微型燃机电力变换SVPWM过调制策略的实现  

SVPWM Overmodulation Scheme in Microturbine Converter

作　　者：闫士杰[1] 于革[2] 

机构地区：[1]东北大学信息科学与工程学院,辽宁沈阳110004 [2]营口职业技术学院实验中心,辽宁营口115000

出　　处：《控制工程》2006年第5期502-505,共4页Control Engineering of China

基　　金：国家863重大科技专项基金资助项目(2002AA503020)

摘　　要：微型燃机的启动,是靠一定容量的电池进行供电,所以微型燃机应以最快的速度启动完毕。这就要求其电力变换系统必须充分提高直流母线电压的利用率。为了满足上述要求,在空间电压矢量脉宽调制(SVPWM)线性调制的基础上,提出了一种过调制控制策略。该控制策略将整个控制区域按照调制系数的大小分成三种工作模式,线性调制模式、过调制模式Ⅰ和过调制模式Ⅱ。实验结果表明,SVPWM过调制控制策略的直流侧电压利用率比常规SVPWM提高了10%,系统的加速时间缩短了25%。Microturbine generator （MTG） is started by means of battery supply of limited capability. Its start-up process should be completed as soon as fast, so it is required that DC-link voltage utilization rate of MGT converter can be improved. A overmodulation control scheme is prescnted based on linear modulation of space voltage vector pulse width modulation （SVPWM）. According to modulation index value, the scheme have three modes in whole district： linear modulation mode, overmodulation mode Ⅰand overmodulation mode Ⅱ . The experiment results show that the DC-link voltage utilization rate of SVPWM overmodulation scheme is improved by 10% and system acceleration time is decreased by 2.5 %, comparing to the conventional SVPWM.

关 键 词：微型燃机 SVPWM 空间电压矢量 过调制 调制系数 

分 类 号：TP271[自动化与计算机技术—检测技术与自动化装置]