Performance Guaranteed Inertia Emulation for Diesel-Wind System Feed Microgrid via Model Reference Control
It addresses the challenge of precise inertia emulation in hybrid microgrids to ensure frequency stability, but the approach is incremental as it applies model reference control to a known problem.
This paper proposes a model reference control strategy for inertia emulation in a diesel-wind microgrid, achieving exact synthetic inertia and guaranteed performance with safety bounds.
In this paper, a model reference control based inertia emulation strategy is proposed. Desired inertia can be precisely emulated through this control strategy so that guaranteed performance is ensured. A typical frequency response model with parametrical inertia is set to be the reference model. A measurement at a specific location delivers the information of disturbance acting on the diesel-wind system to the reference model. The objective is for the speed of the diesel-wind system to track the reference model. Since active power variation is dominantly governed by mechanical dynamics and modes, only mechanical dynamics and states, i.e., a swing-engine-governor system plus a reduced-order wind turbine generator, are involved in the feedback control design. The controller is implemented in a three-phase diesel-wind system feed microgrid. The results show exact synthetic inertia is emulated, leading to guaranteed performance and safety bounds.