南方电网技术2016，Vol.10Issue(9)：55-60,6.DOI:10.13648/j.cnki.issn1674-0629.2016.09.009
2 km海拔下直流线路金具起晕场强预测修正方法
Prediction Method of Corona Inception Field Intensity for HVDC Line Fittings at 2 km Altitude
李敏 1刘磊 1余占清 2李斌 1高超 1厉天威 1戴梦婷2
作者信息
- 1. 直流输电技术国家重点实验室 南方电网科学研究院，广州510663
- 2. 清华大学电机系，北京100084
- 折叠
摘要
Abstract
Corona inception field strength is one of the important parameters for the design of fittings in ± 800 kV DC transmission line. So far Peek formula is still the basis for the prediction of corona inception field strength of DC line fittings with large size at high altitude area. Peek formula was obtained by experimental results of electrode with curvature radius less than 50 mm at standard atmos-pheric pressure. Because the discharge mechanism of the electrode with large curvature radius (larger than 100 mm,hereafter the same)and 3D structure is different,Peek formula is inaccurate for predicting the corona inception field strength for this kind of elec-trode,especially at high altitude area. In order to predict the corona inception field strength of the fittings with larger curvature radius and non-cylinder structure accuratly,a test platform for HVDC fittings is set up in Kunming high voltage laboratory at 2 100 m alti-tude. Corona inception voltages are measured for test tubes and rings in the lab. Correction method to Peek formula is proposed firstly for the electrode with larger curvature and 3D structure at high altitude area. This method will become one of the theory evidences for the design of HVDC fittings at 2 km altitude area.关键词
高海拔地区/直流线路金具/起晕场强/修正方法/高斯曲率Key words
high altitude area/HVDC line fittings/corona inception field strength/modifier formula/Guass curvature分类
信息技术与安全科学引用本文复制引用
李敏,刘磊,余占清,李斌,高超,厉天威,戴梦婷..2 km海拔下直流线路金具起晕场强预测修正方法[J].南方电网技术,2016,10(9):55-60,6.
