Comparative analysis of total harmonic distortion on the current waveform by PWM fed and Vector Controlled Permanent magnet synchronous motors
Abstract
This paper involves analysis, control and modeling of PMSM and It involves the use of Permanent magnet synchronous motors. It also observes its effects on Total current harmonic distortion by making use of PWM generator and Vector control method . By making use of Park’s transformation ,one can convert three phase system to two phase and then convert it to stationery two axes system (d, q) and finally to synchronously rotating reference frame system By varying both the vectors of flux and torque,(one on quadrature and other on direct axis) one can control the rotor current and therefore, speed of the motor and then THD for current and voltage can be calculated. Adjustable speed drive are becoming a important load component for power distribution Harmonics are lesser in amplitude and more in frequency as compared to the fundamental. Vector control and direct torque control are employed in variable-speed ac drive systems, particularly for induction machine drives. In order to generate PWM signals, an error value is calculated by comparing the current reference and actual current, and it is used as an input for hysteresis control. Then, the voltage vector is obtained, and the motor is driven by using the inverter to follow current reference values.
References
[5] G Ramtharan, J. B. Ekanayake, and N. Jenkins, “Frequency support from doubly fed induction generator wind turbines,” IET Renewable Power Generation, vol. 1, no. 1, pp. 3–9, 2007. [6] A. Tapia, G. Tapia, J. X. Ostolaza and J. R. Saenz, “Modeling and Control of a Wind Turbine Driven Doubly Fed Induction Generator,”IEEE Trans. on Energy Conversion, vol. 18, no. 2, pp. 194-204, June 2003. [7] L. Xu and Y. Wang, “Dynamic Modeling and Control of DFIG-Based Wind Turbines Under unbalanced Network Conditions,” IEEE Trans. On Power Systems, vol. 22, no.1, pp. 314-323, Feb. 2007. [8] I. Cadirci and M. Ermis, “Double-output induction generator operating at sub-synchronous and supersynchronous speeds: steady-state performance optimization and wind-energy recovery,”IEEE Proceedings-B, vol. 139, no. 5, pp. 429-442, Sept. 1992. [9] R. Peña, J. C. Clare, and G. M. Asher, “Doubly Fed Induction Generator using back-to-back PWM converters and its application to variable speed wind-energy generation,” Proc. Inst. Elect. Eng., Elect. Power Appl., vol.143, no. 3, pp. 231–241, May 1996. [10] L. Xu and W.Cheng, “Torque and Reactive Power Control of a Doubly Fed Induction Machine by Position Sensorless Scheme,” IEEE Trans on Industry Applications, vol. 31, no.3, pp.636-642, May/June 1995. [11] A. Petersson, L.Harnefors, and T. Thiringer, “Evaluation of current control methods for wind turbines using doubly-fed induction machines,” IEEE Trans. Power Electron., vol. 20, no. 1, pp. 227–235, Jan. 2005. [12] Yifan Tang and Longya Xu, “A flexible active and reactive power control strategy for a variable speed constant frequency generating system,” IEEE Trans. on Power Electronics, vol. 10, no. 4, pp. 472-478, July 1995. [13] A. Ostadi, A. Yazdani, and R. K. Varma, “Modeling and Stability Analysis of a DFIG-Based Wind-Power Generator Interfaced With a Series-Compensated Line,” IEEE Trans. on Power Delivery, vol. 24, no.3, pp. 1504-1514, July 2009.
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