Application of Induction Motor Simulation Models to Power Station Auxiliary Pump Drives

Transient operation, such as that caused by faults or switching, often results in auxiliary drive motors departing significantly from their normal operating speed. Under these conditions it is necessary to take account of parameter changes caused by saturation and eddy current effects. The paper presents a mathematical model which utilises a modal technique to represent eddy currents and includes saturation effects. The model also included a representation of the mechanical system. A number of important operating conditions are simulated and comparisons of test and computed results are presented for a test machine.