NDLI: DC- Capacitance Estimation of DC-Link Capacitors using AC Voltage Injection in AC/DC/AC PWM Converters

Content Provider	IEEE Xplore Digital Library
Author	Abo-Khalil, A.G. Dong-Choon Lee
Copyright Year	2006
Description	Author affiliation: Dept. of Electr. Eng., Yeungnam Univ., Gyeongbuk (Abo-Khalil, A.G.; Dong-Choon Lee)
Abstract	In this paper, a novel online capacitance estimation method for a DC-link capacitor in a three-phase AC/DC/AC PWM converter is proposed. A controlled AC voltage with a lower frequency than the line frequency is injected into the DC-link voltage, which then causes AC power ripples at the DC output side. By extracting the AC voltage and power components on the DC output side using digital filters, the capacitance can then be calculated using the support vector regression (SVR) method. A continuous-valued function that plots the fundamental interrelation between a given input (capacitance power) and its corresponding output (capacitance value) can be estimated using SVR and based on the training data. This function then can be used to predict outputs for given inputs that are not included in the training set. The proposed method can be simply implemented with only software and no additional hardware. Experimental results confirm that the estimation error is less than 0.15%
Sponsorship	IEEE Ind. Appl. Soc. IEEE Florida West Coast Sect
Starting Page	2095
Ending Page	2100
File Size	5839871
Page Count	6
File Format	PDF
ISBN	1424403642
ISSN	01972618
DOI	10.1109/IAS.2006.256824
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-10-08
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Estimation error Temperature Capacitors Estimation Pulse width modulation PWM converters Capacitance measurement Electrolytic capacitor Voltage control SVR Electrodes Pulse width modulation converters Frequency Cathodes
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering

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