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Non-sinusoidal back electromagnetic forces cause torque ripple in permanent magnet synchronous motors. These harmonics should be reduced by means of an appropriate current control to improve performance. Good results have been obtained with linear regulators such as repetitive controllers in synchronous reference frame (SRF) and resonant controllers in stationary frame. Repetitive controllers present...
This paper presents design and implementation of a Shunt Active Filters (SAF) for aircrafts power networks using an accurate wide-band current control method based on Iterative Learning Control (ILC). The SAF control system is designed to compensate harmonic currents, within a 400 Hz supply voltage. This work introduces useful design strategies to increase the error-decay speed and improve the robustness...
This paper introduces a new technique for the distributed voltage and frequency control of the local ac-grid in off-shore wind farms based on synchronous generators. The proposed control technique allows the connection of the off-shore wind farm using a diode based HVDC rectifier. The system comprising the wind farm and the diode HVDC rectifier can be operated in current or voltage control mode. Fault...
The article focuses on control strategies of single-phase two-stage grid connected photovoltaic (PV) generation systems. The principle and digital implementation of instantaneous current control, based upon the parameters of the inverter, is presented. This method can be used to achieve accurate tracking results and lower Total Harmonic Distortion (THD) of current. A novel Phase Locked Loop (PLL)...
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