摘要
川藏联网工程输电线路经过地区年平均雷暴日高达70日,线路雷击跳闸率较高,需要在雷电易击塔和易击相加装线路避雷器。鉴于目前国内外尚没有500 kV高海拔线路避雷器,因而对其开展了专题研究,分别给出了串联纯空气间隙和串联绝缘子支撑间隙线路避雷器的结构设计和技术参数初步推荐值。同时给出了500 kV高海拔线路避雷器的配置原则和配置方法,并对线路避雷器的实施效果进行了仿真计算。结果表明:加装线路避雷器后,乡城—巴塘线路段的雷击跳闸率可由0.24次/(100 km·a)降低至0.13次/(100 km·a),巴塘—昌都线路段的雷击跳闸率可由0.17次/(100 km·a)降低至0.11次/(100 km·a)。研究成果对保障川藏联网工程的防雷安全具有重要意义,对后续工程亦具有参考价值。
In the Tibet power grid and Sichuan power grid interconnection project, annual average thunderstorm of transmission lines passing region is up to 70 days. The values of lightning trip rate are high, so it is necessary to install line arresters on towers and phases to be easily struck by lightning. Because there is no 500 kV high altitude line arrester at home and abroad by now, we researched and put forward preliminary recommended values of structure designs and technical parameters for arresters with pure air clearance in series and arresters with insulator supporting clearance in se- ries. Moreover, the configuration principle and configuration method of 500 kV high altitude line arrester were given, and the effectiveness of line arrester was simulated. The results indicated that, after line arresters were installed, lightning trip rate of transmission line from Xiangcheng to Batang could be reduced from 0.24 to 0.13 per 100 kilometers annually, and lightning trip rate of transmission line from Batang to Changdu could be reduced from 0.17 to 0.11 per 100 kilo-meters annually. Research results are of great significance to guarantee lightning protection safety of Tibet power grid and Sichuan power grid interconnection project. And the results also have reference value to following projects.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2016年第11期3442-3447,共6页
High Voltage Engineering
基金
川藏联网工程科研专题(GYB11201505023)~~
关键词
川藏联网工程
多雷区
高海拔
雷击跳闸率
线路避雷器
串联纯空气间隙
串联绝缘子支撑间隙
the Tibet power grid and Sichuan power grid interconnection project
area with more lightning activities
high altitude
lightning trip rate
line arrester
pure air clearance in series
insulator supporting clearance in series
