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Tank circuiting of 3-pole PV based DC microgrid for pole-to-pole voltage balancing

Tank circuiting of 3-pole PV based DC microgrid for pole-to-pole voltage balancing

Giwa, Babatunde 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: 54th International Universities Power Engineering Conference 2019 in Romania. IEEE, pp. 1-6. (In Press)

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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: 54th International Universities Power Engineering Conference 2019 in Romania
Uncontrolled Keywords: Tank Circuit (TC), distributed-PWM, DC-link, PV, DC microgrid, VSC, pole
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Faculty / Department / Research Group: Faculty of Engineering & Science
Faculty of Engineering & Science > Department of Engineering Science
Related URLs:
Last Modified: 31 Oct 2019 13:04
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
Selected for GREAT 2019: None
URI: http://gala.gre.ac.uk/id/eprint/25285

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