Next Article in Journal
Multi-Objective Optimization of the Envelope of Building with Natural Ventilation
Previous Article in Journal
Methodical Aspects of Biogas Production in Small-Volume Bioreactors in Laboratory Investigations
Previous Article in Special Issue
Dynamic Programming-Based Vessel Speed Adjustment for Energy Saving and Emission Reduction
Article Menu
Issue 6 (June) cover image

Export Article

Open AccessArticle
Energies 2018, 11(6), 1382; https://doi.org/10.3390/en11061382

A Robust Suboptimal Current Control of an Interlink Converter for a Hybrid AC/DC Microgrid

Department of Electrical and Information Engineering, Seoul National University of Science and Technology, Seoul 01811, Korea
*
Authors to whom correspondence should be addressed.
Received: 23 April 2018 / Revised: 24 May 2018 / Accepted: 25 May 2018 / Published: 29 May 2018
Full-Text   |   PDF [1026 KB, uploaded 29 May 2018]   |  

Abstract

A hybrid AC/DC microgrid is established with the aim of exploiting numerous types of renewable energy to meet the needs of different loads. The microgrid is decomposed by AC DC sub-grids which are connected by an interlink converter (IC). To maintain the security and reliability of the microgrid, an automatic controller for the interlink converter is needed. In this paper, we propose a Linear Matrix Inequalities (LMI)-based current control method for the interlink converter. As the main features here, the interlink converter permits bidirectional power exchange between both sub-grids when a power–demand imbalance occurs in one sub-grid regardless of the converter system parameters. Simulations with various filter parameters are performed using the Matlab/Simulink software to validate the effectiveness of the proposed controller. In comparison with the existing Linear Quadratic Regulator (LQR)-based current control, the proposed method is more robust against unknown system parameters and high load perturbation. View Full-Text
Keywords: bidirectional AC-DC converter; current control; hybrid microgrid; interlink converter; LQR bidirectional AC-DC converter; current control; hybrid microgrid; interlink converter; LQR
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Fitri, I.R.; Kim, J.-S.; Song, H. A Robust Suboptimal Current Control of an Interlink Converter for a Hybrid AC/DC Microgrid. Energies 2018, 11, 1382.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Energies EISSN 1996-1073 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top