Open AccessA Robust Frequency Controller based on Linear Matrix Inequality for a Parallel Islanded Microgrid
Author(s) -
Erum Pathan,
Afarulrazi Abu Bakar,
Shamsul Aizam Zulkifi,
Mubashir Hayat Khan,
Haider Arshad,
M. Asad
Publication year - 2020
Publication title -
engineering, technology and applied science research/engineering, technology and applied science research
Language(s) - English
Resource type - Journals
eISSN - 2241-4487
pISSN - 1792-8036
DOI - 10.48084/etasr.3769
Subject(s) - microgrid , voltage droop , control theory (sociology) , controller (irrigation) , linear matrix inequality , matlab , computer science , automatic frequency control , robust control , power (physics) , control engineering , mathematical optimization , mathematics , engineering , control system , control (management) , telecommunications , voltage regulator , physics , electrical engineering , quantum mechanics , artificial intelligence , agronomy , biology , operating system
This paper presents a robust H∞ control technique for an islanded microgrid in the presence of sudden changes in load conditions. The proposed microgrid scheme consists of a parallel connected inverter with distributed generations. When the load is suddenly changed the frequency deviates from its nominal value. The objective is to design a robust frequency droop controller in order to achieve the frequency at nominal values without using any secondary controller and communication systems while improving power sharing accuracy. Small signal modeling of the power system is designed for the formulation of the problem and the H∞ optimal linear matrix inequality technique is applied in order to achieve the objectives. The proposed controller has been tested with the MATLAB/ SimPowerSytem toolbox.