A Study on Output Voltage Regulation of Single- Phase Inverter using LMI-based Optimal State Feedback Control

This study adopts a linear matrix inequalities (LMI)-based optimization approach to for-mulate a systematic control design for an LC-filtered single-phase DC-AC inverter. The proposed study’s optimization criteria define the LMI problems to provide fast output voltage response by reducing the time to steady state. Then, the stabilizing control gain is computed based on the LMI…

Resilient Power Control of a Three-Phase Grid-Connected Inverter in the Presence of Uncertain Grid Impedance

Typically, unknown grid impedance in power distribution networks cannot be avoided; therefore, building an effective controller is essential. Furthermore, it is impossible to eliminate the intrinsic parameter uncertainty of the inverter filter. In this study, an AC power grid receives well-regulated power from a DC source using a systematic control method to address these problems.…

LMI-Based Robust Voltage Regulation of a Single-Phase Inverter with LC-Filtered Output

This paper presents a linear matrix inequality-based robust control strategy for a single-phase DC-AC inverter with output LC-filter. An all-pass filter is utilized in this paper to create an artificial β-signal so that the proposed controller can be simply used in dq-synchronous frame. This proposed robust controller utilizes a state feedback control with integral action…

Symmetrical components-based robust stabilizing control of a grid-connected inverter under unbalanced voltage sag

This study presents an approach for robust current and power control for a three-phase grid-connected inverter set up with an L-filter that operates under an unbalanced AC grid-voltage source. This control method consists of two paralleled current control for the positive and negative sequences to accomplish one of three selective control targets: a) supplying balanced…

Robust Tracking Control of a Three-Phase Bidirectional Charger for Electric Vehicle

This paper presents a robust control strategy for an electric vehicle’s three-phase off-board bidirectional AC-DC battery charger. The conventional constant current (CC) and constant voltage (CV) charging mode are considered to provide a fast-charging performance for the batteries. The bidirectional charger also allows using of the vehicle as an energy storage system for the grid…

Robust Power Control of Three-Phase Grid-Connected Inverter

This paper proposes using Linear Matrix Inequality (LMI) for robust controller design in a three-phase grid-connected inverter (GCI). The controller, applied to a three-phase dc-ac inverter, integrates state feedback and error correction within the dq-rotational frame to eliminate offset errors. An LMI-based optimization minimizes settling time despite uncertainties in the L-filter (expressed as resistance and…