Predictive Optimal Control of PWM Rectifiers With Power Compensation in Unbalanced Grids

被引：0
|
作者：
Ma W. [1 ]
Guo Q. [1 ]
Li S. [1 ]
机构：
[1] Chongqing Energy Internet Engineering Technology Research Center, Chongqing University of Technology, Chongqing
来源：
Gaodianya Jishu/High Voltage Engineering | 2023年 / 49卷 / 10期
关键词：
gird voltage imbalanced; multi-vector synthesis; power compensation; predictive power control; switching sequence optimization;
D O I：
10.13336/j.1003-6520.hve.20221317
中图分类号：
学科分类号：
摘要：
PWM rectifiers are widely used in grid-connected power conversion systems, however, grid voltage imbalances can impair the power quality and the performance of the converter. To this end, The model predictive power control (MPPC) strategies with power compensation are proposed for PWM rectifiers to improve the power quality in case of imbalanced grid voltage . In the strategies, the power compensation value is calculated by using the grid voltage, current and their 90° lag signals in the αβ stationary coordinate system;meanwhile, the complex component extraction can be avoided. In addition, an optimized switching sequence MPPC (OSS-MPPC) strategy is proposed in this paper to address the problem of high fluctuation in controlled volumes of finite control set MPPC (FCS-MPPC), which is caused by irregular switching frequency. The method is based on multi-vector synthesis and through optimization of the switching sequence to achieve fixed switching frequency control, which significantly improves net-side current while eliminating active power pulsations. When the grid is unbalanced, comparison by simulation and laboratory results with conventional FCS-MPPC verify that the OSS-MPPC strategy with power compensation in this paper can ensure the continuous and reliable operation of PWM rectifiers. © 2023 Science Press. All rights reserved.
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页码：4287 / 4296
页数：9
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