朱建华 寸朝钦 胡云兴

摘要：本文介绍了500kV高海拔地区紧凑型线路带电更换直线塔V串绝缘子存在的问题，并以500kV西北甲、乙线为例，对带电作业的可行性进行研究，提出高海拔紧凑型直线塔开展带电作业是安全的、可行的。由于紧凑线路为节约建设成本、压缩通道占用面积，导致塔型结构和导线布置紧凑，塔头间隙和相间距离较常规线路小，鉴于等电位作业人员从塔窗进入等电位的方式存在一定的危险性。本文介绍南方电网超高压输电公司曲靖局多年来带电更换500kV甲、乙线紧凑型直线塔V串绝缘子方法，该方法安全高效，操作简单，所需工器具少，供高海拔500kV紧凑型线路带电作业参考和借鉴。

关键词：高海拔 500kV 紧凑型线路 直线塔 带电作业

Abstract：This article introduces the problems in the replacement of V-string insulators on linear towers on compact lines in 500kV high-altitude areas.Takes the 500kV Northwest Line A and B as examples to study the feasibility of live working.Proposed the methods of V-String Insulators replacement on Linear Towers of 500kV Compact Transmission Lines at high altitude area is safe and feasible.Because of the compact line saves construction costs and compresses the area occupied by the passage，so the tower structure and conductor lines layout are compacted，the air gaps and distance between the tower heads are smaller than conventional lines.In view of the way that equipotential operators enter the equipotential area from the tower window，there is certainly dangerous.This article introduced the method of replacing the V-string insulators of 500kV compact linear towers on lines A and B on the live line of Qujing Bureau of Southern Power Grid UHV Transmission Company for many years.This method is safe and efficient，simple to operate and requires less tools and equipment，can as a reference to high-altitude 500kV compact line live working.

Keywords：High Altitude，500kV，Compact Transmission Lines，Linear Towers，Live working

1 引言

高海拔地区开展带电业，存在工器具多，运输困难，作业方法受地型限制等问题，尤其在更换500kV紧凑型线路绝缘子时，进出强电场时对路径选择，作业工器具选用，使用方法都直接决定着作业效率，同时关系到作业设备及作业人员安全。南方电网超高压输电公司曲靖局经过多年探索研究，不断总结，多次成功开展了《带电更换500kV紧凑型线路直线塔上相内外串V串绝缘子》，《带电更换500kV紧凑型线路直线塔中相V串绝缘子》。曲靖局所辖500kV紧凑型线路直线塔塔型（CZ1-CZ8、CZK）共9种，其中以CZ1塔型塔窗尺寸最小，本文以500kV西北甲线塔型为CZ1的小塔窗杆塔为例，介绍在146#塔上相内串绝缘子更换工器具，进出强电场路径选择，更换方法。……