±800kV特高压直流换流站交、直流滤波器用金属氧化物避雷器的研究

Research on Metal Oxide Surge Arrester for AC&DC Filter of ±800 kV UHVDC Converter Station

基于±800 kV特高压直流换流站交、直流滤波器的结构和工程配置的基础上,详细分析了滤波器内金属氧化物避雷器的稳态应力和暂态应力,研究了2项关键技术:1)MCOV的选取;2)强雷电冲击电流下金属氧化物电阻片的能量吸收能力。以锦屏-苏南±800 kV特高压直流工程为依托,设计了HP3高端金属氧化物避雷器(FA),产品通过了中国电力科学研究院的型式试验,满足工程需要。

Based on the structure and engineering configuration of AC＆DC filters for ±800 kV UHVDC converter station, a detailed analysis of the steady stresses and transient stress of metal oxide arrester inside the filter is carried out. 2 key technologies are studied： 1） the selection of MCOV; 2） energy absorption capability of metal oxide varistor under strong lightning impulse current. Taking Jinping -Sunan ±800kV UHVDC project as the basis, the high-end HP3 metal oxide arrester （FA） is designed, the product has passed the type test of China Electric Power Research Institute, meet the needs of project.