| Title |
Coordinated MPC-Based Voltage Control in Low-Voltage Distribution Networks Considering PV Curtailment and BESS Operation |
| Authors |
임준수(Joonsu Im) ; 김진성(Jin Sung Kim) ; 강모세(Moses Kang) ; 김청훈(Chunghun Kim) |
| DOI |
https://doi.org/10.5370/KIEE.2026.75.9.2342 |
| Keywords |
Model Predictive Control (MPC); Battery Energy Storage System (BESS); Photovoltaic Generation (PV); Voltage Regulation; CYME- Python Co-simulation |
| Abstract |
This paper proposes a photovoltaic-battery energy storage system (PV?BESS) coordinated control strategy for voltage regulation in a weak low-voltage distribution network under topology-changing fault conditions. The proposed method is formulated as a multi-objective model predictive control (MPC) problem that simultaneously determines the active power command of the BESS and the output command of PV. The objective function considers voltage regulation, battery degradation cost, price-based energy transaction cost, PV curtailment cost, and control smoothing. To reflect the voltage response of the target node under network topology changes, a Generalized LinDistFlow (GLDF)-based voltage sensitivity model is incorporated into the voltage prediction model. The control performance is evaluated through a CYME-Python co-simulation platform using a two-stage load-flow procedure at each simulation step. Three operating cases are compared: BESS-only control with the original BESS specification, PV?BESS coordinated control with the original BESS specification, and PV?BESS coordinated control with half BESS capacity. Simulation results show that the proposed coordinated control reduces voltage variations during fault conditions by using PV output control as an additional voltage regulation resource. In particular, the coordinated strategy maintains voltage regulation performance even when the BESS capacity is reduced, indicating that PV output adjustment can partially compensate for limited BESS capacity. These results demonstrate that PV?BESS coordinated control can improve voltage stability under fault conditions and may also be considered as a factor in BESS capacity planning in low-voltage distribution networks. |