Control of parallel multiple converters for direct-drive permanent-magnet wind power generation systems

Zhuang Xu, Rui Li, Hui Zhu, Dianguo Xu, C. H. Zhang

Research output: Journal PublicationArticlepeer-review

65 Citations (Scopus)

Abstract

This paper proposes control strategies for megawatt-level direct-drive wind generation systems based on permanent magnet synchronous generators. In the paper, a circulating current model is derived and analyzed. The parallel-operation controllers are designed to restrain reactive power circulation and beat-frequency circulation currents caused by discontinuous space-vector modulation. The control schemes do not change the configurations of the system consisting of parallel multiple converters. They are easy to implement for modular designs and large impedance required to equalize the current sharing is not needed. To increase the system reliability, a robust adaptive sliding observer is designed to sense the rotor position of the wind power generator. The experimental results proved the effectiveness of the control strategies.

Original languageEnglish
Article number5986731
Pages (from-to)1259-1270
Number of pages12
JournalIEEE Transactions on Power Electronics
Volume27
Issue number3
DOIs
Publication statusPublished - 2012
Externally publishedYes

Keywords

  • Circulation currents
  • parallel multiple converters
  • permanent magnet synchronous generators (PMSGs)
  • wind power

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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