基于特高频法的XLPE电缆局部放电定位技术研究

Research on Partial Discharge Localization Technology of XLPE Cable Based on UHF Method

在开展电缆局放的定位研究中,将特高频技术应用到XLPE电缆的局部放电带电检测,采用电容式传感器从电缆本体上获取局放信号,提出了一种有别于传统方法的局部放电定位技术,即短距离时差定位分析法。通过试验数据及现场实际检测数据分析局放定位新技术的有效性、实用性及目前存在的不足。该定位技术无需依赖于复杂的理论研究模型,适用于现场检测对电缆局部放电故障及环境噪声来源进行定位。

During the research of cable partial discharge （PD） localization, ultra high frequency （UHF） technology was applied to partial discharge detection of XLPE cable. The capacitive sensor was used to obtain PD signals from the cable body, and a short distance time-delay localization analytical method was proposed, which was different from the traditional PD localization technology. The effectiveness, practicability, and disadvantages of the new PD localization technology were analyzed according to the experiment data. The new technology does not need depend on complicated theoretical model, and it can be suitable for partial discharge fault localization of cables as well as environment noise localization on the field test.