Analysis Of Dclink Z-Source Control Based Hybrid Active Power Filter
Journal: International Journal of Scientific & Technology Research (Vol.3, No. 4)Publication Date: 2014-04-15
Authors : Paulmathew; Venkatesh. A;
Page : 299-305
Keywords : Keywords Z-source; Hybrid active power filter; real and reactive compensation; voltage and current harmonics.;
Abstract
Abstract This paper investigates different dc-link voltage control strategies in a three-phase four-wire z-source hybrid active power filter Z-source HAPF for reactive power compensation. By using direct current current reference pulse width modulation PWM control method to achieve dc-link voltage self-charging function during Z-source HAPF start-up process the dc-link voltage control signal feedback as reactive current component is more effective than the traditional method as an active current component. However when the Z-source HAPF is performing dynamic reactive power compensation this dc-link voltage control scheme will influence the reactive power compensation and thus makes the Z-source HAPF lack of success to carry out dynamic reactive power compensation. In this paper a novel dc-link voltage control scheme for Z-source HAPF is proposed so that the dc-link voltage control with start-up self charging process can be obtained as well as providing dynamic reactive power compensation. Representative simulation and experimental results of the three-phase four-wire centre-spilt Z-source HAPF are presented to verify all deductions and also show the effectiveness of the proposed dc-link voltage control scheme in dynamic reactive power compensation.
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