UPS逆变器数字控制研究  

Research on Digital Control for UPS Inverter

作　　者：黄立培[1] 刘亚东[1,2] 

机构地区：[1]清华大学电机系电力系统国家重点实验室 [2]飞利浦亚洲研究院

出　　处：《电力电子》2008年第6期7-12,共6页Power Electronics

摘　　要：UPS逆变器的数字控制是实现全数字控制UPS的关键。本文对数字PID控制进行研究。针对数字PID控制方法输出性能不够理想的问题,提出了准双环控制,并采用了死区补偿和输出电流补偿。实验结果表明死区补偿和输出电流补偿的有效性以及整个控制策略的可行性。对无差拍控制方法进行研究,针对无差拍控制对系统参数变化的鲁棒性问题,提出了一种新的控制方案——渐近收敛无差拍控制。该方案与传统无差拍控制的区别是,不是将正弦信号作为参考电压,而是采用当前的输出电压和正弦信号的加权平均作为下一控制周期的目标量。理论分析和实验结果表明,渐近收敛无差拍控制有良好的稳态性能和快速的动态响应,对系统参数的变化有较好的鲁棒性。Digital control for UPS inverter is a key point in full digital controlled UPS. Digital PID control is studied. Quasi double loop control is proposed, together with dead time compensation and output current compensation to improve the output performance of the system. The results show that the dead time compensation and output current compensation are effective and the control scheme is feasible. Deadbeat control method is studied. A novel deadbeat control method- the progressively converging deadbeat control- is proposed in this paper to deal with the problem of poor robustness. Theoretical analysis and experimental results show that the proressively converging deadbeat control has small static error and fhst dynamic response. Further analysis proves that the robustness for parameter variation is better than the traditional deadbeat control.

关 键 词：UPS逆变器 数字控制 无差拍控制 鲁棒性 

分 类 号：TM464[电气工程—电器] TN86[电子电信—信息与通信工程]