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Performance of the brushless doubly-fed machine under normal and fault conditions

Tohidi, S ; Sharif University of Technology | 2012

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  1. Type of Document: Article
  2. DOI: 10.1049/iet-epa.2012.0101
  3. Publisher: 2012
  4. Abstract:
  5. In this study, the steady-state operation of the brushless doubly-fed machine (BDFM) in various modes is physically elaborated and the active power flow and torque analysis are presented for each operating mode alongside confirmatory experimental results on a 4/8 pole D160 size machine. The machine behaviour in asynchronous operating modes is described similar to the conventional induction machines with corresponding pole numbers. Moreover, its performance in synchronous mode is shown to be similar to synchronous machines. On the basis of the above, the BDFM performance is further analysed under two possible fault conditions: first, a controller or converter fault leading to loss of synchronism is considered, where the asynchronous, double-cascade mode must be introduced to describe the machine performance. Second, a voltage dip at the mains terminal is considered. The simplistic behaviour of the BDFM during this fault, including the operation of a converter protective crowbar, is investigated using steady-state torque-speed curves to obtain a general view of the machine performance
  6. Keywords:
  7. Active power flow ; Brushless doubly fed machines ; Converter faults ; Fault conditions ; Induction machines ; Loss of synchronism ; Machine performance ; Operating modes ; Pole numbers ; Steady-state operation ; Synchronous machine ; Torque analysis ; Torque-speed ; Voltage dip ; Synchronous machinery ; Poles
  8. Source: IET Electric Power Applications ; Volume 6, Issue 9 , Volume 6, Issue 9 , 2012 , Pages 621-627 ; 17518660 (ISSN)
  9. URL: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6353075