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http://dx.doi.org/10.5207/JIEIE.2013.27.1.076

A Study on the Estimation of the Resonance Frequency for an Active Damping Technique of Grid Connected Converters  

Park, Il-Woo (Samsung Heavy Industries)
Lee, Woo-Cheol (Hankyong National University Dept. of Electrical Electronic & Control Engineering, Institute for information technology convergence)
Publication Information
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers / v.27, no.1, 2013 , pp. 76-84 More about this Journal
Abstract
The renewable energy sources is raising for use of grid connected systems, for which higher power quality requirements are being issued. A grid connected converter requires a LC-filter stage, this one is lightly damped for efficiency constraints. Hence, it is subject to resonance if excited by the converter current harmonics or pre-exciting grid voltage harmonics. In this paper, an active damping technique employing notch filter for damping of the resonance frequency is introduced. This technique doesn't need to additional sensors. In addition, it is simple to apply for various systems. Monitoring of the resonance frequency ensures the stable operation of the proper connection and disconnection of the grid. This paper proposes the estimating method of a resonant frequency to determine the cut-off frequency of the notch filter. This method is validated by both simulation and experimental results.
Keywords
Grid Connected; Active Damping; Resonance Frequency;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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