基于时域谱熵的多电缆线路弧光接地过电压特征快速识别  

Identification of Critical Parameters of arc Grounding Overvoltage Based on Time-frequency Spectrum Entropy

作　　者：张增强 陈伟伟 薛静杰 徐龙秀 翟旭京 吴伟丽 ZHANG Zeng-qiang;CHEN Wei-wei;XUE Jing-jie;XU Long-xiu;ZHAI Xu-jing;WU Wei-li(National Grid Xinjiang Electric Power Co.,Ltd.Institute of Economics and Technology,Urumqi 830000,China;College of Electric and Control Engineering,Xi'an University of Science and Technology,Xi'an 710054,China;Anhui Zheng-Guang-Dian Electric Power Technology Co.,Ltd.,Hefei 230000,China)

机构地区：[1]国网新疆电力有限公司经济技术研究院,新疆乌鲁木齐830000 [2]西安科技大学电气与控制工程学院,陕西西安710000 [3]安徽正广电电力技术有限公司,安徽合肥230000

出　　处：《数学的实践与认识》2020年第17期81-89,共9页Mathematics in Practice and Theory

基　　金：新疆自治区面上项目(2017D01C417);西安科技大学博士启动金(2017QDJ033)。

摘　　要：为了快速识别多电缆线路弧光接地时电力系统参数的临界特征,避免间歇性电弧造成的过电压故障,提出了基于时域谱熵的过电压特征识别方法:首先,提取了弧光接地过电压影响因素特征,并进行了蒙特卡洛模拟,求得各种条件下的弧光接地波形;接着,定义了基于时频谱的故障特征量指标,并利用快速Kurtogram算法加以求解;最后,构建弧光接地故障的系统临界参数集合,提出了过电压故障故障参数临界阈值和辨识方法.利用某石化电力系统实际参数进行仿真验证,结果表明,方法能够很好地多电缆线路配电系统弧光接地过电压故障,可望为治理和规避弧光接地过电压风险提供有用参考.In order to quickly identify the critical characteristics of power system parameters and avoid the over-voltage fault caused by intermittent arc,an over-voltage feature recognition method based on time-domain spectral entropy is proposed:firstly,the characteristics of influencing factors of arc grounding over-voltage are extracted,and Monte Carlo simulation is carried out to obtain the arc grounding waveform under various conditions;secondly,the definition of arc grounding waveform is given Based on the fault characteristic index of time spectrum,the fast Kurtogram algorithm is used to solve the problem.The simulation results show that the method can solve the arc grounding overvoltage fault of multi cable distribution system,and it is expected to provide a useful reference for controlling and avoiding the risk of arc grounding overvoltage.

关 键 词：弧光接地过电压 MONTECARLO Kurtogram算法 临界特征 影响因素 

分 类 号：TM862[电气工程—高电压与绝缘技术]