變電站10 kV系統(tǒng)接地方式技術(shù)改造
謝明磊
（廣東電網(wǎng)有限責任公司梅州供電局，廣東 梅州 514021）
摘 要：為兼顧供電可靠性和人身設(shè)備安全，保證發(fā)生單相瞬時故障時能促進弧光自熄，且當發(fā)生永久性接地故障則發(fā)出跳閘信號切除故障線路，將110 kV丙村變電站10 kV不接地系統(tǒng)改造成故障相經(jīng)電抗器接地系統(tǒng)，闡述了故障相經(jīng)小電抗接地方式的工作原理，并給出了具體技術(shù)改造方案和注意事項，現(xiàn)場調(diào)試結(jié)果表明，該站技術(shù)改造達到了預期目的。
關(guān)鍵詞：不接地系統(tǒng)；故障相經(jīng)電抗器接地；技術(shù)改造
中圖分類號：TM645 文獻標識碼：B 文章編號：1007-3175(2017)09-0041-03
Technical Transformation of 10kV Power System Grounding Method for Substations
XIE Ming-lei
（Meizhou Power Supply Bureau, Guangdong Power Grid Corporation, Meizhou 514021, China）
Abstract: In order to balance power supply reliability and the safety of personnel and equipment, to guarantee the arc light self-extinguishing when the single-phase transient fault occurs, and to send a trip signal to cut off the fault line when a permanent grounding fault occurs, the 10 kV isolated neutral system of 110 kV Bing village substation was reformed to become the reactor grounding system through faulty phase. This paper expounded the working principle of reactor grounding through faulty phase mode and gave the concrete technical transformation plan and matters need attention. The field debugging result shows that this technical transformation reaches the expected goal.
Key words: isolated neutral system; reactor grounding through faulty phase; technical transformation
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