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With its large transmission capacity, low communication loss, strong anti-interference ability and long transmission distance, optical cable has become an important transmission channel of longitudinal differential protection information. Whether it is direct route or circuitous route communication mode, the interfaces and cables of protection devices and communication devices may fail, and these devices and cables are maintained by different operation and maintenance departments. When a fault occurs, the mutual cooperation of multi department operation and maintenance system and operation and maintenance personnel is required to locate the fault. The efficiency of troubleshooting is low, which seriously reduces the power supply quality of the power grid. By introducing semantic technology, this paper correlates the data attributes between various systems, and finally locates the location information of faulty equipment from the initial PMS alarm, so as to realize the intelligent fault search, which provides convenience for the operation and maintenance personnel to locate the fault.
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