Table of Contents
Advances in Electrical Engineering
Volume 2014, Article ID 727295, 9 pages
http://dx.doi.org/10.1155/2014/727295
Research Article

Modelling and Simulation of Static Excitation System in Synchronous Machine Operation and Investigation of Shaft Voltage

1Central Power Research Institute, Bhopal 462023, India
2Maulana Azad National Intitute of Technology, Bhopal 462051, India

Received 3 April 2014; Accepted 9 June 2014; Published 3 July 2014

Academic Editor: Ergina Kavallieratou

Copyright © 2014 Arun Kumar Datta et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Static excitation system (SES) has been implemented in a specially designed synchronous machine installed in a testing laboratory. This is a large capacity single machine operated in dual mode (i.e., motor or generator) with the help of static sources. It is well known that bearings of the rotating machines are vulnerable to the effects of the shaft voltages caused by the static sources. Shaft voltage is the prime concern for this special machine too due to SES. To find out the exact cause of the shaft voltage, SES of this machine has been modelled with Power Systems software. Various waveforms drawn from the model are validated through computer simulations and actual laboratory tests. Sources of shaft voltages are also analysed thereafter with the FFT analysis of the rotor voltage and current waveforms.