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| 摘要: |
| 主变中压侧采用双开关有节省一次设备投资、方便开关检修、运行方式灵活及操作简单等优点，但给保护二次回路的设置带来一些新的问题，如可能造成二段母线TV二次例的非同期并列运行，基至可能导致保护误动作。对此进行了分析，并对保护电压回路的进一步改造进行了探讨，在利用原有设备，不增加投资的情况下，从二次回路方面解决问题。并提出，不得因一次设备停电困难放弃试验而留下隐患。 |
| 关键词: 双开关 电压切换 保护误动 改造 |
| DOI： |
| 分类号:TM645 |
| 基金项目: |
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| Study on double switch and voltage switch circuit |
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HUANG Yan-man
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| Abstract: |
| The application of double switch to mid-voltage side of main transformer save s the in-vestment of primary equipment ,simplifies the maintenance and operat ion.However,it may bring up some troubles to the equipment in secondary circ uit,for examples,the non-sync parallel operation of the PTs on two bus line s and the incorrect operation of relay protection.The causes are stu-died and the improvement on voltage circuit of protection is analyzed,which adopts the original equipment and solves the problem in secondary circuit without increas ing investment.Do not give up the test and leave the hidden trouble behind due to the difficulty of cutting off the primary equipment. |
| Key words: double swit ch,voltage switching,incorrect operation improvement, |
