Subject Area: Power Engineering
This paper presents improving the protection of 330KV transmission line against transient instability using an intelligent solid state-based protection scheme’. Sustained faults have been identified as one of the major causes of transient instabilities in power networks. The longer a fault current stays in a power network, the more vulnerable the network will be to transient instability. One key important method of protecting a transmission line against transient instability is by reducing the time it takes the transmission line protection scheme to identify and resolve a fault or isolate the faulty section of the line. In this paper, the existing electromechanical protection scheme is replaced with an intelligent solid state-based protection scheme that recognizes faulty conditions early enough and isolates faulty sections of the line with a higher speed. This protection scheme was realized using Artificial Neural Network (ANN) and Silicon Controlled Rectifier (SCR). The developed scheme was simulated on the Simulink platform and the results shows that the proposed intelligent solid state-based protection scheme not only improved the protection of the test network by shortening the clearing time from 0.02 seconds to 0.01 seconds but also detects faults early enough before it causes any harm hence ensuring a well protected system.