级联H桥整流器的新型直流电压与无功平衡控制策略
发布时间：2018-10-12 16:39
【摘要】：为解决级联H桥整流器(cascaded H bridge rectifier,CHBR)的直流侧电压不平衡问题,实现各H桥直流端电压和无功平衡,消除电压平衡控制器与基本双闭环控制器之间的耦合效应,该文提出一种新型的直流侧电压与无功平衡的控制策略。该方法通过对有功和无功占空比按一定关系同时进行修正来实现电压与无功平衡的控制,即使在负载不平衡情况下也能维持直流侧电压和各H桥无功平衡,消除了基本双闭环控制器与电压平衡器之间的耦合效应。同时,分析加入电压平衡控制器的系统稳定性,并讨论电压平衡控制器的有效范围,最后通过仿真和实验验证该方法的有效性和可行性。
[Abstract]:In order to solve the problem of voltage imbalance in the DC side of cascaded H-bridge rectifier (cascaded H bridge rectifier,CHBR), the voltage and reactive power balance of each H-bridge DC terminal is realized, and the coupling effect between the voltage balance controller and the basic double-closed loop controller is eliminated. In this paper, a new control strategy of DC voltage and reactive power balance is proposed. This method realizes the control of voltage and reactive power balance by modifying the active power and reactive power duty cycle simultaneously according to a certain relation. It can maintain the DC side voltage and the reactive power balance of each H bridge even under the condition of load unbalance. The coupling effect between the basic double closed loop controller and the voltage balancer is eliminated. At the same time, the stability of the system with voltage balance controller is analyzed, and the effective range of voltage balance controller is discussed. Finally, the effectiveness and feasibility of this method are verified by simulation and experiment.
【作者单位】： 湘潭大学信息工程学院;
【基金】：国家自然科学基金资助项目(51577162)~~
【分类号】：TM461
本文编号：2266844
[Abstract]:In order to solve the problem of voltage imbalance in the DC side of cascaded H-bridge rectifier (cascaded H bridge rectifier,CHBR), the voltage and reactive power balance of each H-bridge DC terminal is realized, and the coupling effect between the voltage balance controller and the basic double-closed loop controller is eliminated. In this paper, a new control strategy of DC voltage and reactive power balance is proposed. This method realizes the control of voltage and reactive power balance by modifying the active power and reactive power duty cycle simultaneously according to a certain relation. It can maintain the DC side voltage and the reactive power balance of each H bridge even under the condition of load unbalance. The coupling effect between the basic double closed loop controller and the voltage balancer is eliminated. At the same time, the stability of the system with voltage balance controller is analyzed, and the effective range of voltage balance controller is discussed. Finally, the effectiveness and feasibility of this method are verified by simulation and experiment.
【作者单位】： 湘潭大学信息工程学院;
【基金】：国家自然科学基金资助项目(51577162)~~
【分类号】：TM461
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