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Development of methods and tools for the design and optimisation of Brushless Doubly-Fed Induction Machines for variable speed application in Hydro-generation

Abstract : Pumped-hydro storage plants (PSP) are important assets to stabilize electric grids.Variable speed technologies can improve the cycle efficiency and the power adjustability of PSPs. Current technologies such as fully-fed machines or Doubly-Fed Induction Machines (DFIM) have drawbacks. In this work, the focus will be on an unconventional design of variable speed machine: the Brushless Doubly-Fed Induction Machine (BDFM). The objectives are to better understand the working principles of this machine so as to size it, optimize it, and compare it to other types of variable speed machines.Following a review of sizing and optimization techniques for conventional machines, similar approaches are investigated for BDFMs. Two different methods for faster Finite-Element (FE) simulations of the BDFM are presented: a fast one without saturation considerations and another one based on the principle of magneto-harmonic simulations. A careful harmonic analysis combined with a comparison of cross-coupling tests between FE simulations and results of equivalent circuit found in the literature will lead to a modification of the BDFM equivalent circuit. A new method to determine the parameters of thisequivalent circuit from electrical tests is presented. The parameters determination from the geometry will also be considered for the elaboration of a derivable semi-analytical model. Such a model, paired with a 1st order optimization algorithm could be extremely powerful during the sizing of a BDFM. The potential of such an approach is shown in this work with the optimization of an Induction Machine.
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https://tel.archives-ouvertes.fr/tel-01883608
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Submitted on : Friday, September 28, 2018 - 2:01:07 PM
Last modification on : Wednesday, October 14, 2020 - 4:18:51 AM
Long-term archiving on: : Monday, December 31, 2018 - 9:59:27 AM

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Nicolas Moisson Franckhauser. Development of methods and tools for the design and optimisation of Brushless Doubly-Fed Induction Machines for variable speed application in Hydro-generation. Electric power. Université Grenoble Alpes, 2018. English. ⟨NNT : 2018GREAT031⟩. ⟨tel-01883608⟩

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