基于多场耦合的风电机组熵产极小化分析  

Entropy Generation Minimization Analysis of Wind Turbines Based on Multi Field Coupling

作　　者：温彩凤[1,2,3] 张建勋[1] 彭海伦[1] 汪建文[1,2] Wen Caifeng;Zhang Jianxun;Peng Hailun;Wang Jianwen(College of Energy and Power Engineering Inner Mongolia University of Technology Hohhot 010051 China;Key Laboratory of Wind Energy and Solar Energy Technology Ministry of Education Inner Mongolia University of Technology Hohhot 010051 China;Xinjiang Technical Institute of Physics&Chemistry CAS Urumchi 830011 China)

机构地区：[1]内蒙古工业大学能源与动力工程学院,呼和浩特010051 [2]风能太阳能利用技术省部共建教育部重点实验室(内蒙古工业大学),呼和浩特010051 [3]中国科学院新疆理化技术研究所,乌鲁木齐830011

出　　处：《电工技术学报》2018年第19期4563-4572,共10页Transactions of China Electrotechnical Society

基　　金：内蒙古自治区自然科学基金资助项目(2015BS0502)

摘　　要：针对永磁风电系统产能效率低、输出稳定度不高等问题,综合考虑损耗热功及换热性能,视风电机组为孤立系统,并基于熵增原理建立熵产模型,结合有限体积元分析结果并运用场协同理论,进行热功产生及扩散过程中熵产率动态分析,进而探究损耗与传热特性、流-热-磁三场耦合机理及熵产率分布规律。最终以极小熵产率为目标,通过调节来流风速、机组偏航角、齿槽结构及定、转子间气隙长度等关键影响因素,确定机组最佳运行工况及磁-热结构,提出风电机组极小熵产率优化方案。The problem of low productivity and low output stability of permanent magnet wind power system was aimed at in this research.The loss of heat and heat transfer performance was considered,and the wind turbine was regarded as an isolated system.Entropy entropy production model was established.The dynamic process of thermal power generation and diffusion entropy generation was analyzed.The loss,the heat transfer characteristics,the three field coupling mechanism and the entropy production rate distribution law were studied.Finally,the minimum entropy production rate was taking as the target.The optimal operating conditions and the magnetic thermal structure of the unit were determined by adjusting the key factors,such as the incoming wind speed,the yaw angle of the unit,gap structure and air gap length between stator and rotor and so on.The minimum entropy production rate optimization scheme of the wind turbine was proposed.

关 键 词：多场耦合 有限体积元 熵增原理 极小熵产率 最佳工况 

分 类 号：TM315[电气工程—电机]