浅谈母差保护微机化的几点感受

通过总结大量变电站母差保护微机化改造中发现的问题,从电流互感器、二次负载、抗饱和能力、保护动作时间、运行方式判别等几个方面,对继电器式和微机式母差保护进行了对比分析,指出工程人员往往只重视保护的更换,而忽略了电流互感器的更换,导致因电流互感器与保护不匹配而产生母差保护误动作,同时阐明了微机式母差保护的优点.

Discussion on microprocessor-based bus bar protection

Through a large number of problems about rebuilding transformer substation microprocessor bus bar protection, this paper analyzes several aspects of relayed bus bar protection and microprocessor-based bus bar protection from current transformers, the secondary load, the anti-saturation ability, the action time and operating mode. Then it points out that engineers often pay more attention on the replacement of protection, neglects the replacement of current transformers, which leads to the mistaken action of bus bar protection because current transformer is mismatched with protection. At the same time, it illustrates the advantages of microprocessor-based bus bar protection.