Abstract

In this paper, different voltage injection schemes for dynamic voltage restorers (DVRs) are analysed with particular focus on the methods used to minimize the rating of the voltage source converter (VSC) used in DVR. The control and operation of a DVR is demonstrated with reduced rating VSC. The reference load voltage is estimated using the unit vectors and the synchronous reference frame (SRF) theory is used for the control of DVR. The compensations of sag, swell and harmonics in supply voltage using the reduced rating DVR are demonstrated using MATLAB with its Simulink power system blockset (PSB) toolboxes.

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