改进型TTA在三相四线制SVG中的应用  

Application of Improved TTA in SVG with Three-phase Four-wire Power System

作　　者：卓放[1] 陈波[1] 饶云堂[1] 王兆安[1] 

机构地区：[1]西安交通大学电气工程学院,陕西省西安市710049

出　　处：《电力系统自动化》2007年第13期72-76,共5页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目(59737140)~~

摘　　要：首先介绍了三相四线制系统中负荷的特殊情况,接着简要分析了静止无功发生器(SVG)的工作原理。针对三相四线制系统的特征,将应用于三相三线制的基于时域变换算法(TTA)的电流检测算法进行改进后,得到了一种用于三相四线制系统的TTA。该算法具有检测精度高、动态性能好的优点,能够检测出负载电流的正序、负序、零序、有功、无功和谐波分量。实验和现场运行结果表明,将该算法运用于SVG中,不但具有良好的无功补偿能力,并且能够很好地补偿谐波和抑制不平衡电流,中线电流也基本能够消除。A static var generator （SVG） device based on an improved detail in this paper, which is applied to three-phase four-wire power time-domain transform algorithm （TTA） is described in system. Firstly, the characteristics of load with a three-phase four-wire power system are dealt with. Secondly, the basic operating principle of the SVG device is discussed. The improved TTA is presented after TTA based on the three-phase three-wire power system is extended further in order to detect the load current. The improved TTA has the advantages of higher accuracy and shorter response time. Finally, some experimental and running results are obtained, which show that the device has excellent performance. It can not only greatly decrease total harmonics distortion but also effectively compensate for the reactive and unbalanced current.

关 键 词：静止无功发生器 三相四线 改进型TTA 不平衡电流 

分 类 号：TM761[电气工程—电力系统及自动化]