Abstract
The traditional direct power control of three-phase voltage source PWM rectifier is designed based on the 12 sector division of voltage vector space, and the reactive power will mutate at the beginning of odd sectors. In this paper, the voltage vector space is uniformly divided into 18 sectors. A new switch list is designed by analyzing the influence of the switching vector on the AC side output reactive power and active power of the power control system in different sectors. Through the simulation and analysis can prove that, based on the new direct power switch table control method has good control effect and can improve the power factor and the grid side power quality, reduce the harmonic content of the grid current, and to overcome the traditional switching table defects on reactive power control, reactive power changes more smooth and stable. To get a better static and dynamic control effect.
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