穿刺电极式避雷器在10 kV配电线路中的应用研究

Study on the Application of Puncture Electrode Arrester in 10 kV Distribution Line

主要通过以穿刺电极外串联间隙避雷器及P10,P20及PS153种瓷绝缘子作为研究对象,通过按照绝缘配合要求,选择并联避雷器的U50%雷电放电电压比被保护绝缘子的U50%雷电放电电压低20%~30%及《DL/T 815-2012交流输电线路用复合外套金属氧化物避雷器》中对于10 kV外串联间隙金属氧化物避雷器的间隙距离选择要求两种方式,对穿剌电极避雷器的间隙距离选择进行试验探究;并通过comsol有限元分析软件对穿刺电极避雷器安装前后线路的电位及电场变化情况进行分析,得出穿刺电极避雷器的通用间隙距离的选择,且穿刺电极避雷器的安装使用对原线路的电位及电场影响较小,不会影响10kV配电线路的正常运行。

A seriesgap arrester with a puncture electrode and three kinds of porcelain insulators,P10,P20 and PS15,have been studied.Following the insulation coordination requirements,and according to two ways of the U50%lightning discharge voltage of the parallel arrester is 20%~30%lower than that of the protected insulator and《DL/T 815-2012 Polymer-housed metal oxide surge arresters for a.c.power transmission lines》for 10 kV Series Gap MOA clearance distance selection requirements,to study the gap distance of 10 kV metal oxide arrester with series gap.Through the COMSOL finite element analysis software,the potential and electric field changes of the line before and after the installation of the puncture electrode arrester are analyzed.The universal gap distance of the puncture electrode arrester is obtained,and the installation and use of the puncture electrode arrester have little influence on the potential and electric field of the original line,which will not affect the normal operation of 10kV distribution line.