Dynamic Simulation and Experimental Investigation of Wave Energy Storage Using a Hybrid Hydraulic Energy Storage Device

ABSTRACT

A hybrid hydraulic energy storage device was innovatively designed by integrating the characteristics of spring‐type and heavy‐load energy storage structures. The dynamic response of this device within the wave energy storage system was analyzed from a macroscopic perspective by establishing a dynamic model and using irregular periodic waves as input conditions. The reliability of the proposed dynamic model was validated through experimental verification and dynamic simulations. Furthermore, optimization strategies were proposed to enhance the overall performance of the system, focusing on the hydraulic energy storage inlet, the spring energy storage module, and the heavy‐load energy storage module. Specifically, these strategies include installing a one‐way valve at the energy storage inlet, adjusting the maximum elastic force of the spring module to match the gravity of the heavy‐load module, and configuring the gravity of the heavy‐load module, and configuring the heavy‐load gravity as the operational load for the hydraulic energy storage mode. After implementing these optimization strategies, the energy storage efficiency was improved by approximately 29.2%. The dynamic simulation and module‐level optimization of the hybrid hydraulic energy storage device provide valuable insights and a potential reference for the engineering application of wave energy storage technologies.