中文摘要：

忽略定子阻抗温漂等因素的影响,常规的同步电机是一个三相参数对称的系统,且不考虑变频器与电机之间的接线阻抗。在一种新型石油钻井平台中：钻井电机位于深井下,变频器与电机之间有较长的传输线,由于工程条件限制造成了三相传输线阻抗不平衡。由于线路阻抗的不平衡,会使得电机电流也不平衡,即在电机电流中会出现负序分量。电机电流的负序分量将影响电机控制性能。该文提出了一种基于比例积分谐振控制器（PIR）的电流控制策略,有效的实现了不平衡阻抗条件下的永磁同步电机矢量控制。最后,通过搭建Matlab/Simulink仿真及实验样机,验证了所提控制策略的正确性和可靠性。

英文摘要：

Ignoring the stator resistance temperature drift and other factors, the conventional synchronous motor system is a symmetrical three-phase system which doesn＇t consider the line impedance between the inverter and the motor. In a new oil drilling platform, motor is located several kilometers below the ground. There is a long motor cable between the inverter and motor. As the project conditions, the three-phase transmission line impedance is unbalanced. Because of the unbalance of the line impedance, it also makes the motor current unbalance, which also means that the motor current contains negative sequence component. Negative sequence component of the motor current seriously affects motor control performance. A current vector control strategies based on proportional integral quasi resonant （PIR） controller was proposed in this paper, which can effectively accomplish motor vector control under the impedance unbalance conditions. Finally, the constructed Matlab/Simulink simulation and experimental prototype verified the availability of the proposed control strategy.