Direct Power Control of Three Phase PWM Rectifier based DSOGI-VF Estimator for No-Ideal LineVoltages Conditions
Journal Title: International Journal of engineering Research and Applications - Year 2018, Vol 8, Issue 1
Abstract
In this paper, direct power control (DPC) of three-phase pulse width-modulated rectifiers without line voltage sensors is presented. The new system is based on virtual flux (VF) using dual Second Order Generalized Integrator frequency located loop DSOGI-FLL estimator. In order to improve the VF-DPC performance of PWM rectifier, an improved observation method of virtual flux-linkage is proposed. To avoid the relevant problems of pure integrator, and to achieve the accurate observation of the grid voltage’s phase, (SOGI-FLL) are used to displace the pure integrator. Theoretical principles of this method are discussed. This strategy is also investigated under unbalance and pre-distortion grid. A theoretical analysis of active and reactive power under a non-ideal source is clearly demonstrated. In order to calculate the compensated powers, the extraction of positive, negative, and harmonic sequences of voltage and current is needed and a multiple DSOGI-FLL method is used for rapid and accurate extraction. It is shown that the VFDPC exhibits several advantages, particularly providing sinusoidal line current when the supply voltage is not ideal.
Authors and Affiliations
A. Rahab, F. Senani, H. Benalla
Keywords
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- EP ID EP393329
- DOI 10.9790/9622-0801011018.
- Views 115
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