摘要
内容提要，本文对发电机一变压器组合单元，因三相油开关在运行中或在并、解列操作中非全相引起的纵向故障进行了状态分析，提出了用状态电流进行故障快速判断的思路，相信对电厂运行人员有一定的参考价值。
This paper presents the analysis of the Vertical fault in the generator-tranformer combined unit,which is caused by open circuit of the paralled off or oil circuit breaker operation.A new fast fault location method has been provided based on the state current.The results are Valuable to the power plant operator.
