PERFORMANCE ANALYSIS OF A 10-MW WIND TURBINE HTS GENERATOR UNDER STATOR UNBALANCED CONDITIONS

Rouhollah Shafaei and Fatemeh Amirkhanloo

Keywords

Finite-element method (FEM), internal windings fault, high-temperature superconducting (HTS) generator, power quality, unbalanced loading, wind turbine HTS synchronous generator

Abstract

As wind turbines are installed in grid or islanding modes, its generator should be capable in continuously working under different operating conditions, specially transient and unbalanced loading conditions. In this paper, a thorough performance analysis is carried out for a large-scale wind turbine high-temperature superconducting synchronous generator (HTSSG) under different transient operating conditions. As wind turbines are supposed to provide a reliable and stable power quality, the generator should be capable to work under different fault conditions. The proposed HTS generator is modelled and simulated under different transient conditions, including unbalanced loading and stator windings internal fault (turn-to-ground and turn-to-turn) conditions, using numerical equations by proper finite-element method (FEM) modelling. The generated voltage and current variations and their harmonics as well as magnetic flux density analysis under different studied conditions are analysed and discussed. It is shown that the proposed HTS generator can provide a reliable performance either in unbalanced or internal windings fault conditions so that the proposed generator is able to continue its operation under the studied fault conditions. Simulation results show proper electromagnetic design of the proposed 10-MW-class HTS generator and confirm its desirable performance as large-scale wind turbine generators.

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