Browse > Article
http://dx.doi.org/10.21289/KSIC.2022.25.3.433

Soft Start System of Induction Motor using Emergency Generator  

Hwangbo, Chan (Dept. of Electrical Engineering, Chonnam National University)
Ko, Jae-Ha (Dept. of Electrical Engineering, Honam University)
Lee, Jung-Hwan (Dept. of Automotive Engineering, Honam University)
Park, Seong-Mi (Dept. of Lift Engineering, Korea Lift College)
Park, Sung-Jun (Dept. of Electrical Engineering, Chonnam National University)
Publication Information
Journal of the Korean Society of Industry Convergence / v.25, no.3, 2022 , pp. 433-441 More about this Journal
Abstract
In general, in an emergency generator system for an electric facility including an induction motor load, an emergency power generation facility larger than the facility load capacity is built due to the initial starting current of the induction motor. In order to reduce this economic burden, various methods to reduce the inrush current of induction motors are applied to suppress the additional expansion of generators due to the reduction of power generation facilities and the increase in electrical facilities. Among these methods, when a system with a built-in soft start function of an induction motor using an inverter is built, it is the best way to reduce the inrush current of the induction motor to less than the rated current. However, in this case, the installation cost of the inverter to drive the induction motor increases. This paper proposes a soft start method of an induction motor by expanding the frequency and voltage control operation area of an emergency generator. In addition, proposed a speed calculation method based on power factor information, which is essential information for stable soft start of an induction motor, and a method for generating a speed command value of the governor for starting with maximum torque.
Keywords
Emergency Generator System; Induction Motor; Initial Starting Current; Soft Start Method; Inrush Current;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Jong-Gyeum Kim, Young-Kuk Kim,"A Comparison of the Operating Characteristics of the Synchronous Generator and Induction Generator Applied to the Hydropower Power Plant", KIEE, Vol. 63P, No. 2, pp. 55-60, (2014).
2 Jong-Gyeum Kim, "Characteristics Analysis for Motor or Generator Operating of Induction Machine with Deep or Double Cage Rotor", New & Renewable Energy, Vol.10, pp.3-8. (2014).   DOI
3 G. Zenginobuz, I. Cadirici, M. Ermis and C. barlak,"Soft starting of large induction motors at constantcurrent with minimized starting torque pulsations"IEEE Trans. Ind. 37(5):137-144. (2001).   DOI
4 S. A. Hamed and B. J. Chalmers, "Analysis of variable-voltage thyristor controlled inductionmotors," IEE Proceedings, vol. 137, Pt. B, no. 3, pp.184-192. (1990).
5 Paresh C. Sen, Principles of Electric Machines and Power Electronics: Second Edition, WILEY Publishing Company, Inc. pp. 337-338, (1996).
6 A. Godhwani, M. J. Basier, "A digital exitation control system for use on brushless excited synchronous generators," IEEE Trans. on Energy Converter, vol 11.No, 3., Jin Ma, "Research on pp.616-620. (1996).   DOI
7 C. J. KIM, C. Y. Choi, D. E. Lee, G. S.Choi, and S. H. Beak, "Torque characteristics ofsingle phase induction motor for phase controlmethod", in Electrical Machines and Systems,2003 ICEMS, 2003, pp. 510-513. 2003.
8 E. Muljadi, Y. Zhao, T. H. Liu, T. A. Lipo, "Adjustable ac capacitor for a single-phaseinduction motor," IEEE Trans. Ind. Appl., vol. 29,No. 3, pp. 479-485. (1993).   DOI
9 Prabha S Kundur, "Power System Stability and Control", McGraw-Hill, (1994).
10 Woon-Ki Han, Hyun-Sung Lim, "Study on Emergency Generators Operating Survey and Characteristics of Power Quality", The Korean Institute of Illuminating and electrical Installation Engineers, Vol. 28, No. 2, pp.16-23. (2014).