220kV线路纵联保护远跳功能的应用

纵联保护的远跳回路能在发生故障后,通过保护光纤通道快速切除线路对侧断路器,因其动作时限快于接地距离保护、零序电流保护,能防止故障或系统事故进一步发展,有效地提高系统的稳定性,因此在实际工程中得到了广泛应用。但在设计过程中存在两种不同接线方式,结合工程实际根据不同接线方式进行分析论证。

The Application of Remote Tripping in 220 kV Transmission Line Pilot Protection

The remote tripping circuit of pilot protection could cut off the circuit breaker on the other side of the transmission line across the optical fiber channel during system fault. As the remote tripping function could isolate system fault much faster than the grounding distance protection and the zero-sequence current protection, it could prevent the system fault from extending, and as a result improves the operating stability of the system. Because of the advantages observed above, it has been widely used in projects. However, there are two different kinds of remote tripping circuits in use. This paper will analyze both of the circuits according to project application, and then conclude the advantages and disadvantages of both of the circuits.