| Title |
Real-time Phase-wise Reactive Power Control of SVC for Alleviating Phase Imbalance in Distribution Networks |
| Authors |
이재건(Jae-gun Lee) ; 심성락(Sung-rak Sim) ; 손진근(Jin-geun Shon) |
| DOI |
https://doi.org/10.5370/KIEE.2026.75.5.1196 |
| Keywords |
DSOGI(Dual Second Order Generalized Integrator); Load Unbalance; Reactive Power Control; SVC; TCR; TSC |
| Abstract |
This paper proposes a robust reactive power control method for Static Var Compensator (SVC) systems under input phase variation and load unbalance. Conventional SVCs regulate total reactive power and thus fail to compensate phase-by-phase reactive power when unbalanced conditions occur. To address this limitation, the proposed method employs a Dual Second-Order Generalized Integrator (DSOGI) to extract in-phase and quadrature components of three-phase voltages and currents, enabling accurate phase tracking and per-phase reactive power estimation. The extracted quantities are used to generate independent firing-angle commands for each TCR branch. PSIM simulations and DSP-based experiments verify that the proposed method achieves unity displacement power factor in all phases, outperforming existing control approaches. |