| 引用本文: | 刘兵,胡勇,阮江军,韩海宏,余也凤.基于小波分析频差性的电力电缆故障测距[J].电力自动化设备,2009,(3): |
| .Power cable fault locating based on frequency difference characters of wavelet analysis[J].Electric Power Automation Equipment,2009,(3): |
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| 摘要: |
| 为了提高电力电缆在线单端故障测距方法运用到放射状中压配电系统的准确性,研究了电压行波在配电系统不同地点的反射和透射频差特性,运用小波变换结果模极大值确定电压行波到来时刻的同时,利用所选小波滤波器相频特性提炼电压行渡信号携带的原有频差特性信息.有效地判断出到达母线的第2个行波是故障点反射波还是对端母线反射波.基于某变电站出线构建EMTP仿真模型,仿真结果表明这种利用小波分析频差性的电力电缆在线单端故障测距方法能够较精确地寻找到故障点. |
| 关键词: 电力电缆 行波 故障测距 小渡分析 频差性 |
| DOI： |
| 分类号:TM755 |
| 基金项目:国家自然科学基金? |
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| Power cable fault locating based on frequency difference characters of wavelet analysis |
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LIU Bing1 HU Yong2 RUAN Jiangjun1 HAN Haihong3 YU Yefeng1
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| Abstract: |
| In order to improve the accuracy of on-line single-end fault locating for power cables used in radial medium voltage distribution system,the reflection and refraction frequency difference characters of vol-tage traveling waves at different position of cable distribution power system,is studied. The arriving time of voltage traveling wave is defined by the modular maximum of wavelet transform results,while the phase-frequency characters of preferred wavelet filter are used to abstract the intrinsic frequency... |
| Key words: power cable traveling wave fault locating wavelet analysis frequency difference characters |
