Active distribution power system with multi-terminal DC links

Dong Chen, Lie Xu, Wendian Zhang

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Abstract

A fast power restoration operational scheme and relevant stabilizing control is proposed for active distribution power systems with multi-terminal DC network in replacement of the conventional normal open switches. A 9-feeder benchmark distribution power system is established with a 4-terminal medium power DC system injected. The proposed power restoration scheme is based on the coordination among distributed control among relays, load switches, voltage source converters and autonomous operation of multi-terminal DC system. A DC stabilizer is proposed with virtual impedance method to damp out potential oscillation caused by constant power load terminals. The proposed system and controls are validated by frequency domain state space model and time domain case study with Matlab/Simulink.
Original languageEnglish
Number of pages19
JournalIET Renewable Power Generation
Early online date23 Sep 2016
Publication statusE-pub ahead of print - 23 Sep 2016

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Keywords

  • power systems
  • power distribution
  • multi-terminal DC network

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