地铁主变电所电抗器操作过电压问题分析及解决方案

Solution to Overvoltage Problems in Reactor Operation at Main Subway Transformer Substation

在成都地铁1号线主变电所无功补偿工程中,当真空断路器切电抗器时有爆鸣声响和弧光的现象。分析了产生过电压的原因,比较了不同过电压保护装置的优缺点。工程实践证明,采用阻容吸收器进行过电压抑制效果良好。目前,在成都地铁线中,主变电所需要切电抗器均优先采用阻容吸收器。

In the var compensation project of the main transformer substation on Chengdu subway Line 1, a deto- nation sound and arc phenomena happened when vacuum circuit breaker sheared the reactor. The causes of overvolt- age are analysed, the advantages and disadvantages of over- voltage protection devicesare compared. Engineering prac- tices prove that R/C absorber used for overvoltage suppres- sion has good performance. At present, the R/C absorber is preferred by the main transformer substation on Chengdu subway lines.