| Title |
A Study on Open Phase Fault Characteristics of Interconnecting Transformer for PV System Based on PSCAD/EMTDC |
| Authors |
강갑석(Kab-Seok Kang) ; 이후동(Hu-Dong Lee) ; 태동현(Dong-Hyun Tae) ; 노대석(Dae-Seok Rho) |
| DOI |
https://doi.org/10.5370/KIEE.2020.69.2.225 |
| Keywords |
Open Phase Fault; PV System; PSCAD/EMTDC; Reverse Power Flow; Grid-connected Transformer; Iron Core Structure |
| Abstract |
Recently, the installation of renewable energy sources(RES) such as PV system is being rapidly increased according to the Korean government policy of low-carbon green growth. However, when large scale PV systems are installed and operated in distribution system, open phase faults may be occurred at points of common coupling. Specifically, if open phase faults are occurred, the PV system should be stopped by prevention function of islanding of inverter, but it is reported that there are undetected cases for open phase circuit. And also, a phenomenon of open phase circuit may supply reverse power flow in grid-connected transformer.
Therefore, this paper proposes modeling of open phase fault using PSCAD/EMTDC S/W and implements test devices to analyze cause of open phase circuit which is occurred at inverter side of PV system. Based on modeling and test devices, it is confirmed that the proposed methods are useful and practical tools for fault analysis of open phase circuit according to wiring connection and iron core structure in grid-connected transformer. |