复控制器在电网频率波动时的适应能力和降低数字系统的计算负担,采用一种自适应分数阶多速率重复控制策略改善有源电力滤波器的补偿性能。电流内环控制器包含高采样速率比例控制和低采样速率重复控制两个环节。采用基于拉格朗日插值多项式近似分数阶相位滞后环节的方法构建了重复控制器的内模环节,使重复控制器谐振频率跟随电网频率变化。通过实验,将所提控制策略与传统重复控制进行对比,结果表明所提控制策略的可行性。In order to improve the adaptability of the repetitive controller in the grid frequency fluctuation and reduce the computational burden of the digital system,an adaptive fractional-order multi-rate repetitive control strategy is used to improve the compensation performance of the active power filter.The current inner loop controller includes two steps of high sampling rate proportional control and low sampling rate repeat control.The internal model link of the repetitive controller is constructed by using the Lagrangian interpolation polynomial to approximate the fractional phase lag link,so that the resonant frequency of the repetitive controller follows the grid frequency change.Through experiments,the proposed control strategy is compared with the traditional repetitive control.The results show the feasibility of the proposed control strategy.

关 键 词：有源电力滤波器 电网频率波动 自适应分数阶多速率重复控制 拉格朗日插值多项式 

分 类 号：TM46[电气工程—电器]