双三电平中点钳位开绕组电机反电动势谐波电压下弱磁控制策略  

Open-End Winding Motor Field-Weaken Control Strategy of Dual 3L-Neutral Point Clamped Based on Back-Electromotive Force Harmonic Voltage

作　　者：尹靖元[1] 周冰[2] Yin Jingyuan;Zhou Bing(The Institute of Electrical Engineering Chinese Academy of Sciences Beijing 100190 China;State Grid Beijing Electric Power Company Beijing 102699 China)

机构地区：[1]中国科学院电工研究所,北京100190 [2]国网北京市电力公司,北京102699

出　　处：《电工技术学报》2017年第10期174-181,共8页Transactions of China Electrotechnical Society

摘　　要：主要针对双三电平中点钳位开绕组电机在反电动势谐波电压存在下机侧变流器弱磁控制策略展开研究。首先建立开绕组永磁同步电机的数学模型,通过PR调节器实现对电机反电动势谐波幅值和相位观测,使变流器调制波叠加同样幅值相位的零序分量进行零序电流抑制。进行反电动势谐波电压下的变流器弱磁控制分析,并对比不同调制策略对弱磁控制范围影响,得出在确定反电动势电压幅值和相位下,拓宽变流器弱磁控制区域的调制策略,有利于电机工作在更高转速。The motor converter control strategy of dual3L-NPC open-end winding motor is proposed with back-electromotive force harmonic voltage.Firstly,the mathematic model of open-end wind PMSG is established.The value and phase of back-electromotive force harmonic is observed by PR regulator,and the zero sequence current is suppressed by adding the same value and phase zero voltage to the modulation waves.The field-weaken control with the back-electromotive force harmonic voltage is analyzed,and comparisons of the field-weaken range under different modulation strategies are presented.With the certain EMF value and phase,the modulation strategy for boarding the field-weaken range is acquired,so that the motor can work at a higher speed.

关 键 词：开绕组电机 反电动势谐波 零序电流 弱磁控制 

分 类 号：TM351[电气工程—电机]