REACTIVE POWER COMPENSATION IN SQUIRREL CAGE ROTOR TYPE OF THREE PHASE INDUCTION MOTORS
G Tjahjono, F G. Ray, I Fahmi, C P Tamal, R H Modok, T Setiawaty
Department of Electrical Engineering Education:
University of Nusa Cendana Kupang, Indonesia
Abstract
The purpose of this study is to produce: (1) The average voltage in squirrel-cage rotor type of three-phase induction motor load. (2) The average current in squirrel-cage rotor type of three-phase induction motor load. (3) The average apparent power in squirrel-cage rotor type of three-phase induction motor load. (4) The average reactive power in squirrel-cage rotor type of three-phase induction motor load. (5) The best capacitor value for saving reactive power in squirrel-cage rotor type of three-phase induction motor load. The research method used is a quantitative description approach by applying measurement methods the Laboratory of Department of Electrical Engineering Education, Nusa Cendana University, Kupang. The study population was the entire squirrel-cage rotor type of three-phase induction motor controller using the star to delta method. The sample is a number of measurements of voltage, current, and power on a three-phase induction motor using the star to delta method.. The conclusions of the research are: (1) The average phase voltage to neutral, to run a squirrel-cage rotor type of three-phase induction motor obtained a value of 244.5 [V]. (2) The average IR current for star-connection load without capacitor obtained a value of 0.1667 [A]. The average IS current for star-connection load without capacitor obtained a value of 0.1575 [A]. The average IT current for star-connection load without capacitor obtained a value of 0.147 [A]. (3) The average IR current for delta-connection load without capacitor obtained a value of 0.58 [A]. The average IS current for delta-connection load without capacitor obtained a value of 0.518 [A]. The average IT current for delta-connection load without capacitor obtained a value of 0.466 [A]. (4) The average IR current for delta-connection load with the capacitor of 11.57 [µF] obtained a value of 0.0845 [A]. The average IS current for delta-connection load with the capacitor of 11.57 µF obtained a value of 0.1577 [A]. The average IT current for delta-connection load with the capacitor of 11.57[µF] obtained a value of 0.0763 [A]. (5) The average apparent power for star-connection load without capacitor obtained a value of 10.3 [Watt]. The average reactive power for star-connection load without capacitor obtained a value of 58 [VAR]. (6) The average apparent power for delta-connection load without capacitor obtained a value of 24.4 [Watt]. The average reactive power for delta-connection load without capacitor obtained a value of 205 [VAR]. (7) The average apparent power for delta-connection load with the capacitor of 11.57 [µF] obtained a value of 9,9 [Watt]. The average reactive power for delta-connection load with the capacitor of 11.57 [µF] obtained a value of 9,4 [VAR]. (8) Capacitor value 11.57 [µF] is the best value for reactive power savings in squirrel-cage rotor type of three-phase induction motor.
Keywords: Compensation, reactive power, induction motor, squirrel-cage rotor
Topic: Electrical Engineering