110kV～220kV分级绝缘变压器中性点放电间隙的配置建议  

Configuration Suggestion of Neutral Point Discharge Gap of 110kV～220kV Graded Insulation Transformer

作　　者：马铂浩 MA Bohao(Zhuhai Huacheng Electric Power Design Institute Co. ,Ltd. ,Zhuhai 519085,China)

机构地区：[1]珠海华成电力设计院股份有限公司,广东珠海519085

出　　处：《电工技术》2019年第7期40-41,44,共3页Electric Engineering

摘　　要：对于分级绝缘变压器,当有效接地系统中形成局部不接地系统时,会产生较高的工频过电压,因此通常会在中性点配置放电间隙以保护中性点绝缘。但在实际运行中,间隙烧损情况较为普遍,往往动作数次后就变形无法使用。为此对现有的几种放电间隙进行比较、选择,并给出中性点设备配置建议。For the graded insulation transformer, when a local ungrounded system is formed in the effective grounding system, a high power frequency overvoltage is generated, and a discharge gap is usually arranged at the neutral point to protect the insulation. However, in actual operation, the discharge gap was often burned out after several times of operation. To solve the problem, several existing discharge gaps were compared and the configuration suggestions were given.

关 键 词：变压器 分级绝缘 中性点 放电间隙 

分 类 号：TM403.5[电气工程—电器]