全绝缘管型母线缺陷分析及改进措施

Analysis of Operation Defects and Improvement Measures of Fully-insulated Tubular Bus-bar

全绝缘管型母线作为变电站主变压器低压侧一种新型的导流产品具有载流大、集肤效应小等特点,近年来在变电站中得到了广泛应用。但全绝缘管型母线在运行过程中故障频发,经常出现烧损、放电等情况。文中结合某供电公司出现的全绝缘管型母线烧损故障,针对全绝缘管型母线设计、制造缺陷进行深入分析,并提出了新的改造方法。最终在某220 kV变电站中成功应用,并取得了良好的运行效果。

As a new type of diversion product on the low-voltage side of the main transformer of a substation,the fully-insulated tubular bus-bar has the characteristics of large current carrying capacity and small skin effect,and has been widely used in substations in recent years.But the fully-insulated tubular bus-bar has frequent defects during operation,and often burns and discharges.Based on the burn-in failure of the fully-insulated tubular bus-bar in a power supply company,this paper analyzes the design defects of the fully-insulated tubular bus-bar,and proposes a new transformation method.Finally,it was successfully applied in a 220 kV substation and achieved good operating results.