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| 摘要: |
| 中阻母差保护运行中出现一些值得探讨的特殊问题，在保护屏端子排上短接其中一支路的二次电流后，端子排进保护的电流回路上仍有电流；在母线倒闸操作过程中，合上互联压板以后，若此时发生母线区故障，则保护可能拒动。前者使得运行人员难以判断电流是否已被短接，后者会导致系统保护不正确动作。针对这些问题进行了分析，从原理和回路上进行了详细的技术解释，并提出了解决方法。 |
| 关键词: 中阻母差保护 继电保护 电力系统 母线保护 |
| DOI： |
| 分类号:TM773 |
| 基金项目: |
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| Discussion about mid-impedance bus differential protection |
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| Abstract: |
| There are two problems during the operation of mid impedance bus differential protect in power system.The first one is the existence of current on the input current circuit of protection when the secondary current of one branch is shorted.It makes the operator confused in judging whether the current is shorted.The second one is that the protection may refuse to act on in zone bus fault after the inter link bar is pressed during bus switchover.The technical explanations in both principle and circuit and the solutions are given. |
| Key words: mid impedance bus differential protection,problem,technical explanation, |
