一种基于机电波理论的电网扰动在线定位方法  

An on-line disturbancelocation algorithm for power networks based on the electromechanical wavestheory

作　　者：燕跃豪[1] 毕天姝[1] 杨奇逊[1] 

机构地区：[1]华北电力大学新能源电力系统国家重点实验室,北京102206

出　　处：《华北电力大学学报（自然科学版）》2014年第1期1-6,83,共7页Journal of North China Electric Power University：Natural Science Edition

基　　金：国家重点基础研究发展计划项目(973项目)(2012CB215206);国家自然科学基金项目(51222703);高等学校博士学科点专项科研基金(20120036110009);"111"计划项目(B08013)

摘　　要：扰动位置的及时获得对于进行电网安全稳定控制具有重要价值。根据扰动后发电机频率在稳态时的短周期波动特性以及机电波到达后的单调特性,提出了基于滑动数据窗的机电波到达时间在线辨识方法,能够在线快速建立待检时间向量。针对电网的框架结构模型对应的无向赋权图,采用全局最短路径搜索的Floyd算法构建了由不同故障点机电波在整个电网中传播时间组成的参考时间矩阵。最终借助最小距离分类器原理实现扰动位置的辨识。仿真结果验证了本算法的正确性。Disturbance locating is valuable to the power system security and stability control. In this paper, by compa- ring the short-period volatility of generator frequency at steady state and monotonicity when the electromechanical wave arrives, a sliding time window based identification method for the arrival time of electromechanical wave is put forward which could build the inspection time vector online. According to the weighted undirected graph of structural frame model of power system, the Floyd method for the shortest path search is applied to build the reference time matrix which shows the propagation time of electromechanical wave induced by different disturbance locations. Finally the disturb- ance is located by minimum distance classifier. The proposed approach is verified by case study.

关 键 词：扰动定位 机电波 滑动数据窗 FLOYD算法 最小距离分类器 

分 类 号：TM7[电气工程—电力系统及自动化]