机械液压混合传动式风电机组功率控制技术研究
发布时间：2018-08-07 16:46
【摘要】：随着化石燃料燃烧带来的环境污染加剧及其储量的减少,全球对风能等可再生能源的开发利用越来越重视。风能是目前技术最成熟、最具规模化发展前景的可再生能源。近几年世界风力机新增装机容量持续攀升。风电装备的维护成本、运行可靠性和使用寿命等问题也随之日益受到关注,尤其传统风电机组存在齿轮箱故障率高、变流器技术复杂及谐波干扰等问题。也有液压传动式风电机组被研制出来,虽然可以弥补传统风电机组的一些缺陷,但是传动效率较低。本文提出基于机械液压混合传动的风力发电机组,通过合理配置系统参数,可以使得多数功率经机械传递,少数功率经液压传递,功率合流供给励磁同步发电机,几乎不对电网产生谐波干扰,减缓载荷冲击。该风力机不依靠传统的变流器控制发电机电磁转矩,而是通过控制变量泵排量来控制风轮转速,以捕获最大功率。同时,也可以调节发电机转速以满足并网要求。论文通过五个章节对机械液压混合传动式风力发电机组功率控制技术进行研究,五个章节的主要内容分别是：第一章介绍课题的研究背景,国内外风电发展现状以及风力机技术现状。提出课题研究意义和研究内容。第二章首先对机械液压混合传动结构方案论证,提出适合于风力机的机械液压混合传动方案。然后理论分析该传动系统的转速、功率、效率特性。提出基于该传动方式的并网转速控制和额定风速以下最大功率捕获方法。第三章建立该风力发电机组的动态模型,包括风速、风轮、混合传动系统、励磁同步发电机、电网模型。在AMESim中建立机械液压混合传动系统模型,验证其转速、功率、效率特性。以1.5 MW机械液压混合传动式并网风电机组为例,对主要部件进行参数计算,利用AMESim与MATLAB/simulink软件对机组运行工况进行联合仿真分析。仿真结果验证了机械液压混合传动在并网风电机组中的可行性,表明提出的机械液压混合传动式风力发电系统具有变速恒频控制方法简单、载荷冲击小、传动效率较高、电网友好性好等特点。第四章对30kW机械液压混合传动式风电机组的模拟试验系统进行研究,内容包括硬件选型、PLC控制系统设计、上位机程序设计等。经实验表明模拟风轮装置可以较快跟踪输入信号,转矩输出准确,较好地模拟风轮。上位机程序的数据显示、记录、与PLC和仪器的通信正常。第五章对课题的研究工作和成果总结,并对课题之后的研究方向和内容展望。
[Abstract]:With the increase of environmental pollution caused by fossil fuel combustion and the decrease of reserves, more and more attention has been paid to the development and utilization of renewable energy such as wind energy. Wind energy is the most mature technology and the most promising renewable energy. In recent years, the new installed capacity of wind turbines in the world continues to climb. The maintenance cost, operation reliability and service life of wind power equipment have been paid more and more attention, especially the problems of high gearbox failure rate, complicated converter technology and harmonic interference in traditional wind turbines. Some hydraulic wind turbines have been developed, although they can make up for some defects of traditional wind turbines, but the transmission efficiency is low. In this paper, it is put forward that the wind turbine based on mechanical hydraulic hybrid drive can make most of the power transfer through machinery, a few power through hydraulic transmission, and the combined power supply excitation synchronous generator through reasonable configuration of system parameters. There is almost no harmonic interference to the power grid, and the impact of load is mitigated. The wind turbine does not rely on the traditional converter to control the electromagnetic torque of the generator, but by controlling the displacement of the variable pump to control the speed of the wind turbine in order to capture the maximum power. At the same time, the speed of the generator can also be adjusted to meet the requirements of grid connection. In this paper, the power control technology of the mechanically hydraulic hybrid drive wind turbine is studied in five chapters. The main contents of the five chapters are as follows: chapter 1 introduces the research background of the subject. The current situation of wind power development and wind turbine technology at home and abroad. The significance and content of the research are put forward. In the second chapter, the structure of mechanical hydraulic hybrid transmission is demonstrated, and the mechanical hydraulic hybrid transmission scheme suitable for wind turbine is put forward. Then theoretical analysis of the transmission system speed, power, efficiency characteristics. This paper presents a grid-connected speed control and maximum power capture method under rated wind speed based on the transmission mode. In chapter 3, the dynamic model of the wind turbine is established, including wind speed, wind turbine, hybrid drive system, excitation synchronous generator and grid model. The model of mechanical hydraulic hybrid transmission system is established in AMESim to verify its rotational speed, power and efficiency characteristics. Taking 1.5 MW mechanically hydraulic hybrid transmission wind turbine as an example, the parameters of main components are calculated, and the operating conditions of the unit are simulated and analyzed by AMESim and MATLAB/simulink software. The simulation results verify the feasibility of mechanical hydraulic hybrid transmission in grid-connected wind turbine. It shows that the proposed mechanical-hydraulic hybrid drive wind power generation system has the advantages of simple variable speed constant frequency control method, low load impact and high transmission efficiency. Power grid friendly and other characteristics. In the fourth chapter, the simulation test system of 30kW mechanical hydraulic hybrid drive wind turbine is studied, including hardware selection and PLC control system design, upper computer program design and so on. The experimental results show that the analog wind turbine device can track the input signal quickly, and the torque output is accurate and the wind turbine can be simulated well. PC program data display, record, and PLC and the instrument communication is normal. The fifth chapter summarizes the research work and results of the subject, and looks forward to the research direction and content after the subject.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM315
