摘要
提出了两种ＰＷＭ逆变器的改进无差拍控制算法．这两种算法根据ＰＷＭ逆变器的状态方程，分别采用直接补偿扰动和最优预见控制技术，利用未来信息决定当前的控制输入．使用ＭＡＴＬＡＢ软件对这两种算法进行了仿真．结果表明，当存在随机扰动及电路参数变化时，所提出的两种算法的控制效果均比不考虑补偿扰动的无差拍算法有较大改善．因此，该两种控制算法能够有效地抑制电路参数变化引起的或来自外部的扰动，使输出电压能很好地跟踪参考电压，控制响应快，鲁棒性好．
Two modified deadbeat control algorithms for voltage source uninterrupted power supply(UPS) PWM inverters are proposed in order to minimize the distortion of output voltage when circuit parameters change, external disturbance occurs or load is nonlinear.One of the algorithms compensates disturbance directly and the other uses future information to calculate control input, making use of the optimal preview control technique. The algorithms are simulated using MATLAB. The simulation results show that the control effects of the two algorithms are much better than that of the deadbeat control algorithm without compensating disturbance.It can effectively suppress the disturbances caused by the changes of parameters and external elements. The output voltage can follow the reference signal satisfactorily. The transient response is fast and the robustness is good.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
1998年第6期119-123,共5页
Journal of Shanghai Jiaotong University
关键词
PWM逆变器
无差拍控制
补偿扰动
逆变器
PWM inverters
deadbeat control
disturbance compensation
optimal preview control
