Initial Rotor Position Estimation Method of Three-stage Synchronous Starter/Generator Based on Excitation Voltage Square Wave Modulation

被引：0
|
作者：
Zhang X. [1 ]
Liu W. [1 ]
Jiao N. [1 ]
Mao S. [1 ]
Yao P. [1 ]
机构：
[1] School of Automation, Northwestern Polytechnical University, Shaanxi Province, Xi’an
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2024年 / 44卷 / 10期
基金：
中国国家自然科学基金;
关键词：
excitation voltage square wave modulation; initial rotor position estimation; three-stage synchronous starter/generator; variance; virtual angle;
D O I：
10.13334/j.0258-8013.pcsee.230266
中图分类号：
学科分类号：
摘要：
The existing three-stage synchronous starting/generator initial rotor position estimation methods based on high-frequency injection face failure risk due to high-frequency attenuation. Based on the mutual inductance between the stator and rotor of the main motor, this paper proposes a three-stage synchronous starting/generator initial rotor position estimation method based on the excitation voltage square wave modulation. The excitation voltage is used as the carrier wave, and the low-frequency response current at the stator side of the main motor is extracted for the initial rotor position estimation after the low-frequency square wave modulation. When the three-phase lower tube of the stator inverter is activated, the method comprises into two steps: first, the excitation voltage is modulated by low-frequency square wave, and the low-frequency induction current of the stator of the main motor is collected to pre-estimate the initial position of the rotor; Second, by pre-estimating the initial position, the relevant current characteristics before and after the excitation voltage outage are analyzed to obtain the final initial position containing the magnetic pole information. The proposed method processes the collected low frequency current through virtual angle transformation and variance. Experiments show that the proposed method has high estimation accuracy. ©2024 Chin.Soc.for Elec.Eng.
引用
收藏
页码：4073 / 4081
页数：8
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