Fiber Channel Fault Location of Measurement and Protection Device Based on Uncertainty of Communication Fingerprint and Fiber Pilot Protection

The failure of the fiber channel of the measurement and protection device of power system may lead to protection failure and system out of control. This greatly affects the safety and reliability of system operating. First, this paper discusses the fiber communication method and its channel fault diagnosis method of fiber pilot protection devices, and designs an online monitoring method that cooperates with the physical links and communication status of those devices. Second, using uncertainty communication fingerprint detection technology, it can diagnose some uncertain issues of protection information mis-transmitted, protection device refusing to move and mis-operation. Finally, taking a certain transmission line protection system equipped with optical fiber communication as test case, the experimental results verify that the proposed diagnosis method has good effectiveness and accuracy in diagnosing fiber channel faults. Keywords—fiber pilot protection, protection device failure, fiber channel fault location, communication fingerprint