±800kV特高压直流绝缘子可靠性分析  

Reliability Analysis of ±800 kV UHVDC Insulators

作　　者：吴光亚[1] 罗兵 王蕙[1] 

机构地区：[1]国网电力科学研究院,武汉430074 [2]南方电网公司技术研究中心,广州510623

出　　处：《高电压技术》2008年第9期1802-1806,共5页High Voltage Engineering

基　　金：“十一五”国家科技支撑计划重大项目(2006BAA02A31)~~

摘　　要：±800kV特高压直流工程在电气、机械、运行可靠性等方面对绝缘子提出了比1000kV特高压交流工程和±500kV超高压直流工程更高的技术要求。为评估我国±800kV直流绝缘子的可靠性，分析了我国±800kV直流盘形悬式、支柱和复合空心绝缘子的制造技术及发展水平，认为我国±800kV直流绝缘子的综合技术已达国际领先水平。评估了该技术和经济可靠性，认为盘形悬式瓷和玻璃绝缘子在经济性上具有可比性，但盘形悬式复合绝缘子更具优势；瓷、瓷复合化绝缘子在经济件上具有可比性，但瓷复合化绝缘子更具优势。为确保绝缘子的运行可靠性，建议非常轻和轻污秽等级的绝缘子悬垂“Ⅰ”串优先采用160～420kN双伞型瓷绝缘子，中和重污秽等级的绝缘子悬垂“Ⅰ”串优先采用复合绝缘子；还建议在结构高度约12m的支柱瓷绝缘子瓷件表面涂敷持久性防污闪涂料（PRTV）。Compared to 1000 kV UHVAC and ±500 kV DC transmission line, the higher electrical,mechanical and reliable performances of insulators are required for the ±800 kV UHVDC project. It is concluded that the synthesis technology of ±800 kV UHVDC insulators in our country reaches the highest international level on the basis of analyzing manufacture technology and development level for ±800 kV UHVDC Insulators. After evaluating the technological and economic reliability,it is considered that cap and pin porcelain and glass insulators are comparable in economy, but cap and pin insulators with composite shed is preponderant. To ensure operation reliability of insulators, it is advised that 160-420 kN two outer shed porcelain insulators should be used in priority for suspension string in very light and light pollution,and composite insulators in priority for suspension string in medium and heavon pollu tion. It is also advised that the PRTV should be used in post insulators of porcelain material with 12 m height.

关 键 词：±800 KV 直流 特高压 绝缘子 可靠件 选型 

分 类 号：TM723[电气工程—电力系统及自动化] TM216[一般工业技术—材料科学与工程]