The EMTP simulation results show that the faults during power swing can be identified correctly by use of the algorithm so that the protection need not to be blocked during system swing.

• 该算法能正确区分纯振荡与故障，避免保护误动，在振荡过程中发生故障特别是轻微故障时，亦能迅速识别，其性能优于取传统的振荡闭锁方案。