采用死区补偿和输出电流补偿的数控UPS逆变器  

Digitally controlled UPS inverter with dead time and output current compensation

作　　者：刘亚东[1] 邢岩[2] 黄立培[1] 坂根诚 

机构地区：[1]清华大学电机工程与应用电子技术系电力系统及大型发电设备安全控制和仿真国家重点实验室,北京100084 [2]南京航天航空大学自动化学院,南京2100163 [3]杰士汤浅公司,日本国大阪府5691115

出　　处：《清华大学学报（自然科学版）》2006年第1期17-20,共4页Journal of Tsinghua University(Science and Technology)

摘　　要：为在不增加传感器的情况下,改善不间断电源(U PS)逆变器的输出动静态性能,提出了一种数字控制策略。该策略利用面积等效原理,将线性负载下的死区等效为方波扰动,利用前馈对其补偿;将输出电流视为对控制系统的扰动,并利用前馈补偿,通过对输出电压的微分运算获得输出滤波电容电流值,从而在不使用电流传感器的情况下,实现了对U PS逆变器的准双环控制。在1 kVA的样机上进行实验研究,其结果在额定阻性负载下的稳态总谐波畸变率(THD)为2.49%,空载与额定负载间阶越变化下的电压调整率为6.75%。结果表明:死区补偿和输出电流补偿有效,整个控制策略的可行。A digital control scheme was developed to improve the output performance of UPS （uninterruptable power supply） inverters without adding additional sensors. The scheme uses feed forward compensations for the dead time effect for a linear load which is equivalent to a voltage disturbance of the square wave based on the average area method and for the output current regarded as disturbance. The output filter capacitor current comes from the differential to the output voltage to give quasi double loop control without current sensor. The total harmonics distortion （THD） for a 1 KVA prototype at rated resistor load is 2.49% with the voltage regulation for a step change from null load to rated load of 6.75%. The results show that the dead time compensation and output current compensation is quite effective.

关 键 词：不间断电源 数字控制 死区 多环控制 

分 类 号：TN86[电子电信—信息与通信工程]