| Title |
An Improved Algorithm of Fault Indicator Generation of FRTU in Distribution Automation System |
| Authors |
서정수(Seo, Jung-Soo) ; 김형승(Kim, Hyung-Seung) ; 임성일(Lim, Seong-Il) ; 최면송(Choi, Myeon-Song) ; 이승재(Lee, Seung-Jae) |
| DOI |
https://doi.org/10.5370/KIEE.2014.63.10.1354 |
| Keywords |
Distribution Automation System ; Fault Indication ; Fault Indicator ; FI |
| Abstract |
In this paper, an improved method of fault indicator generation algorithm in FRTUs is proposed for the present Distribution Automation System. In order to find fault area, correct FI information should be generated. But when a single line-to-ground fault occurs, FI information is generated in downside of the fault in some circumstance because existing FI algorithm considers only magnitude. It is found that the upside fault current direction if different from the downside fault current direction. Therefore, in order to prevent to generate the wrong fault indication information for FRTU at the downside of the fault, an improved fault indication generation method is developed. Not only the basic conditions are taken into account, but also the directions from the angle difference between zero and positive sequence currents are considered to generated the fault indication information. In case study, the proposed method has been testified and shown the reasonability in generating correct the fault indication information, for many kinds of faults according to conditions. |