摘要
故障测距技术是线路抢修和恢复供电的关键技术之一,目前大多数故障测距技术需要准确的故障波形。采用ATP-EMTP程序模拟了10 kV配电线路弧光接地、高阻接地以及500 kV单相金属性接地、两相短路和三相接地故障,获得了相应典型故障波形。提出一种基于Logistic函数的小波阈值函数,并应用于上述五种典型的故障波形的去噪分析中,与常规的硬阈值、软阈值的去噪效果对比表明,所提方法可以较好地对输电线路典型故障波形进行去噪处理。
Fault location technology is one of the key technologies for line repair and power supply restoration.At present,most fault location technologies need accurate fault waveforms.In this paper,ATP-EMTP program is used to simulate arc grounding and high resistance grounding of 10 kV distribution lines,as well as 500 kV singlephase metallic grounding,two-phase short circuit and three-phase grounding faults,and corresponding typical fault waveforms are obtained.A wavelet threshold function based on Logistic function is proposed,which is applied to the denoising analysis of the typical fault waveforms obtained above.Compared with the conventional hard threshold and soft threshold,the proposed method can effectively denoise the typical fault waveforms of transmission lines.
作者
朱勇
竺裕峰
林启新
肖宁
ZHU Yong;ZHU Yufeng;LIN Qixin;XIAO Ning(Ninghai Power Supply Company of State Grid Zhejiang Electric Power Co.,Ltd.,Ninghai 315600,China)
出处
《电气应用》
2023年第6期33-40,共8页
Electrotechnical Application
基金
国网浙江省电力有限公司宁海县供电公司创新咨询项目(SGZJNBNHYJWT2200171)。
