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Multi-voltage level operation of DC loads in 3-pole PV-based DC microgrid

Multi-voltage level operation of DC loads in 3-pole PV-based DC microgrid

Giwa, Babatunde ORCID: 0000-0001-5178-072X and Habtay, Yehdego (2019) Multi-voltage level operation of DC loads in 3-pole PV-based DC microgrid. In: The International Conference on Energy and Sustainable Futures (ICESF) 2019. Nottingham Trent University, Nottingham, United Kingdom. ISBN 978-1912253029

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Abstract

This paper proposes the concept of operating approximately equal distributed dc loads and flexible dc load respectively on low and high voltage levels without the employment of dc-dc converter in 3-Pole PV-based DC Microgrid (3-PPDM). The concept leverages on the two-equal centre-tapped capacitors on the dc link of PV generation system embedded to the grid via single-stage dc link and three-level Voltage Source Converter (3L-VSC), where three connecting poles (+P,gP,-P) are obtained for load connections. The essence of the concept is to reduce implementation cost by eliminating the use of dc-dc converters and still achieve desirable performance of the dc loads. The challenge of this concept during zero insolation which leads to violation of the set conditions for desirable operation of the microgrid was mitigated with the employment of modified Perturb & Observe Maximum Power Point Tracking (P & O MPPT) technique where zero output current of the PV is considered. Evaluation of the concept and modified P & O MPPT algorithm were carried out in MATLAB/Simulink and simulation results showed that the system performance is comparable to alternative approach, but with reduced number of components required for the microgrid implementation and significant reduction in complexity of the microgrid operation.

Item Type: Conference Proceedings
Title of Proceedings: The International Conference on Energy and Sustainable Futures (ICESF) 2019
Uncontrolled Keywords: 3-pole PV-based DC microgrid, 3L-VSC, P&O MPPT
Subjects: T Technology > TD Environmental technology. Sanitary engineering
Faculty / Department / Research Group: Faculty of Engineering & Science
Faculty of Engineering & Science > School of Engineering (ENN)
Related URLs:
Last Modified: 19 Sep 2020 00:20
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
Selected for GREAT 2019: None
Selected for REF2021: None
URI: http://gala.gre.ac.uk/id/eprint/27287

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