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Modeling and Estimating Current Harmonics of Variable Electronic Loads

Author(s)
Wichakool, Warit; Avestruz, Al-Thaddeus; Cox, Robert W.; Leeb, Steven B.
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Abstract
This paper develops a model for relating input current harmonic content to real power consumption for variable electronic loads, specifically for loads' actively controlled inverters energized by an uncontrolled rectification of the utility. This model serves as the basis for a method for estimating and disaggregating the power consumption of variable speed drives (VSDs) and rectifier loads from other constant power loads. This method can be used for nonintrusive power monitoring. The approach described in this paper uses the approximate switching function of the rectifier to derive the best estimating function for the fundamental current harmonic from a finite set of current harmonics uniquely associated with the operation of the drive. Experimental results show that the proposed VSD power and harmonic estimator can track VSD power consumption for monitoring given knowledge or an estimate of the input current harmonic content.
Date issued
2009-08
URI
http://hdl.handle.net/1721.1/71879
Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science; Massachusetts Institute of Technology. Laboratory for Electromagnetic and Electronic Systems
Journal
IEEE Transactions on Power Electronics
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Citation
Wichakool, W. et al. “Modeling and Estimating Current Harmonics of Variable Electronic Loads.” IEEE Transactions on Power Electronics 24.12 (2009): 2803–2811. © Copyright 2012 IEEE
Version: Final published version
ISSN
0885-8993
1941-0107

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