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This paper presents a novel integrated control scheme for three-level neutral point clamped (NPC) based PWM rectifier-inverter. Two measures are taken to minimize the size of dc-bus capacitors which are expensive, bulky and have a lifetime limit. Firstly, the direct power control (DPC) for front-end three-level PWM rectifier is applied, which will provide better dynamic performance for the dc-link...
In this paper, the model-based direct power controller (DPC) is proposed for a multi-terminal high voltage direct current (HVDC) using Voltage source converter (VSC), which is able to control directly the instantaneous power and reactive power. Moreover, this DPC is able to handle the unbalanced network condition, that is unequal AC voltage due to unbalanced power supplies, unbalanced loads and unavoidable...
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