光伏直流汇集关键电力电子设备技术现状分析 |
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引用本文: | 夏琦,余滢婷,查鹏程,刘飞,孙建军,查晓明.光伏直流汇集关键电力电子设备技术现状分析[J].现代电力,2019,36(6):29-37. |
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作者姓名: | 夏琦 余滢婷 查鹏程 刘飞 孙建军 查晓明 |
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作者单位: | 武汉大学电气与自动化学院,湖北武汉 430072 |
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摘 要: | 光伏直流汇集与交流汇集相比,发电效率高,所需变流器级数少,且输电过程损耗小,输电容量大。但直流汇集的升压技术以及工程应用不及交流汇集成熟。通过分析光伏直流汇集所需的高升压比DC/DC变换器的拓扑结构,高频变压器的容量与工作频率,直流断路器的电压、电流及关断时间,分析了光伏直流汇集的工程应用可行性。
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关 键 词: | 光伏直流汇集 DC/DC变换器 高频变压器 直流断路器 |
收稿时间: | 2019-01-05 |
Technology Status Analysis of Key Power Electronic Devices for Photovoltaic DC-Connected Power Systems |
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Affiliation: | School of Electrical Engineering and Automation, Wuhan University, Wuhan 430072, China |
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Abstract: | Compared with the photovoltaic AC-connected power system, the photovoltaic DC-connected system has advantages of higher efficiency, less converters’ classes, smaller transmission loss, and larger transmission capacity. However, technologies and engineering applications of the photovoltaic DC-connected power system are not as mature as the AC system. Topologies of high boost ratio DC/DC converters, capacity and working frequency of high-frequency transformers, and voltage, current and turn-off time of DC circuit breakers are analyzed in this paper to illustrate the engineering application feasibility of photovoltaic DC-connected power systems. |
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