SIMULATION EXPERIMENTAL STUDY OF WAVE ENERGY CONVERTER PTO SYSTEM BASED ON MULTI-STAGE ENERGY STORAGE

Sun Chongfei; Teng Huaiyu; Yang Yang; Chen Hailong; Li Xin; Wang Xuerui

doi:10.19912/j.0254-0096.tynxb.2024-2127

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (4) : 478-488. DOI: 10.19912/j.0254-0096.tynxb.2024-2127

SIMULATION EXPERIMENTAL STUDY OF WAVE ENERGY CONVERTER PTO SYSTEM BASED ON MULTI-STAGE ENERGY STORAGE

Sun Chongfei^1,2, Teng Huaiyu^1,2, Yang Yang³, Chen Hailong^1,2, Li Xin^1,4, Wang Xuerui^1,2

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Abstract

In order to improve the operating efficiency of hydraulic wave energy converters （WECs）, this paper proposes a multistage energy storage hydraulic PTO system, which achieves multistage energy storage through accumulators and energy storage flywheels. A hydraulic PTO simulation model is established in AMESim to study the impact of energy storage components on system response and analyze the power generation process under different sea conditions. Meanwhile, a scaled hydraulic PTO prototype with a rated power of 100 W is built for performance testing. The study shows that, under medium and low sea conditions, the average conversion efficiency from hydraulic energy to electrical energy reaches 89%, which is 6% higher than the system without the multistage energy storage technology. Under high sea conditions, when energy overflow is triggered, the system can still achieve the 5 kW rated power generation target. The scaled-down prototype's power generation efficiency can reach 45.6%, which is close to the rated 100 W power generation requirement. The simulation and testing methods used in this study can also be extended to other wave energy converter hydraulic PTO systems, providing a basis for parameter optimization and performance improvement of wave energy devices under different sea conditions.

Key words

wave energy conversion / hydraulic energy storage / design of experiments / PTO damping / AMESim / conversion efficiency

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Sun Chongfei, Teng Huaiyu, Yang Yang, Chen Hailong, Li Xin, Wang Xuerui. SIMULATION EXPERIMENTAL STUDY OF WAVE ENERGY CONVERTER PTO SYSTEM BASED ON MULTI-STAGE ENERGY STORAGE[J]. Acta Energiae Solaris Sinica. 2026, 47(4): 478-488 https://doi.org/10.19912/j.0254-0096.tynxb.2024-2127

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