常規備自投在擴大內橋接線變電站中的擴展應用
徐建委，夏懿，陳英普
（國網甘肅省電力公司經濟技術研究院，甘肅 蘭州 730050）
摘 要：備自投是變電站常見的一種二次保護設備，通過甘肅某地級市110 kV兩線兩變內橋接線變電站改造為三線三變擴大內橋接線變電站為例，提出一種采用兩套常規備自投裝置實現三線三變擴大內橋接線變電站的備自投邏輯，并給出了橋備自投、線路備自投及兩種備自投相結合的邏輯分析，實際運用表明，該方法簡單實用，對于實際110 kV變電站的新建或者改造有很好的指導意義。
關鍵詞：內橋接線；擴大內橋接線；運行方式；變壓器保護；備自投；橋備自投；線路備自投；橋、線路備自投相結合
中圖分類號：TM762.1 文獻標識碼：A 文章編號：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
參考文獻
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