大型可变速抽水蓄能发电电动机软起动到软并网研究  

Study on Soft Starting and Synchronization for Large Speed-variable Pumped Storage Motor-generator

作　　者：路振刚 胡金明 孙玉田[2] 陶大军[3] LU Zhengang;HU Jinming;SUN Yutian;TAO Dajun(State Grid Xinyuan Company Ltd.,Beijing 100761,China;Harbin Institute of Large Electrical Machinery,Harbin 150040,China;National Engineering Research Center of Large Electric Machines and Heat Transfer Technology(Harbin University of Science and Technology),Harbin 150080,China)

机构地区：[1]国网新源控股有限公司,北京100761 [2]哈尔滨大电机研究所,哈尔滨150040 [3]大型电机与传热技术国家地方联合工程研究中心(哈尔滨理工大学),哈尔滨150080

出　　处：《大电机技术》2020年第6期33-39,共7页Large Electric Machine and Hydraulic Turbine

摘　　要：本文从可变速抽水蓄能发电电动机的基于定子磁场定向矢量控制方法出发,推导出交流励磁电机在两相同步旋转坐标系下的数学模型,提出交流励磁电机做电动工况运行和发电工况运行时不同的起动和并网策略,并基于此控制策略对交流励磁电机电动和发电工况的软起动到软并网进行了仿真研究。文中以一台300MW交流励磁电机为研究对象,搭建交流励磁电机、小扰动简化水泵水轮机以及控制器暂态仿真模型,仿真过程中,转速变化平稳,定、转子电流波动较小,暂态仿真的结果验证了软起动和软并网控制策略的合理性,为基于交流励磁的抽水蓄能发电电动机从安全起动到并网运行提供了必要的理论参考依据。According to the stator field-oriented vector control principle of speed-variable pumped storage motor-generators(SVPSMG),the mathematical model in two-phase synchronous rotating coordinate system is deduced,different starting and grid-connection strategies are proposed for the ac excitation motor operating under electric condition and power generation condition.In this paper,a 300MW AC excitation motor is taken as the research object,and the transient simulation models of AC excitation motor,small disturbance simplified pump turbine and controller are built.During the simulation process,the speed changes smoothly,and the stator and rotor current fluctuate slightly.The results of transient simulation verify the rationality of soft start and soft grid connection control strategy.It provides the necessary theoretical basis for the safe starting and grid connection of the pumped storage generator based on AC excitation.

关 键 词：交流励磁电机 磁场定向 S函数 软起动 软并网 

分 类 号：TM34[电气工程—电机]