准谐振控制器在有源电力滤波器中的应用  

Application of Quasi Resonant Controller for Active Power Filter

作　　者：杨秋霞 梁雄国[1] 郭小强[1] 赵清林[1] 

机构地区：[1]燕山大学电气工程学院电力电子节能与传动控制河北省重点实验室,秦皇岛066004

出　　处：《电工技术学报》2009年第7期171-176,共6页Transactions of China Electrotechnical Society

基　　金：河北省自然科学基金(E2008000801);河北省教育厅(2006444)资助项目

摘　　要：在有源电力滤波器dq坐标系数学模型的基础上,着重分析了基于电流内环解耦的PI控制。由于PI控制器在跟踪交流信号时存在静差,本文对其进行改进并提出了PI并联谐振环节的补偿电流跟踪控制策略。理想的谐振控制器在谐振频率处增益无穷大,可以使与谐振频率具有相同频率的正弦信号实现零稳态误差控制。因此,可以在PI控制的基础上并联谐振控制器,对特定次谐波进行重点补偿,进一步改善单独采用PI控制存在的不足。This paper introduces the active power filter model of rotating d-q reference frame. PI controller is analyzed based on this model carefully. The active power filter reference current is far from DC signal, so the PI controller can＇t obtain zero steady-state error. In this paper, a current control method based on PI and resonant controller is proposed. Resonant controller can obtain zero steady-state error for sinusoidal inputs with the same frequency as its resonant frequency. So, proposed current control scheme can compensate specified harmonics with zero steady-state error. Harmonics compensation performance can be improved for the active power filter.

关 键 词：谐波抑制 PI控制 谐振控制 选择性谐波补偿 零稳态误差 

分 类 号：TM713.8[电气工程—电力系统及自动化]