基于负载口独立的液压式波浪能转换器捕获性能研究  

Power-capture Performance of the Hydraulic-type Wave Energy Converter Based on the Individual Metering Technology

作　　者：刘常海 赵志学 胡敏 燕浩 杨庆俊[3] 包钢[3] 曾亿山[1] LIU Changhai;ZHAO Zhixue;HU Min;YAN Hao;YANG Qingjun;BAO Gang;ZENG Yishan(School of Mechanical Engineering,Hefei University of Technology,Hefei 230009;State Key Laboratory of Fluid Power and Mechatronic Systems,Zhejiang University,Hangzhou 310027;School of Mechatronics Engineering,Harbin Institute of Technology,Harbin 150001)

机构地区：[1]合肥工业大学机械工程学院,合肥230009 [2]浙江大学流体动力与机电系统国家重点实验室,杭州310027 [3]哈尔滨工业大学机电工程学院,哈尔滨150001

出　　处：《机械工程学报》2024年第6期386-397,共12页Journal of Mechanical Engineering

基　　金：国家自然科学基金(52005144、51905139、52075139);中央高校基本科研业务费(JZ2022HGTB0272、JZ2021HGB0090);流体动力与机电系统国家重点实验室开放基金课题(GZKF-202015)资助项目。

摘　　要：为提高液压式波浪能转换装置的运行特性,提出一种基于负载口独立的液压式波浪能提能系统。以筏式波浪能转换装置为例,建立浮子水动力模型和非线性液压提能系统数学模型,结合实际海域波浪的特点,在不规则波下对其动力响应进行研究,探究不规则波浪参数和液压提能系统参数对装置捕获性能的影响规律。结果表明,基于负载口独立的液压式波浪能提能系统,可较大程度地提高装置的捕获性能;在同一峰值波浪周期下,有义波高越大装置的捕获宽度比越大;在同一有义波高下,随着峰值波浪周期的增大,捕获宽度比先增大后减小;随着液压缸活塞面积、液压缸铰接距离和发电机等效阻尼系数的增大,捕获宽度比增大;随着液压缸活塞杆面积与活塞面积比、液压马达排量的增大,捕获宽度比减小;高压蓄能器预充气压力对捕获宽度比几乎无影响,高压蓄能器初始体积越大,捕获宽度比略减小。A novel hydraulic power take-off(Power take-off system,PTO)system based on the individual metering technology is proposed to improve the performance of the hydraulic-type wave energy converters(Wave energy converters,WECs).A raft-type WEC is focused on here,and the hydrodynamic model of the floater and the nonlinear model of the hydraulic PTO system are presented.Considering the characteristics of real ocean waves,the power-capture performance of the WEC in irregular waves is discussed,and the influence of wave parameters and PTO parameter configuration on the power-capture performance is investigated.Results show that the novel hydraulic PTO system can significantly improve power-capture performance of the WEC.For a certain peak wave period,the larger the significant wave height,the higher the capture width ratio.For a certain significant wave height,the capture width ratio increases first and then decreases after reaching a peak value with increasing peak wave period.The capture width ratio increases monotonously with increasing piston area of hydraulic cylinder,mounting position of hydraulic cylinder,and effective damping of generator,while it decreases monotonously with increasing displacement of hydraulic motor and rod-to-piston area ratio of hydraulic cylinder.The pre-charge pressure of the high-pressure gas accumulator makes no difference to the capture width ratio,while larger value of initial volume of the high-pressure gas accumulator gives slightly smaller capture width ratio.

关 键 词：负载口独立 液压系统 波浪能 提能系统 捕获性能 

分 类 号：TH137[机械工程—机械制造及自动化] TK79[动力工程及工程热物理—流体机械及工程]