Hidden Trouble Investigation System of Substation Relay Protection Secondary Circuit Based on Optical Fiber Communication
Aiming at the hidden dangers in the secondary circuit of substation relay protection,a hidden danger investigation system based on optical fiber communication is designed.The system uses optical fiber sensing technology to measure parameters such as current and voltage with high precision,realizes high-speed data transmission through optical fiber Ethernet,and introduces machine learning algorithm in application layer for fault diagnosis.Finally,an experimental platform was built to monitor the 500 kV substation for 1 month.The results show that the diagnostic accuracy of the designed system is 97.5%,the diagnostic delay is as low as 75 ms,and the network delay jitter is less than 10 ms,which provides new ideas and methods for improving the reliability of substation relay protection.
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