Differential Positive Sequence Impedance-Based Transmission Line Protection Scheme

Abstract

In this paper, a new fault detection scheme based on a cumulative sum of differential positive sequence impedance component is presented for the application of relaying in the power system. The performance of the proposed method is tested for various fault conditions that usually occur in a power system by carrying simulations in MATLAB/Simulink. Along with faults at normal operating condition, several faults at extreme operating condition are also investigated to test the superiority of the method. From the simulation studies, it is observed that the proposed method produced acceptable performance in detecting all types of faults at different fault conditions.