NDLI: Decentralised robust T-S fuzzy controller for a parallel islanded AC microgrid

Content Provider	IET Digital Library
Author	Hosseinalizadeh, Teimour Kebriaei, Hamed Salmasi, Farzad Rajaei
Abstract	This study proposes a decentralised robust fuzzy control strategy for islanded operation of an AC microgrid with voltage source inverters. The objective is to design a robust controller for regulating the load voltage and sharing power among distributed generators (DGs) in the presence of uncertainties in the system and non-linear loads. The AC microgrid consists of parallel DGs connected to a main AC bus. A Takagi-Sugeno fuzzy approach is developed in this article to achieve stability and desired performance in dealing with non-linearities in the islanded microgrid and H ∞ criterion is used to obtain a robust control strategy in presence of uncertainties raised by unmodelled and high frequency dynamics. Therefore, a non-convex condition in H ∞ optimisation problem is converted to a convex linear matrix inequality (LMI) condition and is solved by MATLAB LMI toolbox. In order to develop a decentralized system, P–f and Q–V droop controllers are used to specify set-points for local inverter controllers in each DG. The effectiveness of the proposed control strategy in presence of constant power load and DG accidental outage is validated by the simulation of a microgrid test system in MATLAB SimPowerSystems toolbox. Comparison with cascaded proportional integral controller shows advantages of robust T-S controller.
Starting Page	1589
Ending Page	1598
Page Count	10
ISSN	17518687
Volume Number	13
e-ISSN	17518695
Issue Number	Issue 9, May (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/13/9
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2018.5757
Journal	IET Generation, Transmission & Distribution
Publisher Date	2019-01-07
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	AC Bus Algebra Constant Power Load Control of Electric Power System Control System Analysis Control System Synthesis Convex Linear Matrix Inequality Convex Linear Matrix Inequality Condition Decentralised Control Decentralised Robust Fuzzy Control Strategy Decentralised Robust T-S Fuzzy Controller Decentralised System Distributed Generator Distributed Power Generation Distribution Network Droop Controller Fuzzy Control High Frequency Dynamics Invertors Islanded Operation Linear Matrix Inequalities LMI Condition Load Bus Voltage Local Inverter Controller MATLAB LMI Toolbox MATLAB SimPowerSystem Toolbox Microgrid Test System Multivariable Control System Nonconvex Condition Nonlinear Control System Parallel DGs Parallel Islanded AC Microgrid Power Distribution Fault Power Generation Control Power System Control Robust Control Robust Control Strategy Robust Controller Stability in Control Theory Synthesis Method T-S Controller Takagi–Sugeno Fuzzy Approach Voltage Control Voltage Source Inverter
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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