This paper presents a decentralized current control
approach for a nine-phase wind turbine generator. This type of
generator has three different three-phase stators sharing the same
machine yoke and connected to the grid by means of three different
voltage source back-to-back power converters. Due to the
machine configuration, magnetic couplings are present between
the three stators, complicating the design and implementation of
the machine current controllers. Rather than a centralized control
approach, this paper proposes a methodology to design a decentralized
machine control to regulate the active and reactive power
flowing through each stator independently. A complete dynamic
analysis is performed in order to design the controller to reduce
the coupling effects within the machine, while ensuring a proper
dynamic performance. The control strategy is validated through
simulation and experimental results.