POWER CONVERTER AND MPPT CONTROL FOR HIGH SPEED SWITCHED RELUCTANCE WIND TURBINE

Sun Guanqun; Lyu Yiru; Wang Xin'gang; Dong Wenjuan; Guo Jinlong; Li Gang

doi:10.19912/j.0254-0096.tynxb.2024-0267

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (6) : 567-575. DOI: 10.19912/j.0254-0096.tynxb.2024-0267

POWER CONVERTER AND MPPT CONTROL FOR HIGH SPEED SWITCHED RELUCTANCE WIND TURBINE

Sun Guanqun¹, Lyu Yiru², Wang Xin'gang³, Dong Wenjuan³, Guo Jinlong⁴, Li Gang¹

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Abstract

Aiming atthe maximum power point tracking （MPPT） of Variable excitation voltage control problem of switched reluctance generator （SRG） under variable speed wind power generation conditions is discussed in this article. In order to explore the phase current problem of direct control SRG generation stage, the multivariable control problem when the switching angle is not fixed, and the effectiveness of high-speed operation and continuous conduction mode （CCM） are explored in this article. Firstly, a new type of SRG power converter is proposed, which is composed of a forced excitation direct voltage rise main circuit and a variable excitation voltage excitation circuit. Its working process is described in detail, and the relevant mathematical model of SRG is derived, and the relevant theoretical characteristics are analyzed. In terms of control strategy, a global single variable excitation voltage disturbance method below base speed is proposed as MPPT control method, and a new excitation voltage disturbance model is given. In addition to the excitation stage, the phase current can be directly adjusted through excitation voltage transformation in the generation stage under the support of the new power converter; In the aspect of switch angle control strategy, the control model of automatic on-line fast linear regulation of turn-on angle and turn-off angle with speed is given. Thus, after coupling multiple traditional controllable variables, MPPT control is implemented only with the excitation voltage as a single variable. Pitch angle is introduced to control constant power output above base speed. The detection quantity in the whole working area is only rotor position （speed） and power. The effectiveness of the new power converter and control strategy under high-speed CCM operation is verified by simulation and experiment, and compared with the results of two existing variable excitation voltage MPPT.

Key words

wind power / switched reluctance generator / maximum power point tracking / continuous conduction mode / power converter / excitation voltage disturbance method / switch angle control

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Sun Guanqun, Lyu Yiru, Wang Xin'gang, Dong Wenjuan, Guo Jinlong, Li Gang. POWER CONVERTER AND MPPT CONTROL FOR HIGH SPEED SWITCHED RELUCTANCE WIND TURBINE[J]. Acta Energiae Solaris Sinica. 2025, 46(6): 567-575 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0267

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