Time Domain Analysis of a Synchronous Generator in Distorted Power Systems

Abstract

Calculating the synchronous generator steady state operating conditions and load angle is essential for power system studies. Time and space harmonics can cause variations on power system operation. This paper investigates the impact of time and space harmonics on the synchronous generator inductances, rotor currents, produced stator fluxes and voltages, electromagnetic torque, and the steady state rotor angle. Harmonic domain and abc-frame of reference is used for non-linear modelling of synchronous generators. The instantaneous electromagnetic torque is calculated using rotational voltage component. Simulation results show that the presence of harmonics can affect the synchronous generator steady state operation and damper windings have considerable impact on the produces stator fluxes and voltages in the presence of harmonics. MATLAB/Simulink software and Simpower system toolbox are used for the simulation in time domain.

Key Words:

• Synchronous generator
• non-linear model
• harmonic domain
• time domain
• distorted systems

Additional information

Notes on contributors

M. Ladjavardi

Marjan Ladjavardi received her BS and MS degrees in electrical engineering from the Iran University of Science and Technology, Tehran, Iran, in 1999 and 2001, respectively. She is currently pursuing her PhD degree in electrical and computer engineering at the Curtin University of Technology, Perth, Australia.

M.A.S. Masoum

Mohammad A. S. Masoum received his BS, MS and PhD degrees in electrical and computer engineering from the University of Colorado, Boulder, in 1983, 1985 and 1991, respectively. His research interests include optimisation, power quality and stability of power systems/electric machines, and distributed generation. Currently, he is an Associate Professor in the Electrical and Computer Engineering Department, Curtin University of Technology, Perth, Australia.

S.M. Islam

Syed M. Islam is the Professor of Electrical Power Engineering and Head of the Department of Electrical & Computer Engineering at Curtin University of Technology, Perth, Australia. He was the recipient of the Dean’s Medallion for Research in 1999 and the IEEE T Burke Haye’s Faculty Recognition award in 2000. His research interests are in power systems, grid connection of renewable energy systems, and power quality. He is Fellow of Engineers Australia, a Fellow of the IEE and a Senior Member of the IEEE.