Primary frequency regulation for multi-area interconnected power system with wind turbines based on DMPC

Abstract

This paper integrates the wind turbines (WTs) into the interconnected power system and designs a distributed model predictive control (DMPC) controller for the primary frequency regulation problem. The WTs have been treated as a part of the power system to take part in primary frequency regulation with load disturbances. A frequency response model of multi-area power system including WTs is introduced, in which the physical constraints of the governors and turbines are considered. The distributed model predictive controller is designed by posing the primary frequency regulation problem as disturbance rejection problem of large system with state and input constraints. Analysis and simulation results for a two-area interconnected power system with WTs show possible improvements on closed-loop performance, while respecting physical hard constraints. Comparisons have been made made between the DMPC controller with and without WTs. The results confirm the superiority of the proposed DMPC scheme with the participation of the wind turbines in the primary frequency regulation.