ACTION ANALYSIS OF A 220kV OPTICAL FIBER CURRENT DIFFERENTIAL PROTECTION

As the main protection of 220kV and above transmission lines in power system, the selectivity and reliability of optical fiber current differential protection play a vital role in the stable operation of power system.For optical fiber differential protection, this paper analyzes the malfunction of a 220kV optical fiber differential protection, and puts forward corresponding operation and maintenance and control measures for the protection device to improve the reliability of power supply.