摘要
±800kV直流穿墙套管是特高压直流输电的关键设备之一,±800kV云南—广东特高压直流输电工程中的特高压直流穿墙套管在世界范围内属于首次研发和使用。介绍了±800kV直流穿墙套管的结构及其主要技术参数,给出了套管及其空心复合绝缘子的技术要求,重点阐述了套管的安装及现场试验,对直流耐压试验过程中出现的贯穿性闪络放电问题进行了阐述并从套管的外绝缘裕度、环境条件以及均压环的配置等方面分析了原因,介绍了其在新工程中外绝缘裕度的改进措施,为特高压直流穿墙套管的设计、制造提供依据。
The ±800 kV DC bushing is one of the most important equipment for the ±800 kV DC Transmission Project. The ±800 kV DC bushing used in the Yunnan-Guangdong Line ±800 kV DC Transmission Project is the first ±800 kV DC bushing in the world. This paper describes the dimension and inlet configuration of 800 kV bushing, the technical demands for the bushing and composite insulator are presented. The key technologies for field installation and test are given, and the flashover appeared in the DC withstander test and the insulation margin, environment;grading ring are discussed for this problem, and the improvement measure of insulation margin in the new project is also given, which is very helpful for the design and manufacture of ±800 kV DC bushing.
出处
《高压电器》
CAS
CSCD
北大核心
2013年第2期98-102,共5页
High Voltage Apparatus
