特高压直流输电线路绝缘配置深化研究  

Further Research on Insulation Configuration of Ultra-high Voltage DC Transmission Lines

作　　者：王晶[1] 李永双[1] 李勇伟[1] 唐剑[1] 夏波[1] 王志强 WANG Jing;LI Yongshuang;LI Yongwei;TANG Jian;XIA Bo;WANG Zhiqiang(China Electric Power Planning&Engineering Institute,Beijing 100120,China)

机构地区：[1]电力规划设计总院,北京100120

出　　处：《电力勘测设计》2022年第7期10-16,共7页Electric Power Survey & Design

摘　　要：特高压直流输电线路的绝缘配置是否合理对于线路的安全运行至关重要,本文重点研究污秽和重覆冰绝缘配置方法。单片绝缘子的污秽闪络电压是污秽外绝缘配置的基础,本文在山西—江苏、锡盟—泰州、上海庙—山东±800 kV特高压直流输电线路耐张串绝缘子片数配置结果的基础上,通过污耐压法得到550 kN钟罩型绝缘子的单片污闪电压,可作为后续工程采用该绝缘子型号进行耐张串配置的基础数据。单片绝缘子的覆冰闪络电压是重冰区绝缘配置的基础,本文通过以往工程的重冰区绝缘子片数配置情况,推算得到不同盐密条件下的单片覆冰闪络电压。最后将550 kN绝缘子的单片污闪电压和单片冰闪电压进行了比较,基于V串真型试验最新成果,得到重冰区绝缘配置由污秽条件控制的结论。The insulation configuration of UHV DC transmission line is very important for the safe operation of the line.This paper focuses on the insulation configuration methods under pollution and heavy ice conditions.The pollution flashover voltage of single insulator is the basis of pollution external insulation configuration.Based on the configuration results of the tension string insulator pieces in Shanxi-Jiangsu,Ximeng-Taizhou,Shanghaimiao-Shandong±800 kV UHV DC transmission lines,the single-piece pollution flashover voltage of 550 kN bell jar insulator can be deduced through the pollution withstand voltage method.It can be used as the basic data of tension string configuration with this insulator model in subsequent projects.The icing flashover voltage of the single-piece insulator is the basis of insulation configuration in heavy ice area.It is calculated with different salt density through the configuration of insulator pieces in heavy ice area in previous projects.Finally,the single-piece pollution flashover voltage and single-piece icing flashover voltage of 550 kN insulators are compared.Based on the latest results of V-string true type test,the conclusion that insulation configuration in heavy ice area is controlled by pollution conditions is obtained.

关 键 词：特高压直流 人工污秽闪络试验 污秽闪络电压 重冰区 覆冰闪络电压 

分 类 号：TM72[电气工程—电力系统及自动化]