FAST SUPER-TWISTING MULTI-QUASI-RESONANT SLIDING MODE CONTROL FOR CASCADED H-BRIDGE RECTIFIERS IN HYBRID MICROGRIDS

Tao Haijun; Zhang Chenjie; Zheng Zheng; Zhao Meng&#x02019;en; Song Jiayao; Zhang Guopeng

doi:10.19912/j.0254-0096.tynxb.2024-0045

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (5) : 119-127. DOI: 10.19912/j.0254-0096.tynxb.2024-0045

FAST SUPER-TWISTING MULTI-QUASI-RESONANT SLIDING MODE CONTROL FOR CASCADED H-BRIDGE RECTIFIERS IN HYBRID MICROGRIDS

Tao Haijun^1,2, Zhang Chenjie¹, Zheng Zheng^1,2, Zhao Meng’en¹, Song Jiayao¹, Zhang Guopeng^1,2

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Abstract

In order to solve the problems of the cascaded H-bridge rectifiers, such as the existence of large overshoot of DC-side voltage and low-order harmonic distortion of grid current during sudden load changes, a fast super-twisting multi-quasi-resonant sliding mode algorithm is proposed. Firstly, the mathematical model of the cascaded H-bridge rectifier in the dq rotating coordinate system is established, and the law of the harmonic distribution of the grid current of the cascaded H-bridge rectifiers is deduced and its dynamic characteristics are analyzed. Secondly, a fast super-twisting multi-quasi-resonant sliding mode inner-loop controller is designed by combining the fast super-twisting multi-resonant sliding mode control and multi-quasi-resonant control, and then the design equations of the fast super-twisting multi-resonant sliding mode are deduced, and the stability is verified using the Lyapunov function. The experimental results show that the proposed control strategy has smaller voltage overshoot and shorter dynamic response time, which significantly reduces the grid current distortion rate.

Key words

the Lyapunov function / cascaded H-bridge rectifiers / harmonic distortion / super-twisting sliding mode control / quasi-resonant control

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Tao Haijun, Zhang Chenjie, Zheng Zheng, Zhao Meng’en, Song Jiayao, Zhang Guopeng. FAST SUPER-TWISTING MULTI-QUASI-RESONANT SLIDING MODE CONTROL FOR CASCADED H-BRIDGE RECTIFIERS IN HYBRID MICROGRIDS[J]. Acta Energiae Solaris Sinica. 2025, 46(5): 119-127 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0045

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