MPPT CONTROL OF PHOTOVOLTAIC SYSTEM BASED ON FITTING BACKSTEPPING SLIDING MODE METHOD

Wang Renming; Zhang Mingrui; Bao Gang; Liu Wenzhong; Yang Jie

doi:10.19912/j.0254-0096.tynxb.2022-0487

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Acta Energiae Solaris Sinica ›› 2023, Vol. 44 ›› Issue (8) : 224-231. DOI: 10.19912/j.0254-0096.tynxb.2022-0487

MPPT CONTROL OF PHOTOVOLTAIC SYSTEM BASED ON FITTING BACKSTEPPING SLIDING MODE METHOD

Wang Renming, Zhang Mingrui, Bao Gang, Liu Wenzhong, Yang Jie

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Abstract

A hybrid MPPT scheme based on fitting optimization backstepping sliding mode control is proposed in this paper. Firstly, the scheme is based on the P-V characteristic curve of photovoltaic power generation system. The cubic interpolation function is used to fit the reference voltage at the maximum power point V_ref. Then, based on the V_ref and backstepping sliding mode control principle, a controller is designed and the duty cycle is controlled by PWM modulation, so that the controller can track the maximum power point quickly and effectively under different environmental conditions. Finally, the effectiveness of the proposed scheme is verified by Matlab/Simulink simulation, and compared with other classical methods. The results show that the method has high tracking speed, low steady-state power fluctuation and better tracking performance.

Key words

photovoltaic arrays / photovoltaic power generation / maximum power point tracking（MPPT） / surface fitting / backstepping sliding mode control

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Wang Renming, Zhang Mingrui, Bao Gang, Liu Wenzhong, Yang Jie. MPPT CONTROL OF PHOTOVOLTAIC SYSTEM BASED ON FITTING BACKSTEPPING SLIDING MODE METHOD[J]. Acta Energiae Solaris Sinica. 2023, 44(8): 224-231 https://doi.org/10.19912/j.0254-0096.tynxb.2022-0487

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