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直流微网混合式零电压开关直流断路器

DOI: 10.13336/j.1003-6520.hve.2015.09.046, PP. 3148-3155

Keywords: 零电压开关,混合式直流断路器,IGBTs并联技术,斥力机构,电弧模型,电流转移特性

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Abstract:

随着分布式电源技术的发展,直流微网是未来发展的新方向,应用于直流微网快速保护的直流断路器是推动微网发展的关键技术。为此根据直流微网的保护要求提出了一种快速保护的混合式零电压开关(ZVS)直流断路器总体方案,设计了混合式直流断路器的结构和控制系统,并对其关键技术基于快速斥力机构的真空开关,IGBTs并联技术和限压技术展开了研究。最后基于Mayr电弧模型和真空开关电弧电压建立了ZVS混合式直流断路器的仿真模型,仿真得到了混合式断路器的电流转移特性和开断配合特性。最后根据研究结论,综合得到了400V/2500A开断电流10kA,闭合时间200μ;s,开断故障电流时间<;2ms的混合式直流断路器总体方案。

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