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In this work, an enhanced control method for the grid-tied single-phase inverter in small wind turbines based on PMSG (permanent-magnet synchronous generator) under grid voltage distortion is introduced. Composite observers are designed for decomposing harmonic and fundamental components of the grid current and voltage accurately, which facilitate current control action and synchronize the inverter...
This paper proposes a robust control scheme for the grid-connected single-phase converter of small permanentmagnet synchronous generator (PMSG) wind turbines under distorted grid voltages. The single-phase grid current is controlled to be sinusoidal by eliminating the high-order harmonic components. For this, the fundamental and high-order harmonic components of the grid voltage and current are extracted...
In this paper, a novel control scheme to mitigate the grid current distortion due to grid voltage disturbance is proposed for a grid-connected voltage-source converter (VSC) with inductor-capacitor-inductor (LCL) filters. Voltage unbalance and harmonics in three-phase systems cause the DC-link voltage ripples and the grid current distortion. In order to mitigate the input current distortion and the...
This paper proposes a new control scheme of a vector-controlled induction machine (IM) drives in overmodulation range to maximize the voltage utilization of the voltage-source inverter. For an operation in overmodulation region, a modified voltage reference is generated for the space-vector pulsewidth modulation (SVPWM). The harmonic current components in the feedback currents needs to be eliminated...
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