| Title |
A Study on the Voltage Compensation Effect of Superconducting Fault Current Limiters of Non-Fault Lines When a Fault Occurs in the Power Distribution System |
| Authors |
김명현(Myong-Hyon Kim) ; 김진석(Jin-Seok Kim) |
| DOI |
https://doi.org/10.5370/KIEEP.2023.72.4.256 |
| Keywords |
Superconducting Fault Current Limiter; Voltage Sag; Power Distribution System; Protection Coordination |
| Abstract |
Due to the recent increase in the sensitive load of the power system, power quality is becoming important. The voltage drops are part of power quality and the effects of voltage drops have being studied in various sections. This studies are as one of the related studies in the change of the voltage sag by the impedance of superconducting current limiter(SFCL) which compensates the voltage drops when a fault occurs. In this paper, we analyzed the effect of voltage compensation on non-fault lines with various failure locations with multiple impedance cases of SFCL. As a result, the larger impedance of the SFCL shows the greater voltage compensation effect, and it was confirmed that the impedance of the resistor have the greater voltage compensation effect than that of the reactor. In addition, the voltage compensation effect was found across all lines when a fault occurred, and it was checked that the closer fault occurred to the power source, the greater the compensation effect. To analyze the effect of voltage compensation with load distribution, SARFI was calculated according to the case study. The higher effect was found at the concentrated loads at rear compared to the uniform loads, because the large number of customers at the rear of the power line. And this characteristic has contributed positively to SARFI. |