【作者】 赵伟；

【导师】 顾煜炯；

【作者基本信息】 华北电力大学 ， 热能工程， 2015， 硕士

【摘要】 随着传统能源危机的加剧,可再生能源的利用越来越受到人们的关注,海洋能源因其能源密度大,逐步受到人类的重视,综合开发利用海洋多种能源是可再生能源利用的一个重要的发展趋势。本文主要研究海上风能与波浪能的综合开发利用,利用液压传动系统来进行能源的转换与传递,通过建模仿真及实验分析液压传动型海上风浪互补发电机组转速控制问题。本文首先根据项目要求,先后对风力发电和波浪发电的液压传动系统进行了详细的设计分析,最终确立了风力发电液压系统方案和波浪发电液压传动系统方案,并分别对风力、波浪发电液压系统各元件进行了参数计算及选型,完成了液压元件的选型工作,为搭建海上风浪能发电实验样机和工程样机奠下了基础。接下来,详细介绍了液压型风力发电机组转速控制原理,即通过采用变量泵控马达液压容积调速式回路控制马达转速稳定,建立了风轮、泵-马达回路、液压泵变量控制机构、发电机的数学模型,并在AMESIM和SIMULINK软件环境下建立联合仿真模型,进行联合仿真,仿真结果表明,通过容积调速回路能实现发电机组的输出转速稳定。然后对波浪发电机组转速控制的基本原理进行了阐述,即采用多浮子发电技术和蓄能稳压技术使机组转速稳定,并对波浪发电液压系统建立了数学模型及仿真模型,利用AMESIM软件完成了对波浪发电机组转速控制的仿真研究,同时进行了风浪互补发电机组的转速控制仿真研究,通过系统仿真工作曲线可看出,在蓄能器的缓冲作用以及液压系统容积调速回路的作用,可实现发电机组转速的基本稳定。最后对液压型风力发电机组进行了模拟实验研究,为系统的设计及优化提供了理论和实验数据,验证了液压控制系统能够达到使风力发电机组转速恒定的要求。同时进行了波浪发电系统海上试验研究,实验结果表明液压传动系统采用带蓄能器时可以平缓波浪能能量的波动,利用变量马达的排量调节可以控制波浪发电机组转速恒定。更多还原

【Abstract】 With the intensification of traditional energy crisis, people pay more and more attention to the utilization of the renewable energy, and as a sustainable energy which has largely exploitation prospects with large density, ocean energy is gradually paid more attention, therefore, comprehensive exploitation and utilization of ocean energy resources is an important trend of renewable energy utilization.This paper mostly studies the comprehensive development and utilization of the offshore wind and wave energy, and using hydraulic transmission systems for energy conversion and transmission, and focusing on the speed-control in the wind energy and wave energy complementary power generation unit with hydraulic transmission through modeling simulation and experimental analysis.Firstly, there is a theoretical study and optimization design for hydraulic drive system of wind and wave power generation, and establishes the hydraulic system scheme finally. In addition, calculates the parameters of hydraulic components of the wind and wave power generation, and carries out the main hydraulic elements selection to lay the foundation of experimental and engineering prototype.Next, this paper introduces the hydraulic type wind turbine speed control principle, namely through the adoption of the variable pump to control the motor speed stability, and then the mathematical models of wind turbine, pump-motor loop, variable hydraulic control mechanism and the generator are establised completing the hydraulic motor velocity control through AMESim-Simulink co-simulation analysis.Thirdly, the speed control principle of wave power generation is introduced, that is through the adoption of the variablemotor and multi-float power technology to control the motor speed stability. The mathematical models of hydraulic system of wave power generation are establised completing the hydraulic motor velocity control through AMESim simulation analysis. Meanwhile, the simulation analysis of speed-control in the wind energy and wave energy power unit with hydraulic transmission is establised and the results show that hydraulic system can keep wave generator speed under control.Finally, the experimental research is conducted on the hydraulic type of wind turbine and sea wave power system test research, and experimental results show that the hydraulic drive system with accumulator and displacement of hydraulic motor can keep wave generator speed under control.更多还原