摘要
针对无刷双馈电机非线性PID控制方案中转速和负载转矩动态响应性能差,负载突变时易引起振荡等问题,提出无源性控制策略。根据无刷双馈电机同步速旋转坐标系下的电压、磁链和转矩方程,建立电机的欧拉-拉格朗日模型;从能量角度分析电机电气子系统与机械子系统的无源性,设计电机的转矩控制器和转速控制器。为改善系统动态响应,降低其对参数变化的灵敏度,通过在控制器中加入非线性阻尼,实现系统的快速收敛。基于MATLAB/Simulink环境搭建了无刷双馈电机无源性控制的仿真模型,仿真结果表明,无源性控制策略可快速跟踪给定转速,动态响应性能好,全局稳定、鲁棒性好。
A novel passive control strategy was proposed to improve the dynamic response performance of the speed and load torque of the brushless doubly-fed machine （BDFM） with the nonlinear PID control scheme, and the oscillation as the load changes suddenly. The Euler-Lagrangian model of BDFM was established based on the equations of the voltage, flux and torque of BDFM in synchronous speed rotary coordinate system. The passivity of the electrical subsystems and mechanical subsystems of the machine were analysized by the view of energy, and the controllers of the torque and speed were designed. In order to improve the system dynamic response and reduce its sensitivity to parameter variations, the nonlinear damping was added into the controller to make the system achieve fast convergenee. A novel simulation model of BDFM with passivity control strategy was built in MATLAB/Simulink environment. The simulation results showed that a given speed of BDFM could be fastly tracked, BDFM had good dynamic performance, global stability and good robustness with the passive control strategy.
出处
《电机与控制应用》
北大核心
2015年第8期28-34,共7页
Electric machines & control application
基金
国家自然科学基金资助项目(51307025
5177050
51407035)
广东省高等学校科技创新项目(2013KJCX0059)
广东高校优秀青年创新人才培养计划项目资助(2012LYM_0052
2013LYM_0019)
关键词
无刷双馈电机
无源性控制
非线性阻尼
动态响应
鲁棒性
brushless doubly-fed machine
passivity based control
nonlinear damping
dynamic response
robustness
