Fault Detection in Transmission Lines Using Three-Phase Instantaneous Active Power and Moving Average

When a fault occurs in transmission line, first it should be detected, then the type of the fault should be recognized and in final step, location of the fault should be estimated. Fault detection as fast as possible helps to do the whole procedure faster. In this paper, a novel method for transmission line fault detection based on three-phase instantaneous active power and moving average technique is proposed. Three-phase instantaneous active power signal is the total of instantaneous active power for each phase. This signal is constant during normal operation of the network but in fault situation, some changes will happen and by utilization of moving average concept, the fault can be detected. The proposed fault detection method is evaluated in five different systems and the results denote the high accuracy and quickness of the proposed approach. For validation of the suggested method, a comparison is carried out with seven similar previous methods.