EPE 2018 - DS3c: Power Factor Correction Techniques | ||
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![]() | Analysis of Multi-drive System Performance under Unbalanced Grid Using Different Grid Synchronization Solutions
By Yipeng SONG | |
Abstract: This paper investigates performance of a selective harmonic elimination method utilizing pulse pattern modulation scheme in multi-drive configuration under different unbalance grid conditions, which include both the amplitude-unbalance and angle-unbalance in the three-phase grid voltage. In order to prevent from loss of synchronization during unbalanced events, a Phase Locked Loop (PLL) structure is proposed, and consequently the appropriate firing angle compensation can be applied based on the different PLLs including the Second Order Generalized Integrator (SOGI)-PLL and Dual SOGI (DSOGI)-PLL. The performance of the considered multi-drive system along with different PLL structures is evaluated through simulation and experimental measurements.
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![]() | Dynamic Performance Improvement of Three Phase Shunt Active Power Filter using Predictive Direct Power Control
By Sabir OUCHEN | |
Abstract: This paper proposes a predictive direct power control for shunt active power filter. The main object ofthe proposed strategy is to compensate for undesirable harmonics in the source current and eliminatereactive power, while being characterized by high transient dynamics. The carried out simulations leadto results that clearly demonstrate the effectiveness of the proposed direct power control algorithm interms of current harmonics elimination, active power quality improvement, and reactive powerminimization.
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![]() | Predictive average current control for Power Factor Correction (PFC) across both continuous (CCM) and discontinuous (DCM) conduction modes
By Kevin PRETORIUS | |
Abstract: This paper shows an average current predictive control algorithm for Power Factor Correction (PFC) con- verters operating across all conduction modes, namely Continuous Conduction Mode (CCM), Discon- tinuous Conduction Mode (DCM) and the continuous changing between both operational modes known as Mixed Conduction Mode (MCM). The proposed control software allows for the bumpless transfer between conduction modes and large input voltage range. No conduction mode detection or duty-cycle feed-forward selection is required as in other typical PFC control schemes. The proposal is simplified to an arithmetic ideal feed-forward duty cycle calculation based on measured current and voltage samples.
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