| Title |
Analysis of Voltage Fluctuation Suppression during Induction Motor Startup using Smart Inverter for Fault Current Limiter Application in Power Distribution System |
| Authors |
최승수(Seung-Su Choi) ; 김수현(Su-Hyeon Kim) ; 조영재(Young-Jae Cho) ; 임성훈(Sung-Hun Lim) |
| DOI |
https://doi.org/10.5370/KIEE.2025.74.12.2125 |
| Keywords |
Distributed energy resource (DER); Fault current limiter (FCL); Point of common coupling (PCC); Smart inverter; Voltage stability; Volt/Var control (VVC) |
| Abstract |
As global energy demands rise alongside environmental concerns from fossil fuels, developing renewable energy (RE) is crucial.
However, the increasing integration of distributed energy sources (DERs) like solar PV into distribution systems introduces voltage instability including voltage sags. Smart inverters are advanced grid-connected devices for DERs, capable of regulating output voltage and frequency to support grid stability. Volt/Var control (VVC) of smart inverter mitigates voltage fluctuations by supplying or absorbing reactive power based on the voltage at the smart inverter’s point of common coupling (PCC). In this paper, voltage fluctuation caused by induction motor startup and fault current limiter (FCL) application was investigated, as both significantly degrade power system stability. The effectiveness of smart inverter in suppressing voltage fluctuations and mitigating starting currents was analyzed. Through an experimental case study in a power distribution system, the combined impact of FCL and smart inverter on enhancing voltage stability during induction motor startup was evaluated. |