MPC-based Double-Stage Voltage Control of Distribution Networks with High Penetration of Distributed Generation

This paper presents a double-stage voltage control method based on model predictive control to address the voltage regulation in distribution network with high penetration of distributed generation. In the first stage, the operation times of transformer with on-load tap changer and switchable capacitor banks are minimized in hourly timescale. In the second stage, the controller minimizes the distributed generation curtailment while guaranteeing bus voltages within allowed limits with a control period of 1 min. In this paper, an analytical method is applied to calculate the voltage sensitivities with respect to power injections and tap changes. Numerical simulations of a modified IEEE-33 bus system are performed to validate the proposed method.