±800kV典型直流设备电晕起始电压的海拔校正方法  

Altitude Correction Method for Corona Onset Voltage of ±800kV Typical DC Equipment

作　　者：范建斌[1] 谷琛[1] 李军[2] 宿志一[1] 李中新[1] 何宝龙[2] 殷禹[1] 甘伦 徐世山[2] 康钧[2] 

机构地区：[1]中国电力科学研究院,北京市海淀区100192 [2]青海电力科学试验研究院,青海省西宁市810008 [3]西藏电力试验研究所,西藏自治区拉萨市850000

出　　处：《中国电机工程学报》2008年第25期8-13,共6页Proceedings of the CSEE

基　　金：国家电网公司科技项目(SGSC[2005]81)

摘　　要：电晕特性是影响输电线路和电力设备设计的一个重要方面。目前我国正在设计建设的±800kV直流输电工程要途经高海拔地区。随着海拔的增加和电压等级的提高,设备的电晕性能也变得更加复杂,因此需根据当地的海拔、气候等情况通过海拔校正的方法确定满足运行要求的设备基本尺寸。选择了多种±800kV输电工程用典型直流设备,包括换流站用管母线、屏蔽环和线路用6分裂导线及其金具等作为试品,在北京、西宁和拉萨3个不同海拔地区进行可见电晕对比试验。基于海拔0～4000m的试验结果拟合出指数形式和线性形式的校正公式,并结合现有标准中海拔校正公式进行了比较和分析。结果表明,指数形式的公式校正误差较小;考虑到工程简便实用,也可采用线性校正公式。最后给出了工程用的设备通用海拔校正公式,并针对不同设备推荐了适用的校正方法。Corona performance plays an important role in the design of transmission lines and electrical equipment. In China, the planed ±800kV ultra HVDC transmission lines will pass through high altitude areas. Corona performance of equipment becomes more complicated when altitude and voltage class increase, and altitude and local meteorological conditions should be taken into consideration to determine the dimension of equipment used in those areas. Visible corona tests of different samples, including busbars and shielding ring used in converter stations and six bundled conductors and fittings used in transmission lines, of ±800kV UHVDC were carried out in Beijing, Xining and Lhasa where with different altitudes respectively. Test results were fitted to two types of formulas which compared with other formulas in existing standards. The results show that the errors of exponential form formula are less than others. Considering convenience of application, linear form formula is made for projects. General altitude correction formulas as well as those special ones for different equipment are also recommended.

关 键 词：起晕电压 ±800 kV特高压直流输电 直流设备 海拔校正 

分 类 号：TM85[电气工程—高电压与绝缘技术]