基于逆系统方法有源滤波器控制策略的研究  

Research on Control of Active Power Filter using Inverse System Method

作　　者：刘国海[1] 黄重月[1] 韩雪冰[1] 

机构地区：[1]江苏大学,江苏镇江212013

出　　处：《电力电子技术》2009年第3期1-3,共3页Power Electronics

基　　金：江苏省高新技术基金项目(GB2004024);江苏大学高级人才专项基金项目(07JDG072);江苏省镇江市攻关项目(GY2005006)~~

摘　　要：有源电力滤波器(Active Power Filter,简称APF)是解决电网谐波问题的有效手段,其补偿性能取决于谐波电流检测方法和电流跟踪控制方法。提出了一种基于逆系统方法的APF反馈线性化控制方法。针对APF主电路在d,q旋转坐标系下数学模型的非线性特性,采用逆系统方法将其解耦为伪线性系统,并在该伪线性系统的基础上利用线性二次性调节器(Linear Quadratic Regulator,简称LQR)设计了满足一定性能指标的控制器。在这种控制策略中,指令电流通过基于瞬时无功功率理论的ip-iq检测方法得到。仿真和实验结果显示,实际补偿电流能够快速准确地跟踪指令电流,使电网电流快速被补偿为正弦波,且直流侧电压也能很快达到稳定值,证实了该控制方法的可行性。Active power filter（APF） is an effective means to eliminate current harmonics.Its compensation performance depends on harmonic current detection and current track-control methods.A linear feedback approach based on inverse system method is presented.Aiming at the nonlinear identity of the mathematic model of the active power filter in d,q synchronous reference frame,a pseudo-linear model is given based on the inverse system method.Finally a linear quadratic regulator is designed to meet some performance index in terms of the pseudo-linear system.In this control scheme, reference current is gained by using the ip-iq harmonics detecting method which is based on the instantaneous reactive power theory.The simulation shows that the compensation current follows the harmonics reference signal fast and precisely,and the DC voltage also reaches the fixed value quickly,which validates the control strategy is viable.

关 键 词：滤波器 控制 数学模型/瞬时无功功率理论 

分 类 号：TN713[电子电信—电路与系统]