【摘要】 数字分布式母线保护是在原有的集中式微机母线保护的基础上发展起来的一种原理更先进、计算能力更强的新型数字式母线保护。就目前分布式母线保护仍与集中式母线保护具有同样的关键技术点——受电流互感器(TA)饱和影响的问题,提出了一种新的解决办法:通过计算二次电流和差流的谐波比大小可以确定TA是否发生了饱和,从而使区外故障TA发生饱和时闭锁保护,不使保护误动。更多还原

【Abstract】 Th e decentralized numeric busbar protection is an enhanced busbar protection with mo re advanced principle and strong computing ability,which is based on the centra lized microcom-puter busbar protection.However,it is still influenced by CT’ s saturation.An applied method is proposed for it to confirm the CT-saturation by calculating the ratio of secondary current to diffe-rential current ,with which the protection could be blocked to avoid the misoperation when out-area CT-saturation occurs.更多还原