绝缘击穿理论在电缆附件安装中的应用

Application of insulation breakdown theory in cable accessories installation

在电缆运行中,电缆附件的故障居高不下,电缆附件的安装质量对电网的安全运行有着十分重要的影响。基于绝缘击穿的机理,结合多个电压等级的电缆附件故障现象,从电缆附件的现场施工环境、运行条件、绝缘护套的剥削、半导电层的处理、电缆本体和预制应力锥之间界面压力不足等方面入手,分析造成绝缘加速老化直至引起绝缘击穿的原因,有针对性地提出加强施工人员的教育,提高电缆附件安装工艺水平,以及建立质量跟踪体系等措施,全面提高电缆附件的安装质量,为电网的安全运行提供指导。

In cable operation,the fault of cable accessories was very high,and the installation quality of cable accessories was important to the safe operation of the power grid.Based on the mechanism of insulation breakdown,combined with the fault phenomenon of cable accessories in multiple voltage grades,from cable accessories site construction environment,the operating condition,the exploitation of the insulating sheath,semiconductor layer processing,cable between ontology and precast stress cone interface pressure was insufficient and so on aspects,analyzes the accelerated ageing of the insulation until the cause of insulation breakdown,targeted put forward to strengthen the education of construction personnel,improve the level of cable accessories installation process,and to establish quality tracking system,comprehensively improve the quality of the installation of cable accessories,to provide guidance to the safe operation of power grid.