[Abstract]:With the increase of environmental pollution caused by fossil fuel combustion and the decrease of reserves, more and more attention has been paid to the development and utilization of renewable energy such as wind energy. Wind energy is the most mature technology and the most promising renewable energy. In recent years, the new installed capacity of wind turbines in the world continues to climb. The maintenance cost, operation reliability and service life of wind power equipment have been paid more and more attention, especially the problems of high gearbox failure rate, complicated converter technology and harmonic interference in traditional wind turbines. Some hydraulic wind turbines have been developed, although they can make up for some defects of traditional wind turbines, but the transmission efficiency is low. In this paper, it is put forward that the wind turbine based on mechanical hydraulic hybrid drive can make most of the power transfer through machinery, a few power through hydraulic transmission, and the combined power supply excitation synchronous generator through reasonable configuration of system parameters. There is almost no harmonic interference to the power grid, and the impact of load is mitigated. The wind turbine does not rely on the traditional converter to control the electromagnetic torque of the generator, but by controlling the displacement of the variable pump to control the speed of the wind turbine in order to capture the maximum power. At the same time, the speed of the generator can also be adjusted to meet the requirements of grid connection. In this paper, the power control technology of the mechanically hydraulic hybrid drive wind turbine is studied in five chapters. The main contents of the five chapters are as follows: chapter 1 introduces the research background of the subject. The current situation of wind power development and wind turbine technology at home and abroad. The significance and content of the research are put forward. In the second chapter, the structure of mechanical hydraulic hybrid transmission is demonstrated, and the mechanical hydraulic hybrid transmission scheme suitable for wind turbine is put forward. Then theoretical analysis of the transmission system speed, power, efficiency characteristics. This paper presents a grid-connected speed control and maximum power capture method under rated wind speed based on the transmission mode. In chapter 3, the dynamic model of the wind turbine is established, including wind speed, wind turbine, hybrid drive system, excitation synchronous generator and grid model. The model of mechanical hydraulic hybrid transmission system is established in AMESim to verify its rotational speed, power and efficiency characteristics. Taking 1.5 MW mechanically hydraulic hybrid transmission wind turbine as an example, the parameters of main components are calculated, and the operating conditions of the unit are simulated and analyzed by AMESim and MATLAB/simulink software. The simulation results verify the feasibility of mechanical hydraulic hybrid transmission in grid-connected wind turbine. It shows that the proposed mechanical-hydraulic hybrid drive wind power generation system has the advantages of simple variable speed constant frequency control method, low load impact and high transmission efficiency. Power grid friendly and other characteristics. In the fourth chapter, the simulation test system of 30kW mechanical hydraulic hybrid drive wind turbine is studied, including hardware selection and PLC control system design, upper computer program design and so on. The experimental results show that the analog wind turbine device can track the input signal quickly, and the torque output is accurate and the wind turbine can be simulated well. PC program data display, record, and PLC and the instrument communication is normal. The fifth chapter summarizes the research work and results of the subject, and looks forward to the research direction and content after the subject.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM315
【参考文献】
相关期刊论文 前2条
1 苏晓;;印度风电发展情况分析[J];风能;2013年12期
2 侯U喨，
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