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.
出处
《国外电子测量技术》
2017年第2期37-40,共4页
Foreign Electronic Measurement Technology
关键词
HVDC
小波分析
故障检测
反向行波电压
行波
HVDC
wavelet analysis
fault detection
reverse traveling wave voltage
traveling wave
