以110kV及以下变电所常见的分段备自投逻辑和进线备自投逻辑为例,结合现场工程实际,分析了许继公司的分段备自投装置WBT-821A的备自投动作逻辑缺陷,分别从软件设计方面和屏柜设计方面提出了改进方法,详细分析了四方公司的进线备投装置CSC-246在主变动作后的特殊逻辑闭锁问题,指出了在使用中应注意的问题。 Taking substation logic and subroutine logic of substations prepared in 110kV and below substations as an example, this paper analyzes the preparation and operation of the WBT-821A of XUJI company based on the field engineering practice Logic flaw, respectively from the software design and screen cabinet design put forward an improved method, a detailed analysis of the Quartet’s incoming line preparation device CSC-246 in the main transformer after the special logic block problem, pointed out that the use should be noted The problem.