摘要
行波衰减特性和不同的故障条件是影响在线行波定位精度的重要因素。利用建立的10 kV配电网电缆行波传播衰减模型,分别研究了行波频率参数、时域参数与传输距离的关系。分析了不同因素对行波定位结果的影响。结果表明,行波幅值比、波头时比、波尾时比和脉宽比参数与传输距离呈二次函数关系。其中幅值比随传输距离单调减小,其他三个参数随传输距离单调增大。此外,故障行波头尾时间和故障点位置对故障定位结果有一定影响。如果初始波头尾时间短,传输距离长,那么会导致定位误差增大。研究发现故障过渡电阻对定位结果影响不大。最后,基于行波传播衰减特性的研究,提出了基于衰减特性的行波故障定位方法。
The traveling wave attenuation characteristics and different fault conditions are important factors affecting the online traveling wave positioning accuracy. The traveling wave propagation attenuation model of the 10 kV distribution network cable is established, and the relationship between traveling wave frequency parameters, time-domain parameters, and transmission distance is studied respectively. The effects of different factors on the traveling wave positioning results are analyzed. The results show that the traveling wave amplitude ratio, wave head time ratio, wave tail time ratio, and pulse width ratio parameters are quadratic with the transmission distance. The amplitude ratio decreases monotonically with the transmission distance, and the other three parameters increase monotonically with the transmission distance. In addition, the fault traveling wave head and tail time and fault location have a certain influence on the fault localization results. If the initial wave head and tail time are short and the transmission distance is long, it will lead to an increase in the localization error. It is found that the fault transition resistance has little influence on the localization results. Finally, based on the study of attenuation characteristics of traveling wave propagation, a fault location method based on attenuation characteristics of the traveling wave is proposed.
作者
林师玄
刘晓
张迎晓
王泉华
林劝立
段宜廷
万山明
LIN Shixuan;LIU Xiao;ZHANG Yingxiao;WANG Quanhua;LIN Quanli;DUAN Yiting;WAN Shanming(Yuexiu Power Supply Bureau of Guangzhou Power Supply Bureau Co.,Ltd.,Guangzhou Guangdong 510030,China;State Key Laboratory of Strong Electromagnetic Engineering and New Technology,Huazhong University of Science and Technology,Wuhan Hubei 430074,China)
出处
《电子器件》
CAS
北大核心
2022年第1期167-171,共5页
Chinese Journal of Electron Devices
基金
中国南方电网有限责任公司科技项目(GZHKJXM20180147)。
关键词
电缆
衰减特性
行波
故障定位
Cable
attenuation characteristics
traveling wave
fault localization
