Two-channel control of three-phase inverters for distortion reduction

Lakshmanan, Padmavathi and Janakiraman, Panapakkam Arumugam 2013. Two-channel control of three-phase inverters for distortion reduction. Iet Power Electronics 6 (1) , pp. 192-201. 10.1049/iet-pel.2012.0270

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Abstract

A new two-phase, independent control strategy for three-phase three-wire static inverters to reduce unbalance in output voltage is proposed. The three-phase voltage and current signals are processed by the ideal Clarke transform block to yield two single-phase signals, which contain information regarding unbalance and harmonics which may be present in the three-phase signals. If the two single-phase voltage signals could be controlled so that they become equal in magnitude with a phase shift of 90° (ideal alpha beta signals), then the corresponding terminal three-phase voltage signals would become balanced. Singlephase observers are employed to control the fundamental components in the two identical d-q frames created. Simultaneously, when the harmonics are eliminated in the two single-phase channels, the corresponding three-phase voltage signals would become distortion free. Feed-forward compensation can be carried out using the equivalent series-impedance parameters, estimated on-line using a simple identification algorithm. This procedure is not sensitive to frequency and can take care of the voltage drop in the distribution transformer. The simulation and experimental results for a field programmable gate array (FPGA) controlled 60 V table top inverter fabricated in the laboratory are provided

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering
Uncontrolled Keywords:	Observers ; Power system control ; Feedforward ; Field programmable gate arrays ; PWM invertors
Publisher:	Institution of Engineering and Technology
ISSN:	1755-4535
Last Modified:	21 Oct 2016 03:48
URI:	https://orca.cardiff.ac.uk/id/eprint/52264

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