Power quality survey and harmonic compensation in high power system

Author(s): Madhukar Wawarea*, Pramod Agarwalb
a Department of Electrical Engineering, Walchand College of Engineering, Sangli, India-416415
Department of Electrical Engineering, Indian Institute of Technology, Roorkee, India-247667
International Journal of Smart Grid and Clean Energy, vol. 3, no. 3, July 2014: pp. 291-298
ISSN: 2315-4462 (Print)
ISSN: 2373-3594 (Online)
Digital Object Identifier: 10.12720/sgce.3.3.291-298

Abstract: In this paper harmonic survey at different high power nonlinear loads is presented. An attempt is made here to record the existing level of harmonic pollution present in the Indian system for the investigation. In modern industrial sector many controlled processes are being carried out at high power and high voltage levels. A power quality survey is carried out in the industry, where high power AC drive is used. A survey at substation is also conducted to know the harmonic level present at the distribution level. Implementation of shunt active power filter (APF) in high voltage system requires high rating transformer which increases the losses and cost. But application of multilevel inverter in active filters eliminates use of bulky and high cost transformer and also improves the performance. Simulated results prove the effective elimination of harmonics with multilevel inverter in high voltage power system without use of transformer.

Keywords: Power quality, multilevel inverter, active power filters

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