基于自适应反推控制的无传感器PMSG闭环I/f控制

Adaptive Backstepping Control Based Closed-loop I/f Control of Sensorless Permanent Magnet Synchronous Generator

针对机械弹性储能系统动力源扭矩变化特性,提出一种无传感器永磁同步发电机(PMSG)闭环I/f反推自适应控制策略。建立机械弹性储能系统的数学模型和定子电流矢量定向下的PMSG数学模型,在分析PMSG开环I/f控制不足的基础上,提出基于自适应反推控制的I/f闭环控制方法,通过转速和电流闭环使定子电流定向的dq轴和以电机转子定向的dq轴之间的转角恒定。仿真结果表明,能够抑制转速波动,I/f控制的"转角-自平衡"特性使系统无须加装速度传感器,能够防止启动阶段过流,构建的定子电阻和电感自适应律可以准确辨识PMSG定子电阻和电感,提高了控制的鲁棒性。

A novel strategy applied closed-loop adaptive back-stepping control to permanent magnet synchronous generator(PMSG) is proposed targeting the problem of the modification of torque for mechanical elastic energy storage(MEES) system utilizing PSMG as power source. This paper establishes the mathematical model of MEES system and PMSG, and presents the closed-loop adaptive backstepping control which makes the angle between the dq axis oriented by the current of stator and the dq axis oriented by the rotor a constant value via the speed and current closed-loop based on the analysis of open-loop I/f control. The closed-loop adaptive back-stepping control can suppress the speed fluctuation, sensorless, overcurrent and improve the PMSG robustness by identifying the stator resistance and inductance of generator. The ideal control result can be proved in the state of startup and steady operation of PMSG.