Design of Bipolar Interface Converter for Purely DC Microgrid with Minimally Processed Maximum Power Point Operation of Photovoltaics

Sanchit Mishra, Visweshwar Chandrasekaran, T. Sreekanth, Ned Mohan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Bipolar microgrids are important candidates for the design of upcoming purely DC or islanded systems due to the extra resiliency offered by the multi-bus (±190V) system. However, unbalanced loads may be connected to the bipolar buses which makes voltage control for power balance essential for the converter. Dual secondary winding based Dual Active Bridge converter, with output series connection, offers a viable solution due to its inherent galvanic isolation between the source and the loads. To harvest the maximal energy from a series connection of photovoltaics (PV) it is important to continuously operate the system at the maximal power point (MPPT). To ensure low losses and higher energy yield over time, differential power processing based converters can be integrated to the PV modules such that minimum power is processed to achieve MPPT. This work provides a solution for interfacing the unipolar power source to a bipolar load bus, to which loads of two different voltage requirement (±190V or +380V) can be connected by incorporating voltage control in the same converter that interface unipolar voltage bus to bipolar bus.

Original languageEnglish (US)
Title of host publication2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages2650-2657
Number of pages8
ISBN (Electronic)9781728103952
DOIs
StatePublished - Sep 2019
Event11th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2019 - Baltimore, United States
Duration: Sep 29 2019Oct 3 2019

Publication series

Name2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019

Conference

Conference11th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2019
CountryUnited States
CityBaltimore
Period9/29/1910/3/19

Keywords

  • Bipolar microgrid
  • Differential power processing
  • Dual active bridge
  • Magnetics
  • Photovoltaics

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    Mishra, S., Chandrasekaran, V., Sreekanth, T., & Mohan, N. (2019). Design of Bipolar Interface Converter for Purely DC Microgrid with Minimally Processed Maximum Power Point Operation of Photovoltaics. In 2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019 (pp. 2650-2657). [8912231] (2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ECCE.2019.8912231