Statistical and economic analysis of power quality impact on thermal behaviour and life expectancy of three-phase induction motors

This paper deals with thermal behavior and life expectancy analysis of three-phase induction motors under non-sinusoidal supply, emphasizing the random nature voltage variations due the dynamic of electrical power systems. The necessity to realize the statistical/probabilistic procedure to analyze power quality problems and their impact on the electrical equipment is due mainly to its variable nature over time the supply busbar. This strategy better represent the randomness of such phenomena. Computational studies are then performed to evaluate motor temperature rise and life reduction under non ideal conditions. Additionally studies on the economic impacts from the operation under the same conditions will be realized.