Enhanced Circular Chain Control for Parallel Operation of Inverters in UPS Systems

被引：9

作者：

Shahparasti, Mahdi ^{[1
]}

Savaghebi, Mehdi ^{[1
]}

Hosseinpour, Majid ^{[2
]}

Rasekh, Navid ^{[2
]}

机构：

[1] Univ Southern Denmark, Dept Mech & Elect Engn, Elect Engn Sect, DK-5230 Odense, Denmark

[2] Univ Mohaghegh Ardabili, Dept Elect & Comp Engn, Ardebil 5619913131, Iran

来源：

SUSTAINABILITY | 2020年 / 12卷 / 19期

关键词：

parallel inverters; current sharing; circular chain control (3C); CAPACITOR VOLTAGE CONTROL; CONTROL STRATEGY; SECONDARY CONTROL; 3-PHASE UPS; PART I; POWER; MICROGRIDS; DESIGN; MASTER;

D O I：

10.3390/su12198062

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

In this paper, a current sharing method based on the circular chain control (3C) method is proposed for controlling parallel inverters of unequal ratings in uninterruptible power supply (UPS) applications. Due to its circular structure, 3C is one of the most convenient methods which can be used in UPS as well as microgrid systems. However, the conventional 3C control strategy is only applicable to inverters of equal power ratings. The proposed method not only retains the circular structure of the 3C method, but also provides adaptability for the parallel operation of inverters with different power ratings. Moreover, this method adds hot-swap capability to the parallel inverter. A two-loop control structure is used to control the inverters. For proper current sharing, currents of inverters are conveyed in a circular structure with appropriate gains through control links. Simulation and experimental results for linear and nonlinear loads verify the effectiveness of the proposed strategy.

引用

页码：1 / 16

页数：16

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