摘要
研究了基于虚拟三相dq0变换法原理的DVR,实现了对电压暂降抑制的仿真试验。针对在刚开始投入DVR的初始时刻出现检测电压与实际电压不符的问题,进行了理论分析,提出了采用延时闭锁dq0变换法3.4ms的方法,并结合仿真试验,证明了该方法不仅能避免刚投入检测方法时的错误检测,也能在真正发生电压暂降时准确有效地进行补偿。
A dynamic voltage restorer based on virtual three phase dq 0 transform is studied in this paper.And the simulation about suppressing of voltage sag was carried out.First,a problem that the detected voltage and the actual voltage disagree during the beginning of the input of the DVR is theoretically analyzed.A new method that delayed closing dq 0 transform for 3.4 second is suggested.Simulating experiment was carried out,and it turns out that this method not only can avoid the detecting error,but also can effectively compensate the voltage sag.
作者
黄乐
HUANG Le(Meizhou Power Supply Bureau of Guangdong Power Grid Co.,Ltd.,MeiZhou,514000)
出处
《电工技术》
2018年第1期16-17,23,共3页
Electric Engineering
关键词
电压暂降
DVR
单相dq0变换法
检测闭锁
voltage sag
dynamic voltage restorer
single phase dq0 transform
detection closing
