A Modified Current Controller for H-Bridge Active Filter to Reduce Harmonics in Single Phase System

A. Naraina; S.N. Deepa

doi:10.4028/www.scientific.net/AMM.573.122

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 573A Modified Current Controller for H-Bridge Active...

A Modified Current Controller for H-Bridge Active Filter to Reduce Harmonics in Single Phase System

Abstract:

— this paper presents a digital current controller for H-bridge pulse width modulation (PWM) converters, whose sampling frequency equals quadruple of the switching frequency,. This current regulator detects the ac current and manipulates the voltage reference not only at the upper and lower peaks of the PWM triangle carrier but also at its zero crossings. A modified deadbeat current regulator is proposed to suppress the current oscillation induced by the voltage error, based on the theoretical analysis. Experimental results are shown to verify the control performance of the proposed current regulator. Moreover, a proposed current regulator is applied to a single-phase active power filter to demonstrate the effectiveness in harmonic compensation. Index Terms—Current regulators, digital control, DSPs, pulsewidth modulation (PWM), shunt active filters.

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Periodical:

Applied Mechanics and Materials (Volume 573)

Pages:

122-129

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.573.122

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Online since:

June 2014

Authors:

A. Naraina*, S.N. Deepa

Keywords:

Current Regulators, Digital Control, DSP, Pulsewidth Modulation (PWM), Shunt Active Filter

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References

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