摘要
提出一种新颖电压源型连续可调无功功率补偿器的控制策略,采用正弦脉宽调制(sinusoidal pulse width modulation,SPWM)电压源型逆变器(voltage source converter,VSC)直接调节补偿电抗上的电压,实现补偿器的连续可调感性无功功率输出。该补偿器克服了传统晶闸管控制电抗器(thyristor controlled reactor,TCR)的谐波问题,并且逆变器的最大工作容量仅为补偿容量的25%。结合晶闸管投切电容器(thyristor switched capacitor,TSC)可大大降低动态无功补偿部分的容量,并实现无功功率的连续双向调节。建立基于Matlab/Simulink的系统仿真模型,对控制策略进行仿真研究。最后设计制作高性能数字控制器,通过实验验证提出的控制策略是有效可行的。
This paper proposed a novel strategy to control rapidly dynamic var compensator based on voltage source converter （VSC）. The proposed compensator combines the sinusoidal pulse width modulation （SPWM） type inverter to regulate the voltage on the compensating inductor directly, so the continuous output of inductive reactive power is realized, which is suitable for the low and middle voltage distribution system. With this compensator, the harmonic problem of thyristor controlled reactor （TCR） is overcome, and the capacity of the inverter is only 25% of the rating capacity. Combined with thyristor switched capacitor （TSC） to realized bidirectional reactive power regulate, and the capacity of dynamic var could be reduced greatly. The system simulation model based on Matlab/Simulink is given, then the good performance digital controller is designed. Finally, the experimental results show that the proposed control strategy is feasible and efficient.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2009年第24期1-5,共5页
Proceedings of the CSEE
基金
"十一五"国家科技支撑计划重大项目(2007BAA12B03)~~
关键词
无功补偿
功率因数
逆变器
数字控制
正弦脉宽调制
var compensation
power factor
inverter
digital control
sinusoidal pulse width modulation
