A novel control strategy for load converter of DC isolated distribution system under unbalanced loading conditions

被引：1

作者：

Noroozian, R. ^{[1
]}

Abedi, M. ^{[1
]}

Gharehpetian, G. B. ^{[1
]}

Hosseini, S. H. ^{[2
]}

机构：

[1] Amir Kabir Univ Technol, Dept Elect Engn, Tehran, Iran

[2] Tabriz Univ, Dept Elect & Comp Engn, Tabriz, Iran

来源：

JOURNAL OF ZHEJIANG UNIVERSITY-SCIENCE A | 2009年 / 10卷 / 06期

关键词：

Unbalanced load; Power quality; Symmetrical components; Control strategy; INVERTER;

D O I：

10.1631/jzus.A0820294

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A novel control strategy for the load converter supplying the unbalanced AC load in a DC isolated distribution system is presented. The control algorithm results in balanced and sinusoidal load voltages under unbalanced AC loading. The unbalanced load is characterized in the d-q-0 rotating coordinate based on symmetrical sequence components. Also, the mathematical model of the load converter in both a-b-c and d-q-0 coordinates is derived by using the average large signal model. Then, two control strategies for the load converter are presented. The first one uses the conventional d-q-0 controller to ensure the voltage and current regulation. The second one is a newly proposed control strategy based on the decomposition of the voltage and current into instantaneous positive, negative, and zero sequences. These three sequences are controlled independently in their own reference frames as DC signals. The performance of the load converter using these two control strategies is compared. Simulation results show the validity and capability of the newly proposed control strategy.

引用

页码：890 / 899

页数：10

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