Distributed Coordinated Voltage Control for Distribution Networks With DG and OLTC Based on MPC and Gradient Projection

This paper proposes a distributed coordinated voltage control scheme for distribution networks with generation (DG) and on-load tap changer (OLTC). In this scheme, static synchronous compensators (STATCOMs), DG units OLTC are to regulate voltages of all buses be close the nominal value in network, mitigate fluctuations, minimize number operations while considering different temporal characteristics regulation devices. The optimization problem coordinating STATCOMs is decomposed by gradient projection (GP) method. local controller optimizes reactive power outputs DGs according measurements, still achieves optimal coordination STATCOMS decentralized manner without central or communication between controllers. designed correct long-term deviations based on model predictive (MPC) minimizing operations. controllers send calculated references controller, which mitigates computation burden. A network two 20 kV feeders 8 was used validate performance proposed scheme.