Enhancement of Stability and Power Quality in Salient-Pole Synchronous Generators via Rotor Flux Barriers for Quadrature-Axis Reactance Control
Article Sidebar
Main Article Content
Abstract
Building upon our previous research (Kim et al. 2023), which conclusively established the rotor flux barrier as an effective method for selectively reducing quadrature-axis synchronous reactance (Xq), this study addresses a crucial question that arose from those findings. While Kim et al. (2023) successfully demonstrated the feasibility of reducing, it left a significant research gap: the systematic cause-and-effect relationship between this change and the resulting improvements in overall performance. This paper moves beyond merely modifying parameters to explore the cascading effects of reduction on the core operational characteristics of the generator. Our primary objective is to quantitatively trace the pathway from the implementation of the flux barrier to simultaneous enhancements in three interconnected performance metrics: steady-state stability (through load angle reduction), power quality (via improved voltage regulation), and operational efficiency (through reduced braking torque). To accomplish this, we employ a combined approach of theoretical analysis and experimental validation. Through rigorous finite-element analysis and testing on a 50 kVA prototype, we provide definitive evidence of the system-level benefits associated with controlled reduction. This work confirms that flux barriers serve not just as a technique for reactance suppression, but as a comprehensive structural enhancement strategy that addresses multiple performance objectives in a unified manner, particularly for salient-pole synchronous generators operating without damper windings.
Article Details
Section
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
-
Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
-
ShareAlike — If you remix, transform, or build upon the material, you must distribute your contributions under the same license as the original.
- No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.
How to Cite
References
Boldea, I. (2015a). Synchronous Generators (2nd ed.). CRC Press. DOI: 10.1201/b19310.
Boldea, I. (2015b). Variable Speed Generators (2nd ed.). CRC Press, Boca Raton. DOI: 10.1201/b19293.
Chan, T.F., Lai, L.L. and Xie, S. (2009). Field computation for an axial flux permanent-magnet synchronous generator. IEEE Transactions on Energy Conversion, 24(1), 1–11. DOI: 10.1109/TEC.2008.2011830.
Chau, K.T. (2015). Electric Vehicle Machines and Drives: Design, Analysis and Application. Wiley-IEEE Press, Singapore. DOI:10.1002/9781118752555.
Despalatovic, M., Jadric, M. and Terzic, B. (2008). Real-time power angle determination of salient-pole synchronous machine based on air gap measurements. Electric Power Systems Research, 78(10), 1803–1809. DOI: 10.1016/j.epsr.2008.03.013.
Dziechciarz, A. and Martis, C. (2017). Simplified model of synchronous reluctance machine with optimized flux barriers. Electrical Engineering, 99, 1207–1216. DOI: 10.1007/s00202-017-0616-1.
Kim, J.H., O, T.S., Ri, Y.S. et al. (2023). Reduction of quadrature armature reaction in salient-pole synchronous generator by rotor flux barrier. Electr Eng, 105, 4387-4398. DOI: 10.1007/s00202-023-01955-8.
Liang, P., Pei, Y., Chai, F., Bi, Y. and Cheng, S. (2016). An improved method for armature-reaction magnetic field calculation of interior permanent magnet motors. IEEE Transactions on Magnetics, 52(7), 8204604. DOI: 10.1109/TMAG.2016.2521873.
Pyrhönen, J., Jokinen, T. and Hrabovcová, V. (2008). Design of Rotating Electrical Machines. John Wiley & Sons, Chichester.
Salminen, P., Niemelä, M. and Pyrhönen, J. (2006). Permanent magnet motor with embedded magnets and flux barriers. in Krawczyk, A. and Wiak, S. (Eds.), Electromagnetic Fields in Mechatronics, Electrical and Electronic Engineering. IOS Press, 461–466.
Sumina, D., Sala, A. and Malaric, R. (2010) Determination of load angle for salient-pole synchronous machine. Measurement Science Review, 10(3), 89–96. DOI: 10.2478/v10048-010-0018-2.
Yamazaki, K., Kato, Y., Ikemi, T. and Ohki, S. (2013) Reduction of rotor losses in multilayer interior permanent-magnet synchronous motors by introducing novel topology of rotor flux barriers. 2013 IEEE Energy Conversion Congress and Exposition, Denver, CO, USA, 2013, 1220-1226, DOI: 10.1109/ECCE.2013.6646844.
Yamazaki, K., Suzuki, R., Nuka, M. and Masegi, M. (2017). Characteristics analysis of claw-pole alternator for automobiles by nonlinear magnetic field decomposition for armature reaction. IEEJ Journal of Industry Applications, 6(6), 362–369. DOI: 10.1541/ieejjia.6.362.