摘要
电压暂降的快速检测是备用电源迅速投入电网的前提。为此,提出一种适用于备用电源无缝切换工作特性的电压暂降检测算法,以形态滤波器中的自适应复合形态滤波器对电压信号进行滤波,将滤波后的信号经过双二阶广义积分器锁相环处理实现三相不平衡电压的正、负序解耦,从而完成电压暂降的快速检测。仿真结果表明,检测时间小于6 ms,收敛性好,满足了速度性与实时性的要求。检测方法在并网和备用电源等方面有较大应用价值。
The rapid detection of voltage sag is the premise for the backup power to be quickly put into the power grid.Therefore,a voltage sag detection method was proposed to solve the problems of rapidity and real-time performance of the current detection algorithm.The voltage signal was filtered by the adaptive composite morphological filter in the morphological filters,and the filtered signal was processed by a phase-locked loop of a dual second-order generalized integrator to realize the separation of the positive sequence and the negative sequence of the three-phase unbalanced voltage,so as to complete the rapid detection of voltage sag.The simulation results show that the detection time of the method is less than 6 ms,the convergence is good,and it meets the requirements of speed and real-time performance.The detection method has great application value in grid.
作者
周军
厉运强
类腾辉
王岩
Zhou Jun;Li Yunqiang;Lei Tenghui;Wang Yan(School of Electrical Engineering,Northeast Electric Power University,Jilin Jilin 132012,China;Yanbian Power Supply Branch,State Grid Jilin Power Co.,Ltd.,Yanji Jilin 133000,China;Jilin Power Supply Branch,State Grid Jilin Power Co.,Ltd.,Jilin Jilin 132012,China)
出处
《电气自动化》
2023年第4期91-93,共3页
Electrical Automation
基金
吉林省发展和改革委员会产业技术研究与开发项目(2019C057-3)。
关键词
电压暂降
滤波
形态滤波器
双二阶广义积分器锁相环
解耦
voltage sag
filtering
morphological filter
double second order generalized integrator phase locked loop(DSOCI-PLL)
decoupling