NDLI: Analysis of a controllable LC-filter for compensation of specific harmonics

Content Provider	IEEE Xplore Digital Library
Author	Klesser, H.W. de Haan, S.W.H. Woudstra, J.B.
Copyright Year	1998
Description	Author affiliation: Power Electron. & Electr. Machines, Delft Univ. of Technol., Netherlands (Klesser, H.W.; de Haan, S.W.H.; Woudstra, J.B.)
Abstract	In this paper a recently proposed circuit to compensate harmonics is analysed. The circuit consists of an LC-filter which is connected in series with an electronic switch, which enables control of the system. The compensator is intended to be connected in parallel to a harmonic-generating appliance, such as line commutated converters. The system is analysed for the third harmonic by applying the principle of superposition. The circuit is considered to be excited by the undistorted grid voltage with the so called switch voltage superimposed on it. After fourier-series expansion of the switch voltage, linear circuit theory is applied. Based on the analysis, a mathematical relation between the harmonic and major control and circuit parameters is derived. The obtained formula's can be used for purpose of control and design for a system with one zero current interval. The model has been verified by comparison with experimentally obtained results. The analysis led to following conclusions: 1) for control with a single dead time, the current amplitude is roughly proportional to cos (/spl omega/t/sub 1/), where t/sub 1/ is the firing instant with respect to the -/+ zero crossing of the phase voltage. 2) phase and amplitude cannot be controlled independently if one zero current interval is applied 3) for a phase angle of 90/spl deg/ the amplitude has a maximum, which is for many applications an acceptable combination.
Starting Page	588
Ending Page	591
File Size	205485
Page Count	4
File Format	PDF
ISBN	0780348796
DOI	10.1109/PEDES.1998.1330667
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1998-12-01
Publisher Place	Australia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Power harmonic filters Switches Active filters Voltage Thyristors Power system harmonics Harmonic analysis Switching circuits Home appliances Frequency
Content Type	Text
Resource Type	Article

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