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Current-fed three-phase converter with optimum PWM scheme and its practical input line filter design

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2 Author(s)
Konishi, Y. ; Design Dept., Fuji Electr. Co. Ltd., Hyogo, Japan ; Nakaoka, M.

A method is described of selecting the optimum sine wave PWM patterns of a large-capacity current source-fed three-phase active PWM power converter. Its performance evaluations are also described. A practical procedure is presented of designing a low-pass filter connected to suppress higher line current harmonics flowing into the utility-grid power source. A feasibility test is performed by using a 500 kVA three-phase active current-fed PWM power converter, which has been modified. It is verified, from a practical point of view, that such conceptual considerations are more effective and acceptable in minimising higher harmonic current components flowing into the utility-grid AC power line. Furthermore, this experimental set-up provides highly efficient AC/DC PWM-PFC power converter characteristics, under the operating condition of unity power factor correction and sine wave line current shaping schemes

Published in:

Electric Power Applications, IEE Proceedings -  (Volume:145 ,  Issue: 6 )