常规备自投在扩大内桥接线变电站中的扩展应用
徐建委，夏懿，陈英普
（国网甘肃省电力公司经济技术研究院，甘肃 兰州 730050）
摘 要：备自投是变电站常见的一种二次保护设备，通过甘肃某地级市110 kV两线两变内桥接线变电站改造为三线三变扩大内桥接线变电站为例，提出一种采用两套常规备自投装置实现三线三变扩大内桥接线变电站的备自投逻辑，并给出了桥备自投、线路备自投及两种备自投相结合的逻辑分析，实际运用表明，该方法简单实用，对于实际110 kV变电站的新建或者改造有很好的指导意义。
关键词：内桥接线；扩大内桥接线；运行方式；变压器保护；备自投；桥备自投；线路备自投；桥、线路备自投相结合
中图分类号：TM762.1 文献标识码：A 文章编号：1007-3175(2019)03-0033-04
Conventional Spare Power Automatic Switching Extended Application in Expanding Inner Bridge Wiring Substation
XU Jian-wei, XIA Yi, CHEN Ying-pu
（State Grid Gansu Economic Research Institute, Lanzhou 730050, China）
Abstract: The spare power automatic switching is a kind of secondary protection equipment commonly used in substations. Taking the transformation of 11 0 kV two-line two-variable inner bridge wiring substation in certain prefecture-level city of Gansu into a three-line threevariable expanded inner bridge wiring substation as an example, this paper proposed a kind of two set of conventional spare power automatic switching devices to realize the spare power automatic switching logic of three-line three-variable expanded inner bridge wiring substation and gave the logical analysis of bridge spare power automatic switching, circuit spare power automatic switching and the combination of two kind of spare power automatic switching. The practical use shows that this method is simple and practical, and has a good guiding significance for the construction or transformation of the actual 11 0 kV substation.
Key words: inner bridge wiring; inner bridge wiring expanding; operation mode; transformer protection; spare power automatic switching; bridge spare power automatic switching; circuit spare power automatic switching; the combination of bridge and circuit spare power automatic switching
参考文献
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[2] 钟世民，于立涛，陈胜，李辰.110 kV扩大内桥接线变电站运行分析[J]. 陕西电力，2016，44(12)：76-79.
