摘要
按照超高压电缆实际线路参数建立电缆依频仿真模型。通过与其他模型对比,分析不同放电信号在电缆线路中的传输特性。在耐压试验中同步使用分布式局放监测设备进行放电信号采集,将所采集放电脉冲的时域、频域特征空间变化趋势同仿真数据进行对比分析,并结合现场诊断结果确定放电信号来源和类型,准确评价330 k V交联聚乙烯电缆线路的绝缘健康状况。结果表明,所提电缆模型能更准确分析高频信号的传输特性,配合实装的分布式放电信号检测设备,可以辅助定位放电信号来源。
In this paper,a cable-dependent frequency model is established according to the actual parameters of a large-scale ultra-high voltage cable project. By comparing with other simulation models,this paper analyzes the transmission characteristics of different discharge signals in the cable line.Firstly,the distributed partial discharge monitoring equipment is used to collect the discharge signal,and the spatial variation trends of the collected discharge pulses are compared in the time domain and frequency domain to analyze with the simulation data. Secondly,combined with the on-site diagnosis results,this paper determines the source and type of the discharge signal,so as to evaluate the insulation health of the 330 kV XLPE cable line. The results show that the cable model in this paper can accurately analyze the transmission characteristics of high-frequency signals. And the installation of distributed partial discharge monitoring equipment can assist in locating the source of partial discharge signals.
作者
郭智刚
高健
闫峰
赵力
GUO Zhigang;GAO Jian;YAN Feng;ZHAO Li(State Grid Xi’an Power Supply Company,Xi’an 710032,Shaanxi,China;State Grid Shaanxi Electric Power Research Institute,Xi’an 710100,Shaanxi,China)
出处
《电网与清洁能源》
北大核心
2022年第11期17-26,共10页
Power System and Clean Energy
基金
国网陕西省电力有限公司科技项目(5226KY220009)。
关键词
330kV
长距离超高压电缆
局放试验
传输特性
信号定位
330kV
long-distance ultra-high voltage cable
partial discharge test
transmission characteristics
signal positioning
