Real And Reactive Power Saving In Three Phase Induction Machine Using Star-Delta Switching Schemes
Journal: International Journal of Scientific & Technology Research (Vol.6, No. 4)Publication Date: 2017-04-15
Authors : Ramesh Daravath; Lakshmaiah Katha; Ch. Manoj Kumar; AVS Aditya;
Page : 28-32
Keywords : Real and Reactive power saving; light loading; case study of induction machine; phase controlled anti parallel thyristor bank; star-delta switching; harmonics; predetermined values;
Abstract
Induction machines are the most commonly used industrial drives for variety of applications. It has been estimated that induction motors consumes approximately 50 of all the electric energy generated. Further in the area of renewable energy sources such as wind or bio-mass energy induction machines have been found suitable for functioning as generators. In this context it may be mentioned that a star-delta switching is common for the starting of three-phase induction motor. Now it is proposed to use this star-delta switching for energy conservation of induction machines i.e. at times of reduced loads the machine switched back to star connection. Using a three-phase 400 V 50 Hz 4-pole induction machine it has been demonstrated that the star-delta switching of stator winding of three-phase induction machine motor generator operations reconnected in star at suitable reduced loads with a switching arrangement can result in improved efficiency and power factor as compared to a fixed delta or star connection. The predetermined values along with the experimental results have also been presented in this report. A simulation program has been developed for the predetermination of performance of the three-phase induction machine using exact equivalent circuit. A case study on a 250 kW 400 V 4-pole three-phase induction machine operated with different load cycles reveals the significant real and reactive power savings that could be obtained in the present proposal.
Other Latest Articles
- Increasing Public Expenditure
- Impact Of Customer Awareness Competition And Interest Rate On Growth Of Islamic Banking In Pakistan
- Stress Relaxation Of Superelastic Shape Memory Alloy Under Bending And Torsional Load
- The Thinking Of Muhammad Ibn Muhammad Ibn Al-Hasan Al-Tusi In Trigonometri
- The Development Of Windows Service Based Data Log System Using Light Dependent Resistor And Thingspeak IOT Cloud Platform
Last modified: 2017-06-11 23:00:38