基于空间矢量的快速电压暂降检测方法  

A detection method for fast voltage sag based on space vector

作　　者：程志友[1,2] 马千里[2] 张红飞 李涛[2] 

机构地区：[1]教育部电能质量工程研究中心,合肥230039 [2]安徽大学电子信息工程学院,合肥230039 [3]国家电网安徽培训中心,合肥230051

出　　处：《电测与仪表》2017年第18期59-64,71,共7页Electrical Measurement & Instrumentation

基　　金：国家自然科学基金资助项目(61172127);高等学校博士学科点专项科研基金(20113401110006)

摘　　要：提出了一种基于空间矢量的快速电压暂降检测方法。该方法通过对三个不同时刻的三相电压信号进行Clark Transform,结合快速椭圆重构算法计算出空间矢量在复平面上的轨迹方程,根据轨迹形状进行电压暂降的检测并识别出故障相。同时由椭圆参数求解出电压暂降过程中电压相位角跳变值,进而根据相位角跳变值对原始电压数据进行移相处理,最终可快速计算出电压暂降深度。仿真实验验证了文中方法的有效性。A new detection method for voltage sag based on space vector is presented in this paper. Firstly, the equa- tion of the trajectory of space vector is calculated by applying Clarke Transformation and fast ellipse reconstruction method to the three-phase voltage signals of three different times. Based on the space vector trajectory, voltage sag is detected and the fault phase can be identified. At the same time, the phase angle jump is calculated from the parame- ters of ellipse. Then, the original signal data is shifted according to the phase angle jump, and the depth of voltage sag could be calculated rapidly. The simulation results verify the effectiveness of the proposed method.

关 键 词：电压暂降 空间矢量 椭圆重构 

分 类 号：TM711[电气工程—电力系统及自动化]