Capacitor Voltage Balancing in a Three-Level-Converter-Based Energy Storage System

被引：6
作者：
Burusteta, Sendoa [1 ]
Pou, Josep [2 ,3 ]
Ceballos, Salvador [1 ]
Marino, Iker [1 ]
Angel Alzola, Jose [4 ]
Agelidis, Vassilios G. [2 ]
机构：
[1] Tecnalia Res & Innovat, Derio, Basque Country, Spain
[2] Univ New S Wales, AERI, Sydney, NSW, Australia
[3] Tech Univ Catalonia, Terrassa, Catalonia, Spain
[4] Tecnalia Res & Innovat, Field Energy Storage, Derio, Basque Country, Spain
来源：
EPE JOURNAL | 2013年 / 23卷 / 04期
关键词：
Energy storage; Renewable energy systems; Multilevel converters; Modulation strategy; Converter control; MULTILEVEL CONVERTERS;
D O I：
10.1080/09398368.2013.11463863
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This paper discusses a grid-connected energy storage system based on two three-level (3L) converters: a DC-DC one and a neutral-point-clamped inverter. When compared to a system using standard two-level converters, the main advantages of this system are: higher efficiency, smaller reactive components allowing for a system cost reduction and its capability to handle higher voltage and power. A modulation strategy for the DC-DC converter which includes the neutral-point voltage balance control is proposed. The capability of the DC-DC converter to cancel the inverter's neutral-point voltage oscillations is also analyzed. Results are presented to illustrate the extended operation area without imbalances. Design guidelines to size the DC-link capacitors are given for a practical implementation. Experimental results taken from a 10 kW 3L DC-DC converter prototype are provided to show the capability of this particular converter to keep neutral-point voltage balance.
引用
收藏
页码：14 / 22
页数：9
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