Analysis of current distortion of the unsteady non-linear loads

• Published in: 2008 13th International Conference on Harmonics and Quality of Power pp. 1 - 6
• Main Authors: Pawelek, R., Gburczyk, P., Wasiak, I.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01-09-2008
• Subjects: Active filters; Active power filters; Bridge circuits; Fluctuations; Frequency; Harmonics and interharmonics; Hysteresis; Nonlinear distortion; Power harmonic filters; Power quality; Power system harmonics; Simulation; Thyristors; Total harmonic distortion
• ISBN: 9781424417711; 1424417716
• ISSN: 1540-6008; 2164-0610
• DOI: 10.1109/ICHQP.2008.4668794

In the paper there has been performed an assessment of the distortion of current drawn by the unsteady non-linear load, with special reference to interharmonic components. There has been studied the capability to restrain the interharmonics by means of the shunt active power filter with hysteresis control utilizing typical control algorithm based on the instantaneous power theory. As a disturbing load the 6T type thyristor bridge with RL elements of varying values in the DC circuit has been used. Studies have been performed by means of the simulation method using the network model built in the PSCAD reg /EMTDCtrade program. The assessment of the current distortion has been performed according to the procedures defined in the EN 61000-4-7 standard.