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基于耦合负压电路的混合式直流断路器拓扑研究

更新时间:2020-10-27 13:31:33 大小:4M 上传用户:zhengdai查看TA发布的资源 标签:断路器 下载积分:2分 评价赚积分 (如何评价?) 打赏 收藏 评论(0) 举报

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随着直流输电的发展,对直流输电系统的可靠性要求也越来越高,针对如何在直流电网中应用数毫秒内开断大电流的直流断路器,快速切除故障设备或线路,一种基于耦合负压电路与电力电子开关串联的低损耗强制换流混合式直流断路器被提出。通过拓扑结构原理的分析研究,耦合负压电路可以保证各个电流等级下,电流转移过程的可靠性。这种新型断路器结合了机械开关和固态开关的优点,通态损耗低,开断特性好,具有一定的应用前景。

With the development of DC transmission,the reliability requirements of DC transmission system becomes higher.Aiming at how to use the DC circuit breaker with large current to cut off the fault equipment or lines in a few milliseconds in DC power grid,a low loss forced commutation hybrid DC circuit breaker based on the coupling negative pressure circuit and the series connection of electric force electronic switch is proposed.Through the analysis and research of the topological structure principle,the coupling negative pressure circuit can ensure the reliability of the current transfer process under each current level.It combines the advantages of mechanical switch and solid-state switch,with low on-state loss and good breaking characteristics,and it has a certain application prospect.

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