基于“腾讯会议”和“优慕课在线平台”的风电机组设计与制造混合式教学

风电机组设计与制造课程是一门新兴的课程,其涉及的知识内容多、跨度大、难度高。本课程采用混合式教学模式,使得学生享受在线教学优势的同时,也能从类似传统课堂教学中的师生互动中收益。本混合式教学以培养未来工程师、启迪未来研究者作为贯穿课程设计的总体教学目标,在课程单元划分、课程单元设计、课程考核方式设计等方面提前制定了科学、详尽的方案。采用了线上直播、签到、点名、在线测试、在线课后作业、线上点播、论坛发帖、即时通讯软件小组讨论等多样的教学执行方式,并以在线测试、在线课后作业、论坛发帖等作为教学检测方式,杜绝了考前突击式学习,保证了学生的学习质量、兴趣及进度,最终保证了教学目标的实现。

建模仿真软件在风力发电机组设计中的应用浅析

主要对风电机组的设计过程进行了分析,并且对风电机组实际设过程中,各个环节建模仿真软件的应用进行了简要分析并对常见的几款风电机组设计中应用的建模仿真软件进行了介绍和应用分析.

半直驱永磁风力发电机散热性能影响因素研究

[目的]随着风力发电技术的发展,永磁风力发电机单机容量不断增加,发热功率也随之增大,发电机散热正面临前所未有的挑战,如何有效地解决发电机温升高、散热难的问题一直是我们研究的重点。[方法]文章基于STAR-CCM+软件平台建立了发电机散热-冷却一体化数值模拟方法,通过与实验值对比验证了数值计算方法的可靠性。在此基础上对大功率永磁风力发电机内部温度分布规律以及冷却系统散热性能影响因素进行了研究。[结果]在额定功率下,绕组、定子铁芯的最高温度出现在中层区域,工艺条件允许的情况下,冷却水管位置应尽可能靠近绕组,以带走更多的热量;增大发电机总进风量,可显著降低定子铁芯温度和绕组温度;进风温度与绕组、定子铁芯最大温度呈线性关系,进风温度每降低5℃,最高温度降低约1.4℃,降低进风温度可一定程度上改善发电机散热性能;进水温度与绕组、定子铁芯最大温度呈线性关系,进水温度每降低5℃,最高温度降低约3.3℃,降低进水温度可大幅提升发电机散热性能。此外,冷却水管与定子铁芯的间隙极大地阻碍了冷却水管的换热,在间隙中填充导热性能好的材料可有效改善发电机散热性能。[结论]文章所得结论可有效指导永磁风力发电机的散热设计,能够保障风电机组在正常工作中安全运行。

Design of Large-Scale Prestressing Bucket Foundation for Offshore Wind Turbines

The key in the force transmission between the tower and the foundation for offshore wind turbines is to transfer the large moment and horizontal loads. The finite element model of a large-scale prestressing bucket founda- tion for offshore wind turbines is set up and the structural characteristics of the arc transition structure of the founda- tion are analyzed for 40-60 channels(20-30 rows) arranged with prestressing steel strand under the same ultimate load and boundary conditions. The mechanical characteristics of the key parts of the foundation structures are illus- trated by the peak of the principal tensile stress, the peak of the principal compressive stress and the distribution areas where the principal tensile stress is larger than 2.00 MPa. It can be concluded that the maximum principal tensile stress of the arc transition decreases with the increasing number of channels, and the amplitude does not change signifi- cantly; the maximum principal compressive stress increases with the increasing number of channels and the amplitude changes significantly; however, for the distribution areas where the principal tensile stress is larger than 2.00 MPa, with different channel numbers, the phenomenon is not obvious. Furthermore, the principal tensile stress at the top of the foundation beams fluctuantly increases with the increasing number of channels and for the top cover of the bucket, the principal tensile stress decreases with the increasing number of channels.

Design Methodology Research of the Floating Foundation for the Offshore MW-Rating Wind Turbine

With the rapid growth of the offshore wind industry, the innovative floating offshore wind turbine is chosen as the most feasible device to harvest the vast wind energy in deep water area. However there is no practical design guide for the floating wind turbine especially the floating foundation. In this paper, based on the investigation on the worldwide floating wind turbine and current available expertise on floating platforms accumulated in offshore O/G （oil and gas） industry, an integrated design methodology is presented according to the specialized characteristics of wind turbine, including the type selection of foundation and mooring system, design standard, design procedure, design conditions, key technologies involved. Finally a semi-submersible floating foundation is designed to support certain megawatt-rating wind turbine of Goldwind and also performance analysis and code checks are performed to validate the design. The design method of the floating foundation provided in this paper is proved feasible and can be adopted in practical engineering design.