A new power converter for fuel cells with high system efficiency

被引：23

作者：

Andersen, GK ^{[1
]}

Klumpner, C ^{[1
]}

Kjær, SB ^{[1
]}

Blaabjerg, F ^{[1
]}

机构：

[1] Aalborg Univ, Inst Energy Technol, DK-9220 Aalborg, Denmark

来源：

INTERNATIONAL JOURNAL OF ELECTRONICS | 2003年 / 90卷 / 11-12期

关键词：

Dynamic response - Electric inverters - Electric power systems - Electric switches - Electric transformers - Fuel cells - Topology - Voltage control;

D O I：

10.1080/0020721031000666401

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 presents a new high-efficiency grid-connected single-phase converter for fuel cells. It consists of a two-stage power conversion topology. Since the fuel cell operates with a low voltage in a wide voltage range (25 V-45 V) this voltage must be transformed to around 3 50-400 V in order to be able to invert this de power into ac power to the grid. The proposed converter consists of an isolated dc-dc converter cascaded with a single-phase H-bridge inverter. The dc-dc converter is a current-fed push-pull converter. The inverter is controlled as a standard single-phase power factor controller with resistor emulation at the output. Experimental results of converter efficiency, grid performance and fuel cell dynamic response are shown for a I kW prototype. The proposed converter exhibits a high efficiency in a wide power range (higher than 92%) and the inverter operates with a near-unity power factor and a low current THD.

引用

页码：737 / 750

页数：14

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