新型可控无源滤波器的实验研究  

Experiment of a Novel Controllable Passive Filter

作　　者：刘志珍[1] 杨志坚[1] 于爱国 

机构地区：[1]山东大学,山东济南250061 [2]青岛益和电气股份有限公司,山东青岛266012

出　　处：《电力电子技术》2005年第3期1-2,共2页Power Electronics

基　　金：中国博士后科学基金资助项目(2003032200)~~

摘　　要：提出了一种新型可控无源滤波器,该滤波器利用晶闸管控制的高短路阻抗变压器(TCT)作为可控电抗器,通过改变它的触发角来改变可控电抗器的等效电感,使滤波器在电容变化后重新回到谐振状态,从而实现无源滤波器的自动调谐。本文以单相全控桥整流电路为例进行了实验研究,当电容值变化8.62%时,造成了滤波后进入系统的电流波形严重畸变,3次谐波电流畸变率HRI3达28%。通过调节TCT的触发角大小,HRI3变为1.14%,基本保持正弦波形且正负半周对称。结果表明该可控无源滤波器非常适用于一般电力电子装置的谐波抑制。This paper presents a novel controllable passive filter which uses the thyristor controlled transformer(TCT) with high short-impedance as a variable reactor. The equivalent inductor of the variable reactor is changed by ad-justing the triggering angle of the thyristor to make the filter holding resonance after the capacitance deviation. The experi-ment of this filter is given for a single phase full-controlled rectifier. As ΔC=8.62%, the current waveform of system dis-torts badly after filtering and HRI3 is up to 28%. By adjusting the triggering angle of TCT,HRI3 may be equal to 1.14% and the waveform basically keeps to be sinusoidal. The results show that the proposed passive fil-ter is suitable for harmonics mitigation for most of power electronic equipments.

关 键 词：滤波器 电容 电抗器/晶闸管控制高阻抗变压器(TCT) 

分 类 号：TM761[电气工程—电力系统及自动化]