Abstract
The large number of harmonics in permanent magnet synchronous generator (PMSG) stator current is harmful to wind turbine generators (WTGs), which will greatly increase current ripple and torque pulsation, and finally reduce the generator efficiency, especially in modern high power wind generation occasion, representing challenges. In this chapter, the low harmonic multi-pulse rectifiers with current injection at DC side are presented, in order to improve the low power factor (PF) of uncontrollable rectifier and overcome the high failure ratio of pulse width modulation (PWM) rectifier. The proposed strategy is to use the direct current injection at DC side in PMSG to compensate the current harmonic, which brings about less harmonic of generator stator current. Simulation results show the correctness of the theoretical analysis and feasibility of the proposed power converter and compensation strategy.
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Acknowledgements
The authors wish to thank the project supported by the Natural Science Foundation of Gansu Province Education Department (2017A-020), the National Natural Science Foundation of China (51767013), the Science and Technology Research and Development Plan of China Railway Corporation (2017J012-A).
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Chen, Xq., Zhao, Sw., Wang, Y., Li, M. (2018). Harmonics Elimination in Permanent Magnet Synchronous Generator with Current Injection at DC Side. In: Zhu, Q., Na, J., Wu, X. (eds) Innovative Techniques and Applications of Modelling, Identification and Control. Lecture Notes in Electrical Engineering, vol 467. Springer, Singapore. https://doi.org/10.1007/978-981-10-7212-3_10
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DOI: https://doi.org/10.1007/978-981-10-7212-3_10
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