110 kV全絕緣變壓器中性點過電壓保護(hù) 

黃燕飛，齊茜茜，夏子路，付薇 
(中國石油集團(tuán)工程設(shè)計有限責(zé)任公司華北分公司,河北 任丘 062552) 
 

摘 要：介紹了110 kV 系統(tǒng)接地運(yùn)行和全絕緣變壓器的使用情況，分析了110 kV 變壓器中性點的過電壓水平，通過研究相關(guān)規(guī)范資料，結(jié)合以往設(shè)計經(jīng)驗，對110 kV 全絕緣變壓器中性點的過電壓保護(hù)提出解決辦法，其中性點采用二次繼電保護(hù)和避雷器作為過電壓保護(hù)措施，避雷器的參數(shù)選擇，應(yīng)根據(jù)其過電壓水平確定。
關(guān)鍵詞：全絕緣變壓器；不接地運(yùn)行；中性點；過電壓保護(hù)；避雷器
中圖分類號：TM63；TM415 文獻(xiàn)標(biāo)識碼：B 文章編號：1007-3175(2015)11-0036-02

Neutral Point Overvoltage Protection of 11 0 kV All-Insulating Transformer 

HUANG Yan-fei, QI Qian-qian, XIA Zi-lu, FU Wei 
（North China Branch of China Petroleum Engineering Design Co., Ltd, Renqiu 062552, China） 
 

Abstract: Introduction was made to the 11 0 kV system grounding operation and the service condition of all-insulating transformers. This paper analyzed the overvoltage level of 11 0 kV transformer neutral point. By researching the relevant standard information and combining formerly design experience, this paper proposed the solution to solve the problem of 11 0 kV transformer neutral point overvoltage protection.The neutral point took the secondary relaying protection and arrester as overvoltage protection measures and the arrester parameters selection should be determined by the overvoltage level.
Key words: all-insulating transformer; earth-free operation; neutral point; overvoltage protection; arrester

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