中国电机工程学报2012，Vol.32Issue(6)：113-120,8.
四桥臂有源滤波器在静止坐标系下的改进PR控制
An Improved Proportional Resonant Control Strategy in the Static Coordinate for Four-leg Active Power Filters
摘要
Abstract
The current loop control of active power filters（APF） requires the compensation current to track the given signal without any error,while it is difficult to eliminate steady-state errors by using the traditional PI controller in the synchronous dq frame.In this paper,the proportion resonant（PR） controller was adopted to track the different frequency component,thus to obtain zero steady-state errors.As to the grid frequency fluctuation and the unbalanced problem of three-phase systems,the improved controller in the coordinate was proposed.On the basis of analyzing the effects of PR controller parameters on the performance index,the paper summarized the debugging methods of the parameters.And the Pre-Warped Tustin Transformation was used to discretize the controllers.The proposed strategy was verified through simulation and experiment results.The total harmonic distortion（THD） values of grid currents after filtering reduced and the root mean square value of the neutral current dropped.In addition,the compensating effects was still satisfying while load and frequency were fluctuating.The results suggest that the proposed improved PR control strategy can effectively restrain harmonics and solve the unbalanced problem of three-phase systems.Moreover,this method has excellent adaptability for the load and frequency fluctuation.关键词
四桥臂有源滤波器/比例谐振控制/三相四线制/频率波动Key words
four-leg active power filter（APF）/proportional resonant（PR） control/three-phase four wire system/frequency fluctuation分类
信息技术与安全科学引用本文复制引用
周娟,张勇,耿乙文,伍小杰..四桥臂有源滤波器在静止坐标系下的改进PR控制[J].中国电机工程学报,2012,32(6):113-120,8.基金项目
国家自然科学基金项目(51077124) （51077124）
