This paper proposes a novel fault location method for overhead feeders,which is based on the direct load flow ap-proach.The method is developed in the phase domain to effec-tively deal with unbalanced network conditio...This paper proposes a novel fault location method for overhead feeders,which is based on the direct load flow ap-proach.The method is developed in the phase domain to effec-tively deal with unbalanced network conditions,while it can al-so handle any type of distributed generation(DG)units without requiring equivalent models.By utilizing the line series parame-ters and synchronized or unsynchronized voltage and current phasor measurements taken from the sources,the method reli-ably identifies the most probable faulty sections.With the aid of an index,the exact faulty section among the multiple candi-dates is determined.Extensive simulation studies for the IEEE 123-bus test feeder demonstrate that the proposed method accu-rately estimates the fault position under numerous short-circuit conditions with varying pre-fault system loading conditions,fault resistances,and measurement errors.The proposed meth-od is promising for practical applications due to the limited number of required measurement devices as well as the short computation time.展开更多
基金supported by the Hellenic Foundation for Research and Innovation(HFRI)under the HFRI Ph.D.Fellowship grant(No.1156)。
文摘This paper proposes a novel fault location method for overhead feeders,which is based on the direct load flow ap-proach.The method is developed in the phase domain to effec-tively deal with unbalanced network conditions,while it can al-so handle any type of distributed generation(DG)units without requiring equivalent models.By utilizing the line series parame-ters and synchronized or unsynchronized voltage and current phasor measurements taken from the sources,the method reli-ably identifies the most probable faulty sections.With the aid of an index,the exact faulty section among the multiple candi-dates is determined.Extensive simulation studies for the IEEE 123-bus test feeder demonstrate that the proposed method accu-rately estimates the fault position under numerous short-circuit conditions with varying pre-fault system loading conditions,fault resistances,and measurement errors.The proposed meth-od is promising for practical applications due to the limited number of required measurement devices as well as the short computation time.
