PASSIVE-SLIDING MODE CONTROL STRATEGY OF DIRECT-DRIVE WAVE POWER SYSTEM

Qiu Meng; Yang Junhua; Lin Huijin; Xie Zisen; Huang Weibang

doi:10.19912/j.0254-0096.tynxb.2021-0448

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Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (10) : 357-363. DOI: 10.19912/j.0254-0096.tynxb.2021-0448

PASSIVE-SLIDING MODE CONTROL STRATEGY OF DIRECT-DRIVE WAVE POWER SYSTEM

Qiu Meng, Yang Junhua, Lin Huijin, Xie Zisen, Huang Weibang

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Abstract

For the direct-drive wave power system whose input excitation is irregular wave, a passive-sliding mode control strategy is proposed. The bilinear amplitude method is used to calculate the dominant frequency of irregular waves, combined with the wave energy capture strategy to obtain the desired tracking curve, design a passive controller to track the desired curve in real time. In order to reduce the influence of external disturbances and improve the stability of the system, a sliding mode control strategy is introduced to ensure that the system is passive. The resulting impact improves system stability. The expanded state observer is used to replace the speed sensor to realize the identification of the mover's speed. The simulation results show that the bilinear amplitude method can realize the dominant frequency estimation of irregular waves, the speed error observed by the expanded state observer is small, and the proposed control scheme can quickly respond to the expected current changes, accurately track the expected curve, and has strong robustness.

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Qiu Meng, Yang Junhua, Lin Huijin, Xie Zisen, Huang Weibang. PASSIVE-SLIDING MODE CONTROL STRATEGY OF DIRECT-DRIVE WAVE POWER SYSTEM[J]. Acta Energiae Solaris Sinica. 2022, 43(10): 357-363 https://doi.org/10.19912/j.0254-0096.tynxb.2021-0448

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