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논문 기본 정보

자료유형
학술저널
저자정보
Hongbo Qiu (Zhengzhou University of Light Industry) Xiaobin Fan (Zhengzhou University of Light Industry) Jianqin Feng (Zhengzhou University of Light Industry) Cunxiang Yang (Zhengzhou University of Light Industry)
저널정보
전력전자학회 JOURNAL OF POWER ELECTRONICS JOURNAL OF POWER ELECTRONICS Vol.18 No.5
발행연도
2018.9
수록면
1,577 - 1,584 (8page)

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초록· 키워드

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The content of harmonic current increases with an increase in the number of power electronic devices in power grid. When a generator is directly connected to the power grid through a step-up transformer, the influence of the harmonic currents on the generator is inevitable. To study the influences of harmonics on generators, a 24-MW bulb tubular turbine generator is taken as an example in this paper. A 2-D transient electromagnetic field model is established. Through a comparative analysis of the data of experiments and simulations, the correctness of the model is verified. The values of the air gap magnetic density, torque and losses of the generator under various conditions are calculated using the finite element method. Taking the rated condition as a reference, the influence of the harmonic currents on the magnetic flux density is analyzed. It is confirmed that the time harmonic is a key factor affecting the generator performance. At the same time, the effects of harmonic currents on the torque ripple, average torque and eddy current loss of the generator are studied, and the mechanism of the variation of the eddy current loss is also discussed.

목차

Abstract
I. INTRODUCTION
II. ESTABLISHMENT AND VALIDATION OF THE MODEL
III. ANALYSIS OF HARMONIC CURRENTS
IV. THE INFLUENCE OF HARMONIC CURRENTS ONMAGNETIC FLUX DENSITY
V. THE INFLUENCE OF HARMONIC CURRENTS ON TORQUE
VI. THE INFLUENCE OF HARMONIC CURRENTS ONGENERATOR LOSSES
VII. CONCLUSIONS
REFERENCES

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