Giwa, Babatunde A. ORCID: 0000-0001-5178-072X and Habtay, Yehdego (2019) Tank circuiting of 3-pole PV based DC microgrid for pole-to-pole voltage balancing. In: 2019 54th International Universities Power Engineering Conference (UPEC). IEEE, pp. 1-6. ISBN 978-1728133492 (doi:https://doi.org/10.1109/UPEC.2019.8893547)

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Abstract

This paper focuses on the regulation of pole-to-pole voltage in 3-Pole PV Based DC Microgrid (3-PPDM). This type of microgrid is conceived to mimic in dc microgrid, the operational feature of grid-connected three-phase ac microgrid where no transformer is required at distribution level for the provision of different voltage levels (phase and line) operation within the ac microgrid. 3-PPDM is developed with PV Based DC Microgrid connected to ac grid via single stage dc link and 3-Level Voltage Source Converter (3L-VSC). Operation of distributed flexible dc loads at lower voltage level on the dc link without dc-dc converters cause voltage imbalance among poles. This imbalance violates the technical constraints for desirable operation of both the 3L-VSC and distributed dc loads. Distributional effects of this violation are reduction in dc link voltage and grid parameters (voltage and current) qualities. Consequently, distributed Pulse Width Modulation (d-PWM) based algorithm was developed together with a 2-in-1 Tank Circuit (TC) to regulate this imbalance under slowly/rapidly varying irradiance by bringing the voltage differential among poles nearly to zero. The simulation results obtained under rectification and inversion operational mode of 3L-VSC show marginal improvement in dc link voltage and grid current qualities at reduced operational cost.

Item Type:	Conference Proceedings
Title of Proceedings:	2019 54th International Universities Power Engineering Conference (UPEC)
Uncontrolled Keywords:	Tank Circuit (TC), distributed-PWM, DC-link, PV, DC microgrid, VSC, pole
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Faculty / School / Research Centre / Research Group:	Faculty of Engineering & Science Faculty of Engineering & Science > School of Engineering (ENG)
Last Modified:	02 Dec 2019 09:05
URI:	http://gala.gre.ac.uk/id/eprint/25285

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