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Adaptive Harmonic Elimination Technique in Single Phase PWM Inverters

Kulkarni, Abhijit and John, Vinod (2011) Adaptive Harmonic Elimination Technique in Single Phase PWM Inverters. In: National Power Electronics Conference - 2011, December 20-22, 2011, BESU, Howrah, India.

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High frequency PWM inverters produce an output voltage spectrum at the fundamental reference frequency and around the switching frequency. Thus ideally PWM inverters do not introduce any significant lower order harmonics. However, in real systems, due to dead-time effect, device drops and other non-idealities lower order harmonics are present. In order to attenuate these lower order harmonics and hence to improve the quality of output current, this paper presents an \emph{adaptive harmonic elimination technique}. This technique uses an adaptive filter to estimate a particular harmonic that is to be attenuated and generates a voltage reference which will be added to the voltage reference produced by the current control loop of the inverter. This would have an effect of cancelling the voltage that was producing the particular harmonic. The effectiveness and the limitations of the technique are verified experimentally in a single phase PWM inverter in stand-alone as well as g rid interactive modes of operation.

Item Type: Conference Paper
Department/Centre: Division of Electrical Sciences > Electrical Engineering
Date Deposited: 13 Apr 2012 09:39
Last Modified: 13 Apr 2012 09:40
URI: http://eprints.iisc.ac.in/id/eprint/43123

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