Mhj. Bollen et Pme. Dirix, SIMPLE-MODEL FOR POST-FAULT MOTOR BEHAVIOR FOR RELIABILITY POWER QUALITY ASSESSMENT OF INDUSTRIAL-POWER SYSTEMS, IEE proceedings. Generation, transmission and distribution, 143(1), 1996, pp. 56-60
Voltage sags are more and more being considered as a severe power qual
ity problem. However, stochastic prediction tools for voltage sags are
rare. The few methods that have been proposed assume a rectangular vo
ltage sag. This assumption is no longer true in many industrial power
systems with large induction motor loads. A simple induction motor mod
el has been developed to describe the extra current taken by the motor
during the re-acceleration after a short circuit. This model has been
incorporated in the method for reliability/power quality analysis of
power systems, as described in a paper. Simulations are presented to s
how the influence of the post-fault voltage sag due to motor re-accele
ration on the reliability/power quality of the supply. The simulations
result in a table with the expected number of interruptions of plant
operation for different load sensitivities.