摘要
对于可有效解决电压凹陷问题的动态电压恢复器来说,准确检测出电压凹陷的三大特征量即凹陷幅值、持续时间和可能出现的相位跃变是其关键所在,分析了目前常用的单相电压凹陷特征量检测方法,提出了一种改进的检测算法,该算法利用求导数法来构造三相虚拟电压,通过瞬时电压d-q变换和低通滤波器得到凹陷特征量。仿真分析证明了这种方法的可用性。
The correct detection of the voltage sag characteristics, i.e. its magnitude, duration and phase-angle jump appeared at the same time, is of great importance for the dynamic voltage restorer to effectively solve the problem of voltage sag. This paper analyses single-phase voltage sag detection to propose an improved method to detect voltage sag characteristics based on derivative algorithm, low-pass filter and d-q transformation. At last, the availability of this method is verified by the results of computer simulation.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2009年第20期39-42,共4页
Power System Protection and Control
