摘要
提出了一种三相四线系统动态电压调节器(dynamic voltage regulator,DVR)的单周控制模型。在分析主电路的基础上推导出了DVR的单周控制模型。在电压骤降、骤升以及电源中含有谐波的情况下对新建立的模型进行了仿真研究。结果表明,单周控制用于三相四线DVR既具有较好的动态特性,又控制电路简单。在电压变化范围不大于30%时有较好的补偿效果,并对电源谐波有一定的抑制作用。
A new one-cycle control scheme of dynamic voltage regulator (DVR) for three-phase four-wire system is proposed. On the basis of main circuit analysis, the one-cycle control model for DVR is deduced and simulated under voltage sag by 35% of rated voltage, voltage swell by 35% of rated voltage and the condition that there are harmonics in power source. Simulation results show that DVR with one-cycle control for three-phase four-wire system not only possesses better dynamic characteristics, but also its control circuit is simple. The DVR with one-cycle control can offer better compensation while the voltage variation extent is less than 30% and can restrain harmonics in power source as well.
出处
《电网技术》
EI
CSCD
北大核心
2007年第2期52-56,共5页
Power System Technology
关键词
动态电压调节器
单周控制策略
三相四线系统
控制建模
电能质量
dynamic voltage regulator
one-cycle control strategy
three-phase four-wire system
control modeling
power quality