Protection of medium voltage SCR driven soft-starter from high frequency switching transients

摘要

Starting of an induction motor is a process that creates many challenging problems for the motor, and operations of the power system. The induction motor can be damaged, characteristics can be changed, and performances of the motor can be worsened. Having a significantly higher starting current than the rated current can produce mechanical and thermal stress on the motor and the loads. High voltage fluctuations, dips and sags, can occur in electrical power system associated with the motor. Many different methods have been developed to address particular induction motor starting problems associated with motor size and the stability of the connected network.