双馈系统中SVPWM有源逆变新技术  

Novel SVPWM control strategy of active inverter in double-fed system

作　　者：刘学文[1] 屈稳太[1] 陈勇[1] 

机构地区：[1]浙江大学电气工程学院,浙江杭州310027

出　　处：《浙江大学学报（工学版）》2011年第9期1609-1615,共7页Journal of Zhejiang University：Engineering Science

基　　金：浙江省科技计划资助项目(2008C21104);浙江省自然科学基金资助项目(Y1100290)

摘　　要：为了改善双馈系统中能量回馈电网的质量,提出一种新的带有同步信号的空间矢量PWM控制算法.该算法将一个时间周期划分为固定的时间片,离线计算出每个时间片内每个电压矢量的作用时间,而该作用时间仅需查表即可获得,算法计算简单,易于实现.通过有源逆变把双馈电机转子中的能量回馈给电网,实现了逆变侧的电压频率相位与电网电压频率相位的完全同步,以及回馈能量的正弦化,大大提高了回馈电能的质量.通过在双馈系统中的实验,证实了该控制策略的可行性.A new space vector pulse width modulation（SVPWM） control strategy with synchronous signal was introduced to improve the quality of doubly-fed motor feedback energy to grid.The inverter working period is divided into some fixed time slots,each time slice of each voltage vector is off-calculated in each time slot,so it can be obtained by looking up a table when the inverter is working online.The strategy is simple and can be realized easily.By the strategy,the sinusoid of the double-fed motor feedback energy is achieved,and the synchronization between the inverter output voltage and the grid voltage is reached.Therefore,the quality of the double-fed motor feedback energy to grid is improved significantly.The results of the double-fed motor experimental system show the feasibility of the SVPWM control strategy.

关 键 词：同步信号 空间矢量PWM 逆变器 双馈系统 

分 类 号：TP271.4[自动化与计算机技术—检测技术与自动化装置]