在运有载分接开关故障多维统计分析

为加强分接开关故障的事前预防与隐患排查，保障电力系统的安全稳定运行，根据故障类型、产品类型和应用环境等维度，对国家电网公司在运分接开关进行故障统计分析。研究结果表明:分接开关发生“分接头不同步”的概率相对最高，二次回路的继电器故障频次最高；真空灭弧分接开关的故障概率略低于绝缘油灭弧分接开关；气候湿润地区、昼夜温差大地区及极寒地区的分接开关故障较多；网侧电压750 kV的电压等级下分接开关故障较多。研究结果可为增强电力系统运行的稳定性提供参考。

Multi-dimensional statistical analysis on faults of on-load tap changer in operation

In order to strengthen the advance prevention and hidden danger investigation of tap changer faults and ensure the safe and stable operation of power system,according to the dimensions of fault type,product type and application environment,the statistical analysis on the faults of tap changer in operation of the State Grid Corporation of China was conducted.The results showed that the probability of “desynchronized tap joint” of the tap changer was relatively the highest,and the frequency of relay fault of the secondary circuit was the highest.The fault probability of vacuum arc extinguishing tap changer was slightly lower than that of insulating oil arc extinguishing tap changer.There were many tap changer faults in the humid areas,areas with large temperature difference between day and night and extremely cold areas.There were many tap changer faults under the voltage level of 750 kV at the grid side.