αβ0坐标系下带不平衡负载的三相四桥臂变流器控制策略

发布时间：2018-02-26 16:20

本文关键词： αβ坐标系三相四桥臂变流器不平衡负载准比例谐振调节器参考电压前馈有源阻尼　出处：《中国电机工程学报》2014年19期 　论文类型：期刊论文

【摘要】：传统的基于同步旋转坐标系下的三相四桥臂变流器控制复杂,尤其在负载不平衡工况下。为简化四桥臂控制,提出一种αβ0坐标系下的四桥臂变流器控制策略。该控制策略采用准比例谐振调节器控制输出电压,并加入参考电压前馈改善系统控制精度与动态性能,在此基础上采用基于电感电流的有源阻尼控制方法进一步增强系统的稳定性。针对准比例谐振调节器在基波频率处有限增益导致的静差问题,分析调节器参数以及滤波器参数对增益系数选取的影响,给出控制器参数设计以及实际参数调试的依据。最后,对所提控制策略进行实验验证。实验结果表明,在不平衡负载条件下,采用该控制策略的四桥臂变流器能够实现输出电压的平衡控制,动态性能良好。
[Abstract]:The control of three-phase four-leg converter based on synchronous rotating coordinate system is complex, especially under the condition of unbalanced load. A control strategy of four-leg converter in 伪尾 _ 0 coordinate system is proposed, in which quasi proportional resonant regulator is used to control the output voltage, and the reference voltage feedforward is added to improve the control accuracy and dynamic performance of the system. On the basis of this, the active damping control method based on inductance current is used to further enhance the stability of the system. The influence of regulator parameters and filter parameters on the selection of gain coefficients is analyzed. The design of controller parameters and the basis for debugging actual parameters are given. Finally, the proposed control strategy is verified experimentally. The experimental results show that, Under the condition of unbalanced load, the four-arm converter with this control strategy can realize the balanced control of output voltage, and the dynamic performance is good.
【作者单位】：北京交通大学电气工程学院;
【基金】：国家863高技术基金项目(2011AA05A306)~~
【分类号】：TM46

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