动态电压恢复器的变结构控制研究  

Research on Dynamic Voltage Restorer Based on Variable Structure Control Theory

作　　者：张慧洁[1] 王奔[1] 田甜[1] 

机构地区：[1]西南交通大学电气工程学院,成都610031

出　　处：《电测与仪表》2011年第10期42-46,54,共6页Electrical Measurement & Instrumentation

摘　　要：动态电压恢复器(DVR)是解决电网电压跌落的一种经济有效的方案,其控制器性能的好坏直接影响到其补偿效果。为此,本文基于变结构控制采用一种新的控制方法。考虑到DVR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,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策略。最后在理论分析的基础上,通过仿真对上述方法进行了验证。结果验证了该方法的可行性和有效性。The dynamic voltage restorer （DVR） is effectively used in mitigating voltage sags. The controller＇s performances play a key role in DVR with excellent functions. This paper proposes a novel control method according to the theory of variable structure control theory. Considering that DVR is a coupling nonlinear system in synchronous rotating dq coordinate system, firstly, the original system model of DVR is linearized and decoupled to be two pseudo-linear systems. Then adopt variable structure control theory, by which the variable structure control laws of the pseudo-linear systems are designed. At last, simulations are proceeded to verify the controller performance basing on above theory analysis. The simulation results verify the viability and effectiveness of the control algorithm.

关 键 词：动态电压恢复器 电压跌落 变结构控制 逆系统方法 

分 类 号：TM761[电气工程—电力系统及自动化]