特高压避雷器工频电压耐受时间特性研究  

Research on Power-Frequency Voltage Withstand Time Characteristic of UHV MOA

作　　者：吕雪斌[1] 张搏宇[1] 贺子鸣[1] 张翠霞[1] 殷禹[1] 时卫东[1] 

机构地区：[1]中国电力科学研究院,北京100192

出　　处：《电瓷避雷器》2017年第6期51-56,61,共7页Insulators and Surge Arresters

基　　金：国家电网公司科技项目(编号:XTB17201600058)

摘　　要：工频电压耐受时间特性是避雷器最重要的技术参数之一,关系着避雷器的额定电压等基本参数的选择及避雷器长期安全可靠性。结合现有试验条件和标准规定,研究了特高压避雷器用电阻片工频电压极限耐受时间特性试验方法,并选取4种电阻片开展了试验研究。提出若某一特高压工程的工频暂时过电压低于线路侧1.4 pu或母线侧1.3 pu时,从工频电压耐受的角度考虑,可适当进一步降低特高压避雷器的额定电压至780kV。推荐特高压变电站高抗中性点避雷器采用4柱并联结构;不建议采用单柱结构。Power-frequency voltage withstand time characteristics is one of the most important tech- nical parameters of metal-oxide arrester, which related to the selection of basic parameters, such as the rated voltage of the MOA, and the long-term safety and reliability of the MOA. According to the standard requirements and the actual conditions of test equipments, the test method of power-frequency voltage withstand time characteristics is studied and the experimental study on four kinds of varistors is carried out. It may be appropriate to further reduce the rated voltage of UHV arrester to 780 kV if the power fre- quency over voltage is lower than 1.4 pu or 1.1.3 pu on the busbar side. It is recommended that neutral point arrester of UHV substation should contain four parallel varistor, but not a single column structure.

关 键 词：特高压 避雷器 电阻片 工频电压耐受时间特性 温度 能量 

分 类 号：TM862[电气工程—高电压与绝缘技术]