A New Adaptive PMU based protection scheme for interconnected transmission network system

This paper proposes a new adaptive phasor measurement unit (PMU) based protection scheme for wide area interconnected transmission lines network. This method uses positive sequence voltage and current phasors at both ends of a transmission line to determine the faulted area on the transmission line. The DFT (discrete Fourier transform) is used to compute the phasors of voltages and currents. High accuracy in fault location is achieved by using PMUs placement over a wide area measurement transmission system. This scheme gives the overall snapshot of the system by time synchronizing the data from all remote stations by using communication channel. The conventional system is not able to satisfy the time-synchronized requirement of power system. Phasor Measurement Unit (PMU) is enabler of time-synchronized measurement, it communicate the synchronized local information to remote station. This paper features simulation of interconnected network system for 220 KV line using MATLAB Simulink.