EFFECT OF VOLTAGE SAG OF INDUCTION MOTOR

In this paper Power quality issues that affect the induction motor behaviour are voltage sag and their impact on customer loads constitute the most prevalent power quality problem in various type of industry (like spinning, rolling ,textile etc.).The impact of most severe symmetrical type voltage sag (type A) on an induction motor drive is analyzed with varying load and also duration of time varying at fixed load 75% of total load. The simulation results are provided to describe the load and time varying performances (speed and power drawn profile) of the motor under voltage sag. The results are taken with induction motor connected to three phase supply directly i.e. without any control in supply transients. Matlab based simulation model is used to implement the said control. The effect of voltage sag in the operation of mat lab based simulation model is analyzed. To enhance voltage variation capability of induction motor and the effect of voltage sag.