谐波电流最小同步优化脉宽调制策略研究

发布时间：2018-07-01 11:06

本文选题：谐波电流抑制 + 谐波电流最小脉宽调制　；参考：《中国电机工程学报》2015年05期

【摘要】：在许多大功率交流传动领域,由于开关损耗较大,功率半导体器件的开关频率不能过高,通常在1 kH z以下,逆变器工作在较低的载频比下,因此对逆变器相电流谐波抑制就变得十分紧迫。为达到相电流谐波最优化的目的,需要依靠一定的数学约束条件对调制波形进行精确控制,因此可编程优化调制策略得到广泛应用。其中将谐波电流最小作为约束条件的优化脉宽调制(pulse width modulation,PWM)是一种非常具有吸引力的解决方案。该文以谐波抑制能力较弱的两电平三相三桥臂电压型逆变器为研究对象,给出使得输出电流谐波最小的优化脉宽调制较为精确的约束条件,并且完成全调制范围、多种波形发生条件下的优化函数多解的比较,并最终给出最优的优化开关角组合。比较该调制技术与其他传统的脉宽调制技术在谐波抑制能力方面的性能,并经过仿真与实验进行验证。
[Abstract]:In many fields of high power AC drive, the switching frequency of power semiconductor devices can not be too high because of the high switching loss. Usually, the switching frequency of power semiconductor devices is less than 1 kHz, and the inverter works at a lower carrier frequency ratio. Therefore, harmonic suppression of inverter phase current becomes very urgent. In order to achieve the optimization of phase current harmonics, it is necessary to control the modulation waveform precisely by certain mathematical constraints, so the programmable optimal modulation strategy is widely used. The optimal pulse width modulation (pulse width) with the minimum harmonic current as a constraint condition is an attractive solution. In this paper, a two-level three-phase three-leg voltage source inverter with weak harmonic suppression capability is studied. The optimal pulse width modulation with minimum output current harmonics is given, and the full modulation range is completed. Finally, the optimal switching angle combination is given. The performance of this modulation technique in harmonic suppression is compared with that of other traditional pulse width modulation techniques and verified by simulation and experiments.
【作者单位】：中国科学院电力电子与电气驱动重点实验室(电工研究所);中国铁道科学院机车车辆研究所;
【基金】：国家自然科学基金项目(51177159)~~
【分类号】：TM464

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