330kV升压变压器中性点保护问题讨论  

Discussions on Protection Methods for Neutral Point of the 330kV Step-up Transformer

作　　者：吕景顺[1] 王寅仲[1] 王欣[1] 彭鹏[1] 

机构地区：[1]甘肃电力科学研究院,兰州730050

出　　处：《电网与清洁能源》2010年第1期45-47,共3页Power System and Clean Energy

基　　金：国家863计划项目(2007AA04Z423)

摘　　要：描述并分析了甘肃电网330 kV发电厂升压变压器中性点接地方式及所承受的过电压种类和水平,提出这类变压器中性点保护方法,并给出了具体保护方案:采用合理的保护间隙保护330 kV变压器中性点绝缘的方案较可靠,也简便易行。In this paper, the writer looks into different grounding methods for neutral points, the types and levels of the over-voltages of the 330 kV step-up transformers. Based on the analysis, he proposes the protection method and concrete schemes for the neutral points. A reasonable protection gap as proposed turns out to be an easy and reliable solution for protection of the neutral point insulation of the 330 kV transformer.

关 键 词：变压器中性点 升压变压器 有效接地 保护间隙 

分 类 号：TM421[电气工程—电器]