Partially Rated Power Flow Control Converter Modeling for Low Voltage DC Grids

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Abstract

Scalable and robust low voltage direct current distribution (lvdc) networks require solutions allowing flexible power flow control and reliable short-circuit protection. In this paper, the continuous full-order large and small signal models of a partially rated power flow control converter (PFCC) are derived utilizing the generalized averaging method. The large signal model of the PFCC is coupled with a model of the lvdc grid. Due to the state-space representation the combined model of the PFCC and the lvdc grid is suitable for easy algorithmization, and efficient simulation. These advantages make them essential tools for studying and optimizing of scalable lvdc systems with decentralized power flow control based on the PFCC. The PFCC models provide insights into controller design and stability analysis. The models are experimentally validated, and the functionality of the PFCC is demonstrated in a laboratoryscale microgrid.
Original languageEnglish
Number of pages15
JournalIEEE Journal of Emerging and Selected Topics in Power Electronics
DOIs
Publication statusE-pub ahead of print - 2019

Keywords

  • direct current
  • low-voltage
  • modeling
  • microgrid
  • power flow control

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