Modeling and Analysis of User-Defined-Constant-Switching Frequency DSTATCOM for Three Phase Four Wire Distribution System

  ijett-book-cover  International Journal of Engineering Trends and Technology (IJETT)          
  
© 2012 by IJETT Journal
Volume-3 Issue-2                          
Year of Publication : 2012
Authors :  S. Suresh, Dr. Devarajan,N.Vidhya,V. Rajasekaran

MLA 

S. Suresh, Dr. Devarajan,N.Vidhya,V. Rajasekaran. " Modeling and Analysis of User-Defined-Constant-Switching Frequency DSTATCOM for Three Phase Four Wire Distribution System". International Journal of Engineering Trends and Technology (IJETT). V3(2):213-220 Mar-Apr 2012. ISSN:2231-5381. www.ijettjournal.org. published by seventh sense research group

Abstract

This paper deals with modeling and analysis of User Defined Constant Switching (UDCS) frequency current - controlled based four - leg DSTATCOM . The first three - phase legs are operated in hysteresis current tracking mode, and the neutral is operated by fixed switching square pulses of desired frequency. Consequently, the first three legs get tuned to the fourth leg’s user defined frequency. Analytical expression s are derived to specify the range of frequency at which the scheme functions effectively. Design procedure for selection parameter of the four leg inverter such as hysteresis band, DC link voltage, DC link capacitor and inductor are suggested, and simulations are done to value the design procedure for a UDCS - controller based DSTATCOM. Comparison is made between the performance of the UDCS controlled DSTATCOM and conventional hysteresis - controlled DST ATCOM and presented

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Keywords
Active power filter, constant switching frequency, current control, design, voltage source inverter (VSI)