Dynamic Behaviour Based Wide-Area Back-Up Protection of Transmission Lines
This paper proposes a decentralized approach for identification and classification of faults in transmission lines which uses the dynamic behavior of the generators in the power system. After classification of fault, the location of the fault in the transmission line is calculated. In the proposed method, power system is divided into different protection zones (PZ), each protection zone has a generator whose gain in momentum (GIM) is monitored rigorously. With the help of GIM, Sequence Voltage
... , Sequence Voltage Magnitudes at buses and reactive power flow through the transmission lines the faulty transmission line will be identified and the fault is classified. Once the fault is classified with the help of sequence voltages and currents at the either ends of the transmission line fault location is calculated. The fault location algorithm used in the paper doesn't require the knowledge of line parameters which makes it superior over the other existing algorithms. The proposed method is tested on Western System Coordinating Council-9 bus system using power world simulator and PSCAD. The test result indicates that the proposed method is highly effective for Wide Area Back-up Protection of transmission lines.