摘要
分析了Boost变换器带恒功率负载的特性,推导出系统传递函数并得到系统稳定运行条件。采用状态反馈精确线性化技术对系统进行控制。根据Boost变换器带恒功率负载的特点,将最优跟踪技术应用于精确线性化控制中,得到系统非线性控制律。用SABER软件对得到的控制律进行了仿真。仿真结果表明:精确反馈线性化结合最优跟踪可以对Boost变换器带恒功率负载系统进行有效的控制,使系统具有理想的稳态特性和动态响应,在电源及负载大范围变化时,保证系统的稳定运行,满足不同类型负载的要求,具有大信号稳定特性。
The characteristics of boost converter with constant power loads are analyzed. Transfer function of the system is derived and the condition of stability is obtained. State variables feedback exact linearization is used to control the system. According to system characteristics of the system, optimal tracking control is applied to exact linearization and nonlinear control law is obtained. The SABER is used to simulate control law. Simulation results show that state variables feedback exact linearization and optimal tracking technique can be used to control boost converter supplying constant power loads, and make the system with good steady state characteristic and dynamic response. When large disturbances occur in power supply and loads, the nonlinear controller can make system operation steadily, meet with different kinds of loads, and have large-signal stability characteristic.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2007年第13期70-75,共6页
Proceedings of the CSEE
