| Title |
A Fault Indicator Generation Algorithm using Phase Angle of Zero-Sequence Current in Ungrounded System |
| Authors |
임희택(Lim, Hee-Taek) ; 임일형(Lim, Il-Hyung) ; 최면송(Choi, Myeon-Song) ; 이승재(Lee, Seung-Jae) |
| Keywords |
Distribution System ; Distribution Automation ; Ungrounded System ; FI ; Fault Indicator ; Zero-Sequence Current |
| Abstract |
Most faults are single-phase-to-ground fault in ungrounded system. The fault currents of single-phase-to-ground are much smaller than detection thresholds of measurement devices, so detecting single-phase-to-ground faults is difficult and important in ungrounded system. This paper proposed to a FI(Fault Indicator) generation algorithm in ungrounded system. The algorithm just using line-to-line voltage and zero-sequence current detects fault line, fault phase, fault section and FI(Fault Indicator) at terminal device, This paper also proposed to application plan for this algorithm. In the case study, the proposed algorithm has been testified in demo system by Matlab/Simulink simulations. |