智能变电站220 kV线路保护检修安全措施方案研究
李敏
（国网江苏省电力有限公司检修分公司，江苏 常州 213000）
摘 要：智能变电站在二次回路上的高度网络化，使得二次回路物理结构模糊，给检修安全措施实施带来不便。分析了智能站二次设备新功能特征和安全措施，以220 kV线路间隔为例，讨论了线路间隔常规校验和缺陷处理中涉及到的二次安全措施的实施。为确保二次虚回路的安全隔离，智能变电站安全措施的实施至少采取双重安全措施。在不破坏网路结构即不插拔光纤的情况下，安全措施的实施原则主要按照投入检修压板、退出出口软压板、退出接收软压板来实施隔离，设置安全防线。
关键词：智能变电站；二次回路；安全措施；检修机制
中图分类号：TM63；TM755 文献标识码：A 文章编号：1007-3175(2018)10-0039-04
Safety Measure Schematic Study on 220 kV Line Protection Overhaul in Intelligent Substation
LI Min
（State Grid Jiangsu Electric Power Co., Ltd, Maintenance Company, Changzhou 213000, China）
Abstract: The highly networking of secondary circuit in intelligent substation makes the physical structure of secondary circuit fuzzy, which causes inconvenience for overhauling safety precautions implementation. This paper analyzed the new function characteristics and safety precautions and took the 220 kV line interval for example to discuss the line interval convention verification and the secondary safety precautions implementation involved in the defects treatment. To guarantee the safety isolation of secondary virtual circuit, at least double safety precautions were adopted for the implementation of intelligent substation safety precautions. Under the conditions of non-destroying the network structure, non-insert-pullout optical fiber, the implementing principle of safety precautions mainly followed inputting overhaul pressing plate, quitting exit soft pressing plate, quitting accepting pressing plate to implement isolation and to set the safety defense line.
Key words: intelligent substation; secondary circuit; safety precaution; overhauling mechanism
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