Analysis the Effect of Using Synchronous Motor as a Synchronous Condenser for Power Factor Improvement of 3-Phase Cage Rotor Induction Motor

Mutiar (Department of Electrical Engineering, Sriwijaya State Polytechnic Palembang)
Subianto (Department of Electrical Engineering, University of Palembang)
Daeny Septi Yansuri (Department of Electrical Engineering, University of Palembang)
Marliyus Sunarhati (Department of Electrical Engineering, University of Palembang)
Surya Dharma (Department of Electrical Engineering, University of Palembang)
Sutan Marsus (Department of Electrical Engineering, Sriwijaya State Polytechnic Palembang)

Jurnal Multidisiplin Madani (MUDIMA)
Vol. 2 No. 12 (2022): December 2022

Synchronous motors working at a capacitive power factor of 0.8 are obtained by providing a 0ver excitation, meaning operation at a capacitive power factor to improve the power factor of the system when connected to an inductive load, as is the case with an induction motor. A synchronous motor that is over-excitation will act like a capacitor and suck up the current that lead the voltage. A synchronous motor that works without a load that is given over excitation will function as a synchronous compensator whose capacitive value can be adjusted. The condition of this synchronous compensator is installed on a cage rotor induction motor as a power factor improvement. The results of this study showed that the power factor value of the induction motor before installing the synchronous compensator was cos φ = 0.88 and the reactive power was 132,84 VAR, after installing the synchronous compen sator, cos φ = 0.91 to 0.99 and the reactive power was 68 VAR to 28,2 VARs