Constant frequency adaptive hysteresis control of grid-connected inverter

Yingqian Ni; Tingting Ren; Xuemei Yang; Lingjian Zeng; Cheng Zeng

doi:10.1117/12.3025156

8 February 2024 Constant frequency adaptive hysteresis control of grid-connected inverter

Yingqian Ni, Tingting Ren, Xuemei Yang, Lingjian Zeng, Cheng Zeng

Proceedings Volume 13066, International Conference on Optoelectronic Materials and Devices (ICOMD 2023); 130661D (2024) https://doi.org/10.1117/12.3025156
Event: 2023 International Conference on Optoelectronic Materials and Devices (COMD 2023), 2023, Chongqing, China

Abstract

This article introduces the basic principles of traditional hysteresis control methods, deduces the relationship between switching frequency and hysteresis loop width, and analyzes and studies the reasons for the unstable switching frequency under hysteresis control, as well as the impact of switching frequency on control accuracy. On this basis, a constant frequency adaptive hysteresis control is proposed. When deriving the formula for calculating the loop width, the reference current slope is taken into consideration, and the relationship between the inductor current on the grid-connected side during the rising and falling phases and the loop width is expressed in sections, thereby achieving real-time regulation of the loop width to ensure constant switching frequency. Finally, simulation results confirm that using this method can achieve a fixed switching frequency in inverter grid connection, and achieve high tracking accuracy under high-frequency switching.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Yingqian Ni, Tingting Ren, Xuemei Yang, Lingjian Zeng, and Cheng Zeng "Constant frequency adaptive hysteresis control of grid-connected inverter", Proc. SPIE 13066, International Conference on Optoelectronic Materials and Devices (ICOMD 2023), 130661D (8 February 2024); https://doi.org/10.1117/12.3025156

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