Adaptive DC stabilizer with reduced DC fault current for active distribution power system application

Dong Chen, Lie Xu, James Yu

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Abstract

This paper takes a systematic view on the control and protection of\ medium power DC networks in an active distribution power system considering fault current limiting, system control, and converter design. Reduced terminal capacitance and extra DC impedance are used to limit DC fault current and reduce the required converter current rating for medium power DC networks. An adaptive DC power stabilizer is proposed to alleviate possible system instability brought by the fault current limiting settings in the presence of constant power load. The effect of the current limiting method and the proposed stabilizer on DC fault current and stability enhancement are validated by simulation studies using a simple two-converter DC network and a multi terminal DC network in an active distribution power system.
Original languageEnglish
Pages (from-to)1430-1439
Number of pages10
JournalIEEE Transactions on Power Systems
Volume32
Issue number2
DOIs
Publication statusPublished - 19 May 2016

Keywords

  • active distribution power system
  • DC microgrid
  • DC power system
  • DC protection
  • DC stabilizer

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