不同海拔下750kV输电线路导线起始电晕特性研究  

Research on Corona Inception Characteristics of 750 kV Transmission Line Conductors at Different Altitudes

作　　者：律方成[1] 耿庆忠[1] 朱雷[1] 刘云鹏[1] 朱军[1] 

机构地区：[1]华北电力大学河北省输变电设备安全防御重点试验室,保定071003

出　　处：《高压电器》2013年第9期1-6,共6页High Voltage Apparatus

基　　金：国家重点基础研究发展计划(973计划)(2011CB209401);国家自然科学基金(51277073);高等学校博士学科点专项科研基金项目(20100036110004)~~

摘　　要：为了深入研究海拔0～3000m范围海拔对交流输电线路导线起始电晕特性的影响。基于可移动式电晕笼，在武汉、西宁、海北进行了交流6×LGJ～400／50导线的电晕特性试验，用紫外成像仪记录导线电晕放电后产生的光子数。利用“切线法”求取导线的电晕起始电压。通过武汉、西宁和海北3个海拔点导线在晴朗天气下的电晕起始电压测量结果，发现导线起晕电压随海拔升高而显著下降。海拔每升高1000m，导线起晕电压降低8．12％。且它们不适合用GB／T 2317．2—2000或GB／T 775．2—2003中校正金具和绝缘子公式进行海拔校正．得到了适合于6×LGJ～400／50导线的指数和线性海拔校正公式，误差〈5％，可为工程建设提供参考。In order to in-depth study the effect of attitude for corona inception characteristics of AC transmission lines conductors in the altitudes area ranging from 0 to 3 000 meters,based on a mobile corona cage,conducted a series of tests about the corona characteristics of AC 6×LGJ-400/50 conductors based on the mobile corona cage at Wuhan,Xining and Haibei respectively. The numbers of photons were detected after conductor corona discharge by the ultraviolet detection apparatus. According to the apparent change of photons number,corona inception voltages were acquired by the tangent method. Corona inception voltage is reduced about 8.12% if altitude rises 1 000 m. And it is found that the correction formulas of hardware and insulators in GB/T 2317.2-2000 and GB/T 775.2-2003 are not appropriate for altitude correction. Finally, the exponential and linear correction formulas suitable for 6 × LGJ-400/50 conductors are introduced. The maximum error is less than 5%.It can provide a reference for the construction.

关 键 词：电晕笼 高海拔 紫外成像 起晕电压 6分裂导线 电晕放电 

分 类 号：TM755[电气工程—电力系统及自动化]