CHN Energy Shendong Coal Group Equipment Management Center

为了进一步改善矿用电机作为动力源时的可靠性和控制性能,研究了使用永磁同步电机来代替传统矿用泵中的异步电机,为了保证电机在矿井中安全长效运行,提出了一种新型不连续脉冲宽度调制技术,该技术可降低开关器件损耗,同时保证其控制性能。在电机的控制策略中,使用改进模型预测电流控制,并在价值函数中引入转速预测误差,优化了预测控制的性能,使用DPWM3算法降低了开关次数;考虑到提高转矩控制特性,引入了扩张状态观测器观测负载转矩,进一步提高了系统转矩控制特性。最后,通过仿真和实验证明了所提出方法,相比较传统的预测控制方法,在速度响应、开关次数、转矩控制、电流谐波方面有了改善。

In order to further improve the reliability and control performance of the motor as the power source in the mine pump, permanent magnet synchronous motor is used to replace the asynchronous motor in the traditional mine pump. In order to ensure the safe and long-term operation of the motor in the mine, a new type of discontinuous pulse width modulation technology is proposed to reduce the loss of switching devices and ensure its control performance. In the control strategy of the motor, the model predictive current control is used, and the speed prediction error is introduced into the value function to optimize the performance of the predictive control. In order to improve the torque control characteristics, the extended state observer is introduced to observe the load torque, further improving the torque control characteristics of the system. Finally, simulation and experiments show that the proposed method is better than the traditional predictive control method in speed response, torque control and current harmonics.

李 华, 杨 荣. 矿用永磁同步电机改进模型预测电流控制研究 [J]. 煤炭工程, 2023, 55(10): 125-130.