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  • 您现在的位置:首页> 外文期刊>IEEE Transactions on Industrial Electronics >亿博帐号注册详情

    【6h】 Coupling Analysis on Current Control at Low Switching Frequency for the Three-Phase PWM Converter Based on RGA and a Novel Output Feedback Decoupling Method

    机译基于RGA和新型输出反馈解耦方法的三相PWM变换器低开关频率电流控制耦合分析。

    【摘要】With the increase of the rated power, the sampling and switching frequencies of the high-power pulse-width-modulated (PWM) converter tend to be lower so that a challenging scenario is arising in current control system design. This strongly affects the stability and control performance of the current control system due to the undesirable dynamic coupling of the dq current components. From this perspective, this paper presents a systematic procedure for accurately evaluating the coupling of current control systems, which is based on static and dynamic relative gain array (static relative gain array and dynamic relative gain array). Unfortunately, the dynamic coupling of these systems is so serious at low-frequency band, and the parameter variation makes it easier for these systems to lose stability, when a classical proportional integral regulator with feed-forward decoupling or nondecoupling is employed. Hence, a novel output feedback decoupling control method is proposed, which is based on linear control for multiple-input-multiple-output system. Considering the amplification of the first-order differential, the decoupling unit is further improved by replacing the differential with high-pass filter. Experimental results in a small-power converter are presented to support the theoretical analysis and demonstrate the feasibility of the proposed method.

    【摘要机译】随着额定功率的增加,高功率脉宽调制(PWM)转换器的采样和开关频率趋于降低,从而在电流控制系统设计中出现了具有挑战性的情况。由于dq电流分量的不期望的动态耦合,这极大地影响电流控制系统的稳定性和控制性能。从这个角度出发,本文提出了一种基于静态和动态相对增益阵列(静态相对增益阵列和动态相对增益阵列)的,准确评估电流控制系统耦合的系统程序。不幸的是,当使用带有前馈去耦或非去耦的经典比例积分调节器时,这些系统的动态耦合在低频频段是如此严重,并且参数变化使这些系统更容易失去稳定性。因此,提出了一种基于线性控制的多输入多输出系统的输出反馈解耦控制方法。考虑到一阶差分的放大,通过用高通滤波器代替差分来进一步改善去耦单元。提出了小功率变换器的实验结果,以支持理论分析并证明了该方法的可行性。

    【原文格式】PDF

    机译 耦合;开关频率;电流控制;调节器;脉冲宽度调制转换器; MIMO;传递函数;
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