Title :
A new approach to enhance power quality for medium voltage AC drives
Author :
Hammond, Peter W.
Author_Institution :
Robicon Corp., Pittsburgh, PA, USA
Abstract :
A new approach to medium-voltage variable-frequency static AC motor drives offers improvements in power quality. Harmonic current injection into the power lines is below the most severe requirements of IEEE Standard 519-1992. The power factor of this new type of drive exceeds 94% at full load and is above 90% at 10% load. Motor voltage and current waveforms are improved so that torque pulsations are reduced. Peak voltage stress on motor insulation does not exceed peak input line voltage, and no zero sequence voltage is imposed. Drive efficiency exceeds 96%. This paper describes the new approach and some of the results achieved
Keywords :
AC motor drives; IEEE standards; harmonic distortion; power factor; power supply quality; power system harmonics; IEEE Standard 519-1992; MV AC motor drives; current waveforms; harmonic current injection; motor insulation; peak input line voltage; peak voltage stress; power factor; power quality enhancement; torque pulsations; voltage waveforms; Chemical industry; Costs; Manufacturing; Medium voltage; Petroleum; Power system harmonics; Power transformer insulation; Pulse width modulation; Reactive power; Torque;
Journal_Title :
Industry Applications, IEEE Transactions on
