Analysis of Power Factor Correction Schemes in Rectifier Circuits

Liam Mannion, Prof. W. G. Hurley

This project describes novel analytical methods of approaching and implementing power factor correction in modern power electronic circuits. Both active and passive power factor correction schemes are discussed and compared. The specific case of a fullwave rectifier circuit is analysed in some detail; the emphasis being on reducing the harmonic content of the source current by choosing an appropriate range of source impedance. This method is then further improved by considering how judicious placement of the circuit impedance can improve power factor still further. Mathematical descriptions, based on simplifying assumptions, of how impedance effects power factor are presented and verified. The effect of phase control on rectifier circuit behaviour is also discussed and quantified. Overall, the thesis seeks to provide convenient and reliable descriptions of power factor correction schemes commonly in use today.

Start date: 1st of October 1993. This project has been completed.

Project Publications 

Conference
L. Mannion, W. G. Hurley, "Rectifier Circuit Analysis with Power Factor Correction", 30th Universities Power Engineering Conference, UPEC'95, University of Greenwich, London, vol. 2, pp. 753-756, September 1995.
L. Mannion, W. G. Hurley, "Effect of Source Impedance on Input Current Harmonics in Rectifier Circuits", 29th Universities Power Engineering Conference, UPEC'94, University College Galway, vol. 2, pp. 963-966, September 1994.

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