电网技术2024，Vol.48Issue(4)：1787-1798,中插96-中插97,14.DOI:10.13335/j.1000-3673.pst.2023.0774
超高海拔地区1000kV变电站导线连接金具防晕型结构设计与优化
Design and Optimization of Corona-proof Structure for Wire Connection Hardware at 1000kV Substations in Ultra-high-altitude Areas
摘要
Abstract
The design of anti-corona fittings is the key to the prevention and control of corona and electromagnetic environment at the UHV substations,especially in high-altitude areas where corona prevention is particularly important.In this article,by using the finite element simulation combined with the experimental,the altitude correction index formulas,the linear formulas,and the metal surface field strength control values that meet the engineering requirements are proposed.The electric field distribution on the surface of the wire connection fittings at the high-altitude UHV substations is calculated,and the structural optimization schemes for each of the wire connection fittings are provided,which are verified through the high-altitude corona tests.The results show that the correction coefficient for the 4000m altitude calculated in this proposed method is 1.51,which is 1.9％different from the recommended value of Q/GDW 551-2010.The differential control should be carried out on the surface field strength of the wire connection fittings at the high-altitude UHV substations:the upper layer fittings should not exceed 1.32kV/mm thick with the local not thicker than 1.52kV/mm;the lower level hardware should not exceed 0.99kV/mm thick with the local not thicker than 1.14kV/mm.When adopting the recommended scheme in this article,the corona extinction voltage of all the wire connection fittings is higher than 698.5kV but maintains a certain safety margin,which is able to meet the requirements for the use at the 4000m high altitude 1 000kV substations.The research results of this article will provide a basis for the design of the anti-corona fittