统一电能质量调节器的变结构控制研究  

Variable Structure Control Research on Unified Power Quality Conditioner

作　　者：鲍鹏[1] 王奔[1] 黄崇鑫[1] 李泰[1] 

机构地区：[1]西南交通大学电气学院,成都610031

出　　处：《电测与仪表》2009年第1期16-20,共5页Electrical Measurement & Instrumentation

摘　　要：统一电能质量调节器(UPQC)是串联有源电力滤波器和并联有源电力滤波器的结合,集成了二者的优点,可以同时补偿电压谐波和电流谐波。控制是统一电能质量调节器的核心,控制结果要求负载电压为正弦电压,电网输入电流为正弦电流。提出一种新的控制方法,对UPQC串联侧和并联侧同时进行参考值计算和开关器件控制,使电压补偿和电流补偿同步协调工作。考虑到UPQC的数学模型在dq坐标系下,是一个非线性耦合系统,首先采用逆系统方法将原系统线性化解耦,构造出伪线性系统。然后,再运用变结构控制理论,设计出这个伪线性系统的变结构控制律。最后,建立了UPQC的MATLAB仿真模型对其进行仿真验证。结果表明该方法的有效性和可行性。Unified power quality conditioner （UPQC） integrates the advantages of parallel active power filter and series active power filter, and it can compensate current harmonics and voltage harmonics. Control, which is the core of UPQC,is desired to make the load voltage sinusoidal and keep the input line current in the normal value. This paper presents a novel Control Algorithm. The proposed algorithm treats the series inverter and the parallel inverter of UPQC and the reference values of both parts are simultaneously computed. Considering that UPQC is a coupling nonlinear system in synchronous rotating dq coordinate system, firstly the original system model of UPQC is linearized and deeoupled to be a pseudo-linear system which is made up of original system and inverse system. Then adopts Variable Structure Control Theory （VSC） to the pseudo-linear system, i.e. the variable structure control laws of this pseudo-linear system to control the system of UPQC are designed. Finally, through building the system of UPQC and making simulations under the support of MATLAB soft, the simulation results verify the viability and effectiveness of the control algorithm.

关 键 词：统一电能质量控制器 有源电力滤波器 谐波 dq标系 非线性耦合系统 逆系统 伪线性系统 变结构控制 

分 类 号：TM76[电气工程—电力系统及自动化]