受限功率跟踪转差频率控制系统研究

摘要

Aiming at the problem that the traditional photovoltaic cells power is low and unstable, and the speed of the flywheel cannot be driven by the asynchronous motor, the study was carried out on the control of the motor by adopting slip frequency control system.At the same time, in the case of the power supply changing, the torque was controlled by frequency tracking.The model can detect the electromagnetic torque, rotational speed, average electromagnetic power, as well as the motor rotor current.The simulated analysis was conducted with the simulation model which was established in the MATLAB/Simulink environment.The results show that the slip frequency control system of three-phase asynchronous motor can decouple the physical quantity of the motor, which greatly improves the performance of the asynchronous motor speed control system.%针对传统光伏电池供电功率小且不稳定,无法常规驱动异步电动机拖动飞轮高速运转的问题,采用转差频率控制对电机的控制进行了研究.同时在电源功率发生变化的情况下,通过功率跟踪来控制转矩.该模型可以检测到电磁转矩、转速、平均电磁功率和电机的转子电流.在MATLAB/Simulink环境下建立了仿真模型并且进行了仿真分析.研究结果表明,三相异步电动机的转差频率控制系统能够实现电机物理量的解耦,使得异步电动机调速系统的性能大大提高.