空心导线对内冷式风力发电机电磁及冷却特性的影响研究  

Influence Research of Hollow Conductor on Electromagnetic and Cooling Characteristics of Evaporative Internal Cooling Wind Generator

作　　者：程自然 阮琳 高剑[1] 黄守道[1] 杨劼[3] CHENG Ziran;RUAN Lin;GAO Jian;HUANG Shoudao;YANG Jie(College of Electrical and Information Engineering,Hunan University,Changsha 410082,Hunan Province,China;University of Chinese Academy of Sciences,Haidian District,Beijing 100190,China;Institute of Electrical Engineering(IEE)of Chinese Academy of Sciences(CAS),Haidian District,Beijing 100190,China)

机构地区：[1]湖南大学电气与信息工程学院,湖南省长沙市410082 [2]中国科学院大学,北京市海淀区100190 [3]中国科学院电工研究所,北京市海淀区100190

出　　处：《中国电机工程学报》2023年第12期4789-4799,共11页Proceedings of the CSEE

摘　　要：采用蒸发内冷式空心导线冷却是提升电机散热性能的一种经济而又有效的方式,针对风力发电机小倾角自循环系统中内冷式空心导线的结构布置形式,分析空心导线对发电机电磁及冷却性能的影响。首先,基于永磁风力发电机恒端电压控制策略对功率因数的敏感度特性进行分析,基于电磁场解析计算研究了空心导线对槽漏抗和漏磁系数的影响。之后,基于传热理论以及小倾角自循环沸腾实验对空心导线的换热能力以及极限热流密度进行研究,分析空心导线尺寸参数对两者的影响。最后,基于电磁和冷却性能的耦合优化求解得到10MW直驱式风力发电机内冷式空心导线的多目标优化帕累托前沿,使得优化方案在兼顾电磁和冷却性能两方面都具有更好的折衷性和准确性,优化方法和策略能够为内冷式风力发电机的优化设计研究提供参考和理论依据。The method of internal cooling with hollow conductor is an economical and efficient way to improve the cooling performance of wind generators.For the layout of hollow conductor in a self-circulating cooling system with small dip angle,the influence of hollow conductors on the electromagnetic and cooling properties of wind generators are analyzed.First of all,the relationship between the power factor and electromagnetic parameters of the wind generator is analyzed based on the constant voltage control strategy.The influence of hollow conductor parameters on the slot leakage reactance and magnetic leakage coefficient is analyzed based on the electromagnetic field.Then,the heat transfer characteristics and limit heat flux density of hollow conductor are analyzed based on the heat transfer theory and small dip angle self-circulation experiment.Finally,the pareto front of hollow conductor parameters of 10MW direct-drive wind generator is obtained based on the multi-objective optimization,and the schemes have better tradeoff and accuracy in both electromagnetic and cooling performance,which could provide a theory reference for the optimization design of internal cooling wind generators.

关 键 词：蒸发内冷式风力发电机 空心导线 功率因数 极限热流密度 参数敏感性分析 

分 类 号：TK89[动力工程及工程热物理—流体机械及工程]