无刷双馈风机系统惯性动力学特性分析及与电网低频耦合模型稳定性研究

项目名称： 无刷双馈风机系统惯性动力学特性分析及与电网低频耦合模型稳定性研究

项目编号： No.51467018

项目类型： 地区科学基金项目

立项/批准年度： 2015

项目学科： 电工技术

项目作者： 鲁敏

作者单位： 石河子大学

项目金额： 48万元

中文摘要： 风能是一种优质的清洁可再生能源，目前风能利用最成熟的方式是风力发电。新疆风能资源丰富，质量好，适合大规模开发利用。 本项目以新疆大风电产业发展为背景，考虑风能资源丰富地区的环境较恶劣，研究以无刷双馈电机作为风力发电机构成电力系统，提高电机运行可靠性，降低系统维护成本。由于无刷双馈电机采用双定子结构，机械和电气特性与有刷双馈电机有所区别，因此，研究首先根据无刷双馈电机的机械和电气特性，分析单机和多机系统的电机惯性动力学特性，结合电机运行时有功出力，计算风机系统等值惯量，依据计算的等值惯量，分析与电网阻尼特性之间的关系，进而研究风机系统与电网低频耦合模型的稳定性，包括小扰动稳定，频率以及功角稳定等。 此项研究结合新疆优势资源，力图从电机机械、电气特性和电网耦合稳定性分析两个层面，探索风电大规模并网时系统稳定性的分析模型问题，具有较强的区域推广前景。

中文关键词： 无刷双馈电机；系统惯性；动力学特性；低频耦合；模型稳定性

英文摘要： Wind energy is a kind of high quality clean renewable energy, the wind power is the most mature way.The wind energy resources of Xinjiang are rich, good quality, and very suitable for large-scale development . This project on the background of xinjiang wind power industry development , considering the abundant wind resources environment of the area is relatively poor, the research adopt the brushless doubly-fed motor(BDFM) as wind generator power system, improve the motor running reliability, reduce the system maintenance cost. Because of double stator structure of BDFM, mechanical and electrical properties are different with doubly-fed motor, the first research is analysis of single and multiple machine motor inertia dynamics characteristic of system according to the mechanical and electrical properties of BDFM, then combining with active ower during the motor running, calculate the wind turbines system equivalent inertia, finally according to the calculation of the equivalent inertia, analysis the relationship of low-frequency coupling model damping characteristics with the wind turbines system , including the small disturbance stability, stable frequency and Angle, etc. Combined with superior resources in xinjiang, the project tries to study the electrical machinery, electrical properties and stability of grid coupling analysis of two aspects, explore large-scale grid wind power system stability analysis model of the problem, it have stronger regional promotion prospects.

英文关键词： Brushless doubly-fed motor;system inertial;dynamic characteristics;low-frequency coupling;the stability of model