POWER TRACKING CONTROL METHOD BASED ON HIGH-FREQUENCY RECTIFICATION FOR HYDRAULIC ENERGY STORAGE WAVE ENERGY CONVERTER

Gao Dongzhao; Wang Kunlin; Sheng Songwei; Ye Yin; Wang Zhenpeng; Wang Wensheng

doi:10.19912/j.0254-0096.tynxb.2024-0280

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (6) : 700-705. DOI: 10.19912/j.0254-0096.tynxb.2024-0280

POWER TRACKING CONTROL METHOD BASED ON HIGH-FREQUENCY RECTIFICATION FOR HYDRAULIC ENERGY STORAGE WAVE ENERGY CONVERTER

Gao Dongzhao^1,2, Wang Kunlin^2-4, Sheng Songwei^2-4, Ye Yin^2-4, Wang Zhenpeng^2-4, Wang Wensheng^2-4

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Abstract

The hydraulic energy storage wave energy converter is unable to achieve maximum power point tracking due to the decoupling effect of accumulators. In addition, the hydraulic generator sets with uncontrollable rectification mode result in the frequent starts and stops, uncontrollable power output, and failure to adaptively track the incoming wave power. Therefore, a power tracking control method based on high-frequency rectification is proposed. The mathematical models of the hydraulic energy storage power generation system and pressure load are established. On this basis, the generator speed is controlled by a high-frequency rectifier, thereby improving the output characteristics of the hydraulic power generation system. It achieves automatic tracking of the incoming wave power by the hydraulic generator set within the power variation range. The simulation test results indicate that the input flow of the hydraulic motor rate can automatically track the output flow rate of the hydraulic cylinders, and the system pressure can automatically match the incoming wave power. Therefore, the power tracking control method enhances the characteristics of the hydraulic generator set of the wave energy converter and reduces the starts and stops, thereby achieving both wave power tracking and adaptive load regulation. It is beneficial in promoting the further research on the hydraulic energy storage wave energy converter.

Key words

wave energy converter / power control / flow rate / hydraulic generator set / power tracking / load matching

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Gao Dongzhao, Wang Kunlin, Sheng Songwei, Ye Yin, Wang Zhenpeng, Wang Wensheng. POWER TRACKING CONTROL METHOD BASED ON HIGH-FREQUENCY RECTIFICATION FOR HYDRAULIC ENERGY STORAGE WAVE ENERGY CONVERTER[J]. Acta Energiae Solaris Sinica. 2025, 46(6): 700-705 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0280

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