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.
作者
路振刚
胡金明
孙玉田
陶大军
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)
出处
《大电机技术》
2020年第6期33-39,共7页
Large Electric Machine and Hydraulic Turbine
关键词
交流励磁电机
磁场定向
S函数
软起动
软并网
AC excitation motor
the magnetic field orientation
S-function
soft start
soft synchronization
作者简介
路振刚(1964-),1991年4月毕业于大连理工大学水力发电工程专业,博士研究生,现从事水电站和抽水蓄能电站生产、建设与科研工作,教授级高级工程师。
