FAULT LOCATION METHOD FOR DISTRIBUTION NETWORK BASED ON PMU AND FI
This article proposes a fault location method for distribution networks based on the characteristics and advantages of two measurement devices:fault indicators(FIs)and phasor measurement units(PMUs).Firstly,a relationship matrix is established based on the power system's network topology.The alarm vector is constructed using the alarm information from the FIs and the fault current direction,and the fault section is determined by solving the correspondence between the two.Secondly,the data of the voltage and current at both ends of the fault section are estimated by combining the PMU-configured node data and line parameters.Finally,the external circuits of the fault section are equivalently represented,and depending on the completeness of the node data,either the single-end impedance method or the double-end impedance method is selected to determine the fault distance,achieving accurate fault location.The simulation results show that the proposed method achieves high accuracy in short-circuit fault location under different fault locations,fault types,and transition resistance values.
power distribution networksfault locationphasor measurement unitsfault section locationfault indicators
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