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基于智能模块的高压直流真空断路器研究

, PP. 47-55

Keywords: 能源互联网,智能电网,智能模块,高压直流真空断路器,介质恢复

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Abstract:

作为能源互联网重要组成部分的智能电网近年来发展迅速,其中高压直流输电以交流系统不可替代的优点,在可再生能源如风电与光伏发电集电网等方面具有广泛的应用前景。但目前为止,担负着控制和保护双重任务的核心组件——高压直流断路器自主研发仍存在技术瓶颈。该文通过高压直流短路开断的典型方案分析,提出了基于快速机构与联动关合的换流开断技术,给出由直流智能真空开关模块串联组成HVDC断路器的总体设计方案,为高压直流断路器的发展开辟一条新的路径。在直流真空开关分断过程分析中,分别利用连续过渡模型、Farrall公式、击穿统计特性对直流真空断路器电弧强迫过零点弧后介质恢复前期、中期及后期进行数值仿真分析,并采用对照分析方法分析介质恢复各阶段主要影响因素及其效应。该研究引用交流系统智能真空开关模块串联开断的成功经验探索HVDC短路开断新的路径,并给出了直流电弧分断过程的零区分析,可指导直流真空开关模块的开发。

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