EngineeringElectrical EngineeringCritical Infrastructure ProtectionFault-tolerant SystemsPower ElectronicsElectrical System DiagnosticsFault DetectionFault DiagnosisPower Grid AnalysisProtection SystemsSmart Grid SystemsCurrentsDistributed GenerationFault LocationFault ProtectionFault Protection SystemsGeneratorsPower System Fault AnalysisRelay Protection
This paper presents an agent based protection scheme to detect and isolate the faults in a distribution system with high penetration of distributed generation. An algorithm that uses wavelet coefficients of the transient fault currents is proposed for the identification of faulted sections. The algorithm is a hybrid of two techniques: one that determines the direction of fault currents based on the sign of wavelet coefficients and the other that estimates the distance to a fault based on the time interval between the travelling waves (and their reflections) arriving from the fault. Studies with a simulated distribution system indicate that the proposed method can correctly recognize the faulty sections.