Implementation and optimization of hydraulic wave energy generation system

波浪能 发电 储能 水力机械 风浪 海洋能源 能量转换 抽蓄发电 可再生能源 能量(信号处理) 工程类 功率(物理) 计算机科学 机械工程 电气工程 分布式发电 物理 量子力学 热力学
作者
Zhigang Liu,Shi Liu,Wen Chen,Yi Yang,Guoliang Feng
出处
期刊:PLOS ONE [Public Library of Science]
卷期号:19 (2): e0293209-e0293209 被引量:1
标识
DOI:10.1371/journal.pone.0293209
摘要

Wave energy is one of the primary sources of marine energy, representing a readily available and inexhaustible form of renewable clean energy. In recent years, wave energy generation has garnered increasing attention from researchers. To study wave energy generation technology, we have constructed a real wave energy generation system and designed wave simulation and hydraulic energy storage systems. The wave simulation system is mainly composed of a frequency converter and an electric boost pump, while the hydraulic energy storage system consists of a hydraulic control unit and hydraulic motors. Corresponding mathematical models have been established to investigate the characteristics of wave energy generation. Specifically, a mathematical model for wave input using the double-parameter JONSWAP wave spectrum has been created for wave simulation in the wave simulation system. For the hydraulic energy storage system, known as the Power Take Off (PTO) system, mathematical models have been developed for double-acting hydraulic cylinders, energy storage devices, and precise displacement hydraulic motors, taking into consideration fluid Reynolds numbers and leakage. During the generation of wave energy, there is a problem of prolonged power interruption when wave conditions are unfavorable, which hinders continuous power generation. To address this issue, a system structure with an energy storage unit and two parallel generator sets, as well as a power operation optimization scheme, have been proposed. This system structure and optimization approach efficiently and reasonably utilize wave energy, achieving the goal of uninterrupted power supply in the hydraulic wave energy generation system.
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