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Carrier-Based Common Mode Voltage Control Techniques in Three-Level Diode-Clamped Inverter

机译:三电平二极管钳位型逆变器中基于载波的共模电压控制技术

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摘要

Switching converters are used in electric drive applications to produce variable voltage, variable frequency supply which generates harmful large dvldt and high-frequency common mode voltages (CMV). Multilevel inverters generate lower CMV as compared to conventional two-level inverters. This paper presents simple carrier-based technique to control the common mode voltages in multilevel inverters using different structures of sine-triangle comparison method such as phase disposition (PD), phase opposition disposition (POD) by adding common mode voltage offset signal to actual reference voltage signal. This paper also presented the method to optimize the magnitude of this offset signal to reduce CMV and total harmonic distortion in inverter output voltage. The presented techniques give comparable performance as obtained in complex space vector-based control strategy, in terms of number of commutations, magnitude, and rate of change of CMV and harmonic profile of inverter output voltage. Simulation and experimental results presented confirm the effectiveness of the proposed techniques to control the common mode voltages.
机译:开关转换器用于电力驱动应用中,以产生可变电压,可变频率电源,从而产生有害的大dvldt和高频共模电压(CMV)。与传统的两级逆变器相比,多级逆变器产生的CMV更低。本文提出了一种简单的基于载波的技术,通过使用不同结构的正弦三角形比较方法(例如,相位布置(PD),相对置布置(POD))来控制多电平逆变器中的共模电压,方法是将共模电压偏移信号添加到实际参考中电压信号。本文还提出了一种优化此偏移信号幅度的方法,以减少逆变器输出电压中的CMV和总谐波失真。提出的技术在换向次数,CMV的幅度和变化率以及逆变器输出电压的谐波分布方面,提供了与基于复杂空间矢量的控制策略相比可比的性能。给出的仿真和实验结果证实了所提出的控制共模电压的技术的有效性。

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  • 来源
    《Advances in power electronics》 |2012年第1期|327157.1-327157.12|共12页
  • 作者单位

    Electrical Engineering Department, SATI, Vidisha 464001, India;

    Electrical Engineering Department, MANIT, Bhopal 462051, India;

    Electrical Engineering Department, IIT, Uttaranchal, Roorkee 247667, India;

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