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Harmonics Generation by Low Capacity VFD (Variable Frequency Drive), When Used in Energy Saving

Author(s):

Patel Pratik B. , GEC,Bhuj; Prof. R. R. Kapadia, GEC,Bhuj; Prof. K. A. Sonagra, GEC,Bhuj

Keywords:

variable Frequency Drive (VFD), Induction Motor (IM).

Abstract

Seventy Percentages (70%) of electrical energy generated is consumed by three phase induction motors (3Ñ„ IM) all over the world and the demand is increasing day by day because of industrial growth. This means that if we save electrical energy consumed by 3Ñ„ IM, it can be a huge saving of energy as well as natural resources. To save energy consumed by 3Ñ„IM a Variable Frequency Driver (VFD) is the best solution when used in a variable speed application. With the use of VFD, 3Ñ„IM drive takes exactly the desired amount of power from the supply line. It means that power will not be lost in mechanical components. This is direct saving of electrical energy. In this paper, it is a humble effort to evaluate the harmonics generated by the VFD when used in energy conservation application. In this paper we will also give a kind of power line filters are necessary for the electronics components mounted on the same supply line. An energy conservation test setup will be made for variable flow application. The pump motor is given supply from both the VFD and direct contactor one by one. The consumed energy and harmonics generated along with Total Harmonics Distortion (THD) is measured with the help of three phase power analyzer and the results are compared internally as well as with simulation results.

Other Details

Paper ID: IJSRDV2I3005
Published in: Volume : 2, Issue : 3
Publication Date: 01/06/2014
Page(s): 1659-1661

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