220kV双重化主变保护旁路断路器代主变断路器运行方案

根据现行双重化主变保护配置，针对双母线接线特点，提出主变保护旁路断路器代主变断路器方案。综合运用两套复压过流保护，实现对旁路开关区域的保护。提出两套主变后备保护接于断路器电流互感器的观点，第一套后备保护电流取自旁路电流互感器，实现对旁路断路器至套管引线间的保护；第二套主变后备保护电流取自主变侧断路器电流互感器，实现对主变断路器至套管间引线的保护。通过实例介绍了旁路断路器代主变断路器运行操作步骤，分析了这一过程保护配合方式。

Implementation of bypass breaker replacing transformer breaker in 220 kV double transformer protection configuration

According to the features of double transformer protection configuration and double busbar connection,the implementation of bypass breaker replacing transformer breaker is introduced. Two multiple voltage overcurrent protections are used to realize the protection of bypass area. Two backup protections are connected to breaker CTs,one of which connects to bypass breaker CT for realizing the protection from bypass breaker to bushing while the other to transformer breaker CT for realizing the protection from transformer breaker to bushing . With an example,the operation pro-cedures are introduced and the cooperation of protections is analyzed.