Fuzzy Controller for Energy Management and SoC Equalization in DC Microgrids Powered by Fuel Cell and Energy Storage Units

This article proposes a coordinated and decentralized control structure for a dc microgrid (MG) powered by fuel cells (FCs) and energy storage units (ESUs). With the employment of ESUs in the dc MG, the balancing among their states of charge (SoCs) increases their lifetimes and improves the dc MG re...

Full description

Saved in:

Bibliographic Details
Published in:	IEEE journal of emerging and selected topics in industrial electronics (Print) Vol. 3; no. 1; pp. 90 - 100
Main Authors:	Fagundes, Thales Augusto, Fuzato, Guilherme Henrique Favaro, Ferreira, Plinio Goncalves Bueno, Biczkowski, Mauricio, Machado, Ricardo Quadros
Format:	Journal Article
Language:	English
Published:	New York IEEE 01-01-2022 The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:	Controllers DC microgrid (MG) Decentralized control Distributed generation Energy management Energy storage energy storage units (ESUs) Equalization equalization method Fuel cells Fuzzy control fuzzy controller Industrial electronics Low pass filters Microgrids Resistance Stability analysis Steady-state Storage units Transient analysis Voltage control
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	This article proposes a coordinated and decentralized control structure for a dc microgrid (MG) powered by fuel cells (FCs) and energy storage units (ESUs). With the employment of ESUs in the dc MG, the balancing among their states of charge (SoCs) increases their lifetimes and improves the dc MG reliability. Assuming the FC as the main source, fast transients of load on the dc link can damage its membrane. In this context, the FC and ESUs show a complementary behavior during the transitory, while the possibility to change the energy shared between the sources at a steady state promotes the energy management system. The SoCs of all ESUs connected to the MG are balanced using a fuzzy controller. Furthermore, a low-pass filter in association with a droop controller can mitigate the stress caused by the fast transients on the FC terminals. The main benefits of using the fuzzy controllers are related to the practical simplicity of implementation and the fact that a high-speed link of communication between the FC and the ESUs is not needed. Additionally, Lyapunov's indirect method performs the stability analysis of the dc MG. Finally, a laboratory-scale prototype evaluates the effectiveness of the proposed approach.
ISSN:	2687-9735 2687-9743
DOI:	10.1109/JESTIE.2021.3088419