Negative Sequence Current Analysis of Single-phase Disconnection Fault in Ungrounded System
It is easily ignored that part of load current will be lost after an overhead line of distribution network encounters a single-phase disconnection fault.By establishing an electromagnetic transient simulation model for distribution network disconnection faults and analyzing the characteristics of line voltage and current changes after the occurrence of single-phase disconnection faults,a new method for analyzing single-phase disconnection faults in distribution networks based on negative sequence current is proposed.The simulation results show that the adoption of the proposed method in analyzing feature quantities for single-phase broken line fault can achieve good reliability and sensitivity.
distribution networksingle-phase disconnection faultnegative sequence current