多手段联合精确定位在电缆GIS终端局放检测中的应用

Application of Multi-measure Joint Precise Positioning in Cable GIS Terminal Partial Discharge Detection

局放检测是城市高压电缆状态检测的重要手段。鉴于电缆GIS终端结构复杂、变电站环境干扰众多等情况,提出了综合高频法、特高频法、超声波法的多手段联合检测方法,以确定局放类型,并通过同源性分析和排除干扰后,对局放进行了精确定位,可为消缺策略的制定提供详尽的依据。以某一110 kV电缆GIS终端的局放精确定位为例,为类似电缆GIS终端局放信号的检测和定位提供借鉴与参考。

Partial discharge detection technology is an important method for assessing the condition of urban highvoltage cables.The complex structure of cable GIS terminals and interference from the substation environment present challenges.A multi-measure combined detection approach,utilizing high frequency,ultra-high frequency,and ultrasonic methods,is proposed to identify the type of partial discharge.Through homology analysis and interference elimination,precise localization was achieved,providing a detailed reference for developing elimination strategies.A case involving the accurate localization of a 1ikV cable GIS terminal is illustrated to offer guidance for similar signal detection and location in cable GIS terminals.