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DC Voltage Controller for Asymmetric-Twin-Converter-Topology-Based High-Power STATCOM

DSpace at IIT Bombay

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Title DC Voltage Controller for Asymmetric-Twin-Converter-Topology-Based High-Power STATCOM
 
Creator ANAND, S
FERNANDES, BG
CHATTERJEE, K
 
Subject DC voltage regulation
harmonic suppression
multilevel operation
pulsewidth modulation (PWM)
static compensator (STATCOM)
CASCADED MULTILEVEL CONVERTERS
INDUSTRIAL APPLICATIONS
INVERTERS
MODULATION
REQUIREMENTS
STRATEGY
 
Description A four-level static compensator integrating two 2-level converters, supplying/absorbing reactive power to/from the grid, is reported in our earlier paper. Reduced component count, simpler layout for switches, and smaller dc-link capacitor values are the attractive features of the proposed topology over the diode clamped and cascaded multilevel converters. This paper suggests further improvements in this topology. Suitable selection of the dc-link voltage values reduces distortion in the current fed to the grid. In addition, circuit topology is modified to avoid the split-capacitor dc links. This reduces the number of independent dc capacitor voltages to be controlled and eliminates the flow of third-harmonic current through the transformer. In order to improve the performance, a phase-shifted carrier-based pulsewidth modulation technique is used. A mathematical model of the system is derived, based on which a controller for the scheme is designed. The effectiveness of the scheme is verified through detailed simulation study. To confirm the viability of the scheme, experimental studies are carried out on a scaled-down laboratory prototype developed for the purpose.
 
Publisher IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
 
Date 2014-10-17T05:41:28Z
2014-10-17T05:41:28Z
2013
 
Type Article
 
Identifier IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, 60(1)11-19
http://dx.doi.org/10.1109/TIE.2012.2185023
http://dspace.library.iitb.ac.in/jspui/handle/100/16093
 
Language en