Control scheme of modular multilevel matrix converters for expanding low-frequency operating range

被引：0
|
作者：
Li F. [1 ]
Wang G. [1 ]
Liu R. [1 ]
机构：
[1] Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education(Shandong University), Jinan
来源：
Dianli Xitong Zidonghua/Automation of Electric Power Systems | 2016年 / 40卷 / 22期
基金：
中国国家自然科学基金;
关键词：
Capacitor voltage control; Current reconstruction; Low frequency; Modular multilevel matrix converter (M[!sup]3[!/sup]C);
D O I：
10.7500/AEPS20150518002
中图分类号：
学科分类号：
摘要：
The amplitude of each frequency component of sub-module capacitors ripple voltages is inversely proportional to its frequency in modular multilevel matrix converters (M3C). When the output-input frequency ratio approaches 1/3 under the low-frequency operating conditions, M3C will hardly work properly on account of too high a ripple voltage amplitude of difference frequency between the input frequency and triple output frequency, blocking the continuous suppression of doubling output frequency ripple voltage. This paper presents a control scheme based on the decoupled hierarchical capacitors voltages control and arm current independent control. The doubling output frequency ripple voltage instantaneous power is directly controlled by the outer loop feedback. The continuous operating frequency range is expanded because of the elimination of discontinuous points nearby or the frequency ratio 1/3 by means of current reconstruction. Finally, the OPAL-Rtlab experiments results have verified the control scheme. © 2016 Automation of Electric Power Systems Press.
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页码：132 / 138and153
相关论文
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