Performance Guaranteed Inertia Emulation for Diesel-Wind System Feed Microgrid via Model Reference Control

TL;DR

This paper introduces a model reference control method to emulate precise inertia in diesel-wind microgrids, ensuring guaranteed performance and safety bounds by tracking a frequency response model with parametrical inertia.

Contribution

It proposes a novel inertia emulation strategy using model reference control tailored for diesel-wind microgrids, focusing on mechanical dynamics for guaranteed performance.

Findings

Exact synthetic inertia is emulated successfully.

Guaranteed performance and safety bounds are achieved.

The control strategy effectively tracks the reference model.

Abstract

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.