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山东大学学报 (工学版) ›› 2021, Vol. 51 ›› Issue (6): 1-8.doi: 10.6040/j.issn.1672-3961.0.2020.429

• 机械工程——海洋工程与技术专题 •    

液压蓄能式波浪能发电装置关键参数分析

刘颖昕1(),秦健1,刘延俊1,2,*()   

  1. 1. 山东大学海洋研究院, 山东 青岛 266237
    2. 高效洁净机械制造教育部重点实验室, 山东 济南 250061
  • 收稿日期:2020-10-23 出版日期:2021-12-20 发布日期:2022-01-19
  • 通讯作者: 刘延俊 E-mail:liuyingxin0628@163.com;lyj111ky@163.com
  • 作者简介:刘颖昕(1996—)，女，山东济南人，硕士研究生，主要研究方向为海洋可再生能源装备研发. E-mail: liuyingxin0628@163.com
  • 基金资助:
    山东省重大科技创新工程资助项目(2018CXGC0104);国家自然科学基金资助项目(U1706230);国家电网公司总部资助科技项目(5400-201916148A-0-0-00);国家重点研发计划资助项目(2016YFE0205700)

The analysis of key parameters of hydraulic energy storage system of wave energy converter

Yingxin LIU1(),Jian QIN1,Yanjun LIU1,2,*()   

  1. 1. Institute of Marine Science and Technology, Shandong University, Qingdao 266237, Shandong, China
    2. Key laboratory of High Efficiency and Clean Mechanical Manufacture of Ministry of Education, Jinan 250061, Shandong, China
  • Received:2020-10-23 Online:2021-12-20 Published:2022-01-19
  • Contact: Yanjun LIU E-mail:liuyingxin0628@163.com;lyj111ky@163.com

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摘要：

针对波浪能发电效率低的问题, 建立由波浪输入至马达输出的系统数学模型, 采用理论建模和仿真分析相结合的方式确定影响系统发电功率的关键参数, 为提高装置发电效率的液压能量转换系统恒转速控制策略的研究提供理论指导。波浪能发电的液压蓄能式波浪能发电系统主要由3部分组成, 建立系统各元件的运动方程及能量方程, 寻找元件间的连接参数建立系统数学模型, 通过理论分析系统功率方程定性地确定系统工作特性及关键参数。为验证理论分析结果的准确性, 借助AMEsim仿真平台完成系统设计及仿真验证。结果表明, 马达输出功率主要受波浪波高、周期、比例流量阀流通面积及马达排量的影响, 最高影响阶次分别为1次方、4次方、4次方和2次方。仿真验证还证明蓄能器预充气压力几乎不会对马达输出功率产生影响。

关键词: 波浪能发电, 液压蓄能式, 分析模型, 仿真平台, 元件工作参数

Abstract:

To improve the efficiency of wave power generation technology, a mathematical model of the system from wave input to motor output was established. The key parameters that affected the system′s power generation capacity were analyzed by using theoretical modeling and simulating, so as to provide theoretical guidance for the research of the constant speed control strategy of the hydraulic energy conversion system. The hydraulic energy storage system of wave energy generation was composed of 3 parts. The mathematical model of the system was established by analyzing each component′s motion equation and energy equation, and finding the connection parameters between the two components. The key parameters and characteristics of the system were determined qualitatively by analyzing the system′s power equation. To confirm the accuracy of theoretical analysis, the AMEsim simulation platform was used to design and imitate the system. The results showed that the motor′s output power was affected by the height of the wave, period, flow area of the proportional flow valve and the motor displacement. The highest order of the influence was 1, 4, 4 and 2, respectively. The results also verified that the precharging pressure of the accumulator had little influence on the motor′s output power.

Key words: wave energy conversion, hydraulic energy storage, analytical model, simulation platform, operating parameter of component

中图分类号: 

  • P74

图1

波浪能发电装置结构简图"

图2

置于波浪中的浮子示意图"

图3

浮子-活塞受力分析"

表1

浮子的关键参数"

外径D1/m 内径D2/m 总高L/m 吃水深度d/m 质量mt/kg
3.21 1.61 1.00 0.50 3 115.12

图4

波浪能发电系统仿真模型"

图5

系统压力时间变化曲线"

图6

功率随时间变化曲线"

图7

波浪波高-功率曲线"

图8

蓄能器预充气压力-功率曲线"

图9

波浪周期-功率曲线"

图10

马达排量-功率曲线"

图11

流量阀通流面积-功率曲线"

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