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中国电机工程学报 2009, 29(15) 36-42 DOI: ISSN: 0258-8013 CN: 11-2107/TM

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电力电子与电力传动

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	本文关键词相关文章
	重复控制
	阶跃响应
	建模
	三相逆变器
	本文作者相关文章
	孙孝峰
	孟令杰
	杨超
	PubMed
	Article by Xun,X.F
	Article by Meng,L.J
	Article by Yang,t

三相逆变器采样模型重复控制研究

孙孝峰，孟令杰，杨超

电力电子节能与传动控制河北省重点实验室(燕山大学电气工程学院)

摘要：重复控制系统中补偿器的补偿精度与整体系统的动静态性能有直接关系，而补偿器的设计又完全依赖于控制对象的数学模型。为了提高补偿器的补偿精度，根据波形库控制技术提出基于控制对象单位阶跃响应波形的建模方法。由于典型响应曲线能够体现开关延时、测量延时、死区时间、非线性磁单元、杂散参数等因素对系统的影响，因此这种模型精度较高。在两相静止坐标系下对三相逆变器突加阶跃调制信号，采集在相同坐标系下的逆变器输出电压阶跃响应波形，基于此波形构建控制对象模型。相比于平均信号模型，应用该模型可以提高补偿器的截止频率和补偿精度，最终使整体系统的稳态性能得到改善。此方案在一台采用TMS320LF2407A型号数字信号处理器控制的三相逆变器上得到了验证。

关键词：重复控制阶跃响应建模三相逆变器

Repetitive Control of Three-phase Inverter Based on Sampling Model

SUN Xiao-feng, MENG Ling-jie, YANG Chao

Key Lab of Power Electronics for Energy Conservation and Motor Drive of Hebei Province (College of Electrical Engineering,Yanshan University)

Abstract: The precision of compensator which is an important part of the repetitive control system has direct influence on the system performance. The design of compensator totally depends on the mathematical model of the control target. This paper proposed a modeling method using inverter step response waveform data to improve the precision of compensator based on waveform library control technique. As influences of the inverter switch delaying time, measurement delaying time, dead-time, non-linear magnetism unit, spurious parameters, etc., can be shown in its typical response waveform, the model based on sampling data has high precision. For the three phase inverter, by sampling the step response of inverter’s output voltage, the control target’s model was built in two phase static frame. With this kind of model, the compensator’ cut-off frequency and the precision of compensator could be raised compared to the average model, so the performance of repetitive control system was improved. This scheme was proved on a three-phase inverter controlled by TMS320LF2407A digital signal processor.

Keywords: repetitive control step response modeling three-phase inverter

收稿日期 2008-06-06 修回日期 2008-09-03 网络版发布日期 2009-05-27

DOI:

基金项目:

国家自然科学基金项目(50407012, 50837003)。

通讯作者: 孙孝峰

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