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浙江大学学报(工学版)
J4  2011, Vol. 45 Issue (9): 1609-1615    DOI: 10.3785/j.issn.1008-973X.2011.09.017
    
Novel SVPWM control strategy of active inverter in double-fed system
LIU Xue-wen, QU Wen-tai, CHENG Yong
College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China
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Abstract  

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．

Published: 01 September 2011
CLC:  TP 271.4  
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Cite this article:

LIU Xue-wen, QU Wen-tai, CHENG Yong. Novel SVPWM control strategy of active inverter in double-fed system. J4, 2011, 45(9): 1609-1615.

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https://www.zjujournals.com/eng/10.3785/j.issn.1008-973X.2011.09.017     OR     https://www.zjujournals.com/eng/Y2011/V45/I9/1609


双馈系统中SVPWM有源逆变新技术

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.

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