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This paper focuses on a three-level pulse width modulation (PWM) rectifier with direct power control (DPC) strategy based on switching table. The influences of power control coupling on system performances are analyzed and an optimized three-level DPC strategy is developed. The proposed three-level DPC changes the selection of control vectors dynamically according to the location of grid voltage vector...
This paper investigates the energy interfaces in three-level pulse width modulation (PWM) rectifier and proposes a novel direct power control (DPC) strategy. An optimized three-level switching table with high power regulation intensities is constructed in order to improve the tracking capabilities of power loops. An energy regulator is designed based on the power equations of the energy interfaces...
This paper focuses on a three-level pulse width modulation (PWM) rectifier using direct power control (DPC) strategy, analyzes the relationship between the input power source voltage, the output dc voltage and the switching table, and presents the key-point which limits the input voltage range of the rectifier. A novel DPC strategy with wide input voltage range for three-level PWM rectifier is proposed...
A novel direct power control (DPC) strategy for three-level neutral-point-clamped (NPC) pulse-width-modulation (PWM) rectifier, based on fixed synthesizing vectors, is proposed in this paper. The strategy breaks through the restrictions of vector switching with a simple switching table, improves the excellent dynamic performance of DPC, avoids the neutral-point voltage unbalance and the excessive...
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