中文摘要：

提出一种基于故障录波信息的输电线路继电保护内部故障在线检测方法，通过对故障录波装置现有启动方式进行必要的扩展，利用故障录波装置记录的动态信息为依据，从而实现对输电线路中保护装置内部故障进行在线检测。应用此方法，能够对正确揭示和描述电力系统隐藏故障提供一条有效途径。通过原理分析及举例说明，验证了此方法的合理性。

英文摘要：

This paper advances a new method based on the fault information of expanded starting mode. Aiming at the inside characteristics of transmission lines＇ relay protection and congregating electrical power information systems, this method can online inspect the inner failures in transmission lines＇ relay protection effectively. It provides an effective approach of exposing and describing the hidden failures of power system, and has been proved by an example.