摘要
提出一种三相PWM电压型逆变器的积分型滑模控制方案。首先分析并建立了三相逆变器的dq模型,针对dq模型设计控制器,控制器分为内外两个环,外环为伺服补偿控制器,保证系统具有期望的动态特性并补偿负荷扰动;内环为滑模控制器,消除系统参数摄动产生的影响。在内外环共同作用下,系统对参数摄动以及时变的负荷干扰具有良好的动静态性能。仿真结果表明,当系统参数摄动和负荷突变时,系统输出电压能够很好的跟踪参考电压。
An integral sliding mode control strategy for three-phase PWM VSI （Voltage source inverter） is presented in the paper. The inverter model in the dq reference frame is derived and the controller is designed based on the model. It is composed of two loops, the outer loop is a servo compensation controller, by which the fast dynamic characteristic is achieved and the load disturbance is compensated, while the inner one is a sliding mode controller which eliminates the influence caused by the parameter variation. With the cooperation of the two loops both the fast dynamic characteristic and the good steady accuracy are achieved. The simulation results show that the proposed scheme can track the reference voltage very well in the presence of load disturbance and parameter variation.
出处
《电工技术学报》
EI
CSCD
北大核心
2007年第12期105-109,共5页
Transactions of China Electrotechnical Society
基金
国家自然科学基金资助项目(604330501)
关键词
PWM
电压型逆变器
滑模控制
PWM voltage source inverter, sliding mode control
