Analysis of electromagnetic coupling characteristics for doubly-fed induction generator based on multi-frequency pole pairs' magnetic field coupling

被引：0

作者：

Luo H. ^{[1
,2
,3
,4
]}

Xu X. ^{[1
]}

Shi Z. ^{[5
]}

Zhao J. ^{[2
]}

Liu H. ^{[1
,3
]}

机构：

[1] School of Electric Power Engineering, Nanjing Institute of Technology, Nanjing

[2] RENergy Electric Tianjin Ltd., Tianjin

[3] Jiangsu Collaborative Innovation Center of Smart Distribution Network, Nanjing

[4] College of Electrical Engineering, Zhejiang University, Hangzhou

[5] Nari-Relays Electric Co., Ltd., Nanjing

来源：

Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2021年 / 41卷 / 02期

基金：

中国博士后科学基金;

关键词：

Fractional-slot concentrated windings; Harmonic magnetic motive force; Multi-frequency pole pairs' magnetic field coupling; Winding factor of harmonic magnetic field;

D O I：

10.16081/j.epae.202012029

中图分类号：

学科分类号：

摘要：

The direct-drive cannot be realized by increasing pole-pairs for traditional DFIG(Doubly-Fed Induction Generator). The pole pairs' magnetic field spectrum of FSCW(Fractional-Slot Concentrated Windings) is analyzed, and a kind of transmission scheme of multi-frequency pole pairs' magnetic field coupling based direct-driving type DFIG are proposed, which realizes electromagnetic coupling by pole pairs' dominant component. Aiming at the problem that there is no general mathematical calculation method for winding factor of FSCW under different pole-slot ratio, the general winding factor calculation method of three categories of pole-slot ratios are deduced through the synthesis of excitation magneto-motive force. The expressions of inductance, flux linkage and induced voltage corresponding to each harmonic magnetic field are derived based on Fourier series of the number of stator and rotor turns and winding functions, the influence of magnetic field on generator parameters is analyzed. A design method of double rotor motor pole slot based on the specific pole pairs' mutual inductance value is proposed. By comparing the results of mathematical analysis and finite element calculation, the correctness of the coupling theory of the proposed multi-frequency pole pairs' magnetic field and the drive principle of direct-driving type DFIG is verified. © 2021, Electric Power Automation Equipment Press. All right reserved.

引用

页码：159 / 165

页数：6

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