Performance Analysis of Three-Phase DVR with Modified Switching Band Controller
Vasudeva Naidu Pudi1, Srinivasa Rao Sura2, Prasad Bolla3

1Dr Vasudeva Naidu*, Electrical Department, Matrusri Engineering College, Hyderabad, India.
2Dr Srinivas Sura, Electrical Department, GITAM, Vishakhapatnam, India.
3Prasad Bolla, Electrical Department, GITAM, Hyderabad, India.

Manuscript received on October 12, 2019. | Revised Manuscript received on 22 October, 2019. | Manuscript published on November 10, 2019. | PP: 934-941 | Volume-9 Issue-1, November 2019. | Retrieval Number: L26551081219/2019©BEIESP | DOI: 10.35940/ijitee.L2655.119119
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Abstract: This paper deals with the mitigation of voltage related PQ issues by using three phase neutral clamped VSI topology is used to realize the DVR and the design of DVR for the selection of suitable interface inductor, DC capacitor storage series resistance and the capacitance. Here three-phase four wire DVR with modified switching band controller topology is proposed, which overcome the frequent band violation, poor controllability and heavy filter currents, and compared to three-phase four wire DVR with conventional filter topology. The compensation capability of the proposed topology is analyzed based on simulation studies and corresponding results are compared with different switching control strategies. The consequent merits and demerits switching loss in VSI, ripple in compensated load voltages and error between reference injected voltages and actual injected voltages in different switching control strategies are discussed.
Keywords: Dynamic Voltage Restorer (DVR), Neutral Clamped VSI,Switching Band Controller, Synchronous Reference Theory (SRF) and Power Quality (PQ).
Scope of the Article: Foundations Dynamics