基于小波变换的HVDC系统故障检测  

Fault detection of HVDC system based on wavelet transform

作　　者：王金玉[1] 赵月娇[1] 孔德健 盖磊[1] 

机构地区：[1]东北石油大学电气信息工程学院,大庆163318 [2]国网冀北电力有限公司检修分公司,北京102488

出　　处：《国外电子测量技术》2017年第2期37-40,共4页Foreign Electronic Measurement Technology

摘　　要：利用反向电压行波4层小波系数绝对值的最大值可以用来区分直流故障和交流故障。通过对HVDC系统进行建模,举例几种常见故障,并使用MATLAB小波工具箱进行模拟。通过观察各种不同故障期间反向行波电压深度为4层的离散小波分析,确定故障类型,并区分直流故障和交流故障类型。仿真结果验证了小波变换的实用性。The maximum value of the absolute value of the four-layer wavelet coefficient can be used to distinguish the DC fault and the AC fault. By modeling the HVDC system, several common faults are illustrated and simulated using the MATLAB wavelet toolbox. The fault types are identified by observing the discrete wavelet analysis of the 4-layer reverse traveling wave voltage during different faults, and the DC faults and AC fault types are distinguished. Simulation results show the practicability of wavelet transform.

关 键 词：HVDC 小波分析 故障检测 反向行波电压 行波 

分 类 号：TN806[电子电信—信息与通信工程] TM726[电气工程—电力系统及自动化]