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| 摘要: |
| 带母联接线方式的母线保护中存在死区,常规的微机母线保护是靠先后切除2段母线上的所有连接元件来解决该问题,但多跳了1条健全母线。对此,提出通过引进2组母联电流互感器(TA)并适当对死区保护进行2种改进:一是把2组母联TA 2路电流做成1个母联小差保护;二是仍采用常规的2组TA交叉接法,但对保护流程作一些修改。 |
| 关键词: 母线保护,死区保护,2组母联电流互感器 |
| DOI： |
| 分类号:TM773 |
| 基金项目: |
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| Dead zone protection with dual busbar-tie current transformers |
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TANG Zhi-guo MAO Nai-hu ZHANG Fa-jin
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| Abstract: |
| There is a dead zone in busbar protection with busbar-tie.Its traditional solution is to cut off all elements connected with two busbars,causing the healthy busbar out-of-work.A scheme with dual busbar-tie CTs(Current Transformers) is presented.It improves the dead zone protection in two ways:using currents of dual busbar-tie CTs to form a busbar-tie differential protection;modifying the protection flow while keeping regular cross connection for the dual CTs. |
| Key words: busbar protection,dead zone protection,dual busbar-tie CTs |
