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This paper presents low computation algorithms for single phase integration of permanent magnet generators associated with a wind turbine emulator test-rig. The grid synchronisation and grid side control are performed by Second Order Generalised Integrators (SOGI). A SOGI-FLL (frequency locked loop) was used for robust, accurate and low computation single phase grid synchronisation. Proportional-Resonant...
In this paper, losses in a 4-kVA three-phase voltage-sourced inverter designed to drive an induction machine, are investigated. A comparison of inverter losses with sinusoidal pulsewidth modulation (PWM), space vector PWM and discontinuous PWM (DPWM) is presented, concluding that DPWM is the method of choice. These PWM schemes are implemented using a field-programmable gate array and modeled in Pspice...
The Brushless Doubly-Fed Machine (BDFM) is attractive for use in wind turbines, especially offshore, as it offers high reliability by virtue of the absence of brushgear. Critical issues in the use of the BDFM in this role at a system level include the appropriate mode of operation, the sizing of associated converter and the control of the machine. At a machine level, the design of the machine and...
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