变速永磁同步水轮发电机年发电量最优设计  

Design optimization for the annual energy yield of variable-speed permanent magnet synchronous hydro generators

作　　者：戴理韬 高剑[1] 李承栩 张文娟 黄守道[1] DAI Li-tao;GAO Jian;LI Cheng-xu;ZHANG Wen-juan;HUANG Shou-dao(College of Electrical and Information Engineering,Hunan University,Changsha 410082,China;College of Electronic Information and Electrical Engineering,Changsha University,Changsha 410022,China)

机构地区：[1]湖南大学电气与信息工程学院,长沙410082 [2]长沙学院电子信息与电气工程学院,长沙410022

出　　处：《电机与控制学报》2021年第4期23-31,共9页Electric Machines and Control

基　　金：国防基础科研计划(JCKY2019110D012);国家重点研发计划项目(2018YFB0606000)。

摘　　要：变速恒频水力发电技术有利于改善传统恒速发电存在的综合效率低、运行条件恶劣、枯水期水资源浪费的不理想情况,对节能与机组健康运行意义重大。文中针对全功率变流器变速发电系统永磁同步电机进行优化设计,不同于经典设计方法仅优化电机额定工况运行效率。首先预分析了拟设计电机的运行工况,并建立了多个水文季节下永磁电机的效率模型。其次,求解多效率目标函数的最优解以提高发电机年发电量,进一步利用田口法结合有限元分析局部优化了永磁电机电磁性能,基于以上分步优化方法得到了电机整体结构参数。最后,130 kW全功率变流机组的实测数据验证了变速恒频发电系统的可靠性与高效性。The variable-speed constant-frequency(VSCF)hydropower technology is beneficial to improve the undesirable situation of low overall efficiency,harsh operating conditions,and wasted water resources during the dry period of traditional constant speed power generation,which is significant for energy saving and healthy operation of the units.In the paper,the optimized design of permanent magnet synchronous generator for full-size converter variable speed generation system is carried out,which is different from the classical design method of optimizing only the rated efficiency.Firstly,the operating conditions of the generator were pre-analyzed,and the efficiency model of the permanent magnet generator under multiple hydrological seasons was established.Secondly,the optimal solution of the multi-efficiency objective function was solved to improve the annual energy production of the generator.The electromagnetic performance of the permanent magnet generator was further optimized locally using Taguchi’s method combined with finite element analysis,and the overall structural parameters of the generator were obtained based on the above stepwise optimization method.Finally,the reliability and high efficiency of the VSCF system are verified by the measured data of a 130 kW full-size converter unit.

关 键 词：水力发电 变速恒频技术 永磁电机 优化设计 年发电量最优 遗传算法 田口法 

分 类 号：TM313[电气工程—电机]