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Design and fault-operation analysis of a modular cyclic cascade inter-cell transformer (ICT) for parallel multicell converters

Author

Listed:
  • Sanchez, S.
  • Richardeau, F.
  • Risaletto, D.

Abstract

Nowadays, parallel multicell converters including inter cell transformers (ICTs) are usually used in many different conversion systems and with various topologies. In this paper, an analysis of a modular cyclic cascade ICT is presented for nominal and fault operation. The first part of the article presents a pre-design methodology for cyclic cascade ICTs in nominal operation. Afterwards, an analysis of magnetic behaviour during failure operation as imbalance current or case of k disconnected phases will be presented. The aim of this article is to design a cyclic-cascade ICT that is more robust in failure operation. Air gaps (AGs) have been inserted in order to limit this saturation. A concept of compact cyclic-cascade ICT with just a single winding by phase is presented. We will show its principle of realization and 2D fine element simulation in order to validate this concept.

Suggested Citation

  • Sanchez, S. & Richardeau, F. & Risaletto, D., 2017. "Design and fault-operation analysis of a modular cyclic cascade inter-cell transformer (ICT) for parallel multicell converters," Mathematics and Computers in Simulation (MATCOM), Elsevier, vol. 131(C), pages 190-199.
    • Handle: RePEc:eee:matcom:v:131:y:2017:i:c:p:190-199
    DOI: 10.1016/j.matcom.2016.01.004
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