A New Approach for Fault Estimation Occurring in Transmission System Using Soft Computing Technique

A vital attribute of electrical power network is the continuity of service with a high level of reliability. This motivated many researchers to investigate power systems in an effort to improve reliability by focusing on fault detection, classification and localization. In this paper a new approach to fault location for double-circuit transmission lines based on only the voltage data of both ends of the faulted circuit is described. The ratio between the magnitudes of negative- sequence voltages measured at both ends of the faulted circuit is utilized to estimate the fault location and a fuzzy logic based algorithm to classify the unsynchronized faults for three phase double circuit transmission lines has been developed. To demonstrate the effectiveness of this method, simulations considering various operating conditions have been performed on MATLAB. The results show that proposed technique is capable of right tripping action and classification of type of fault therefore can be employed in practical applications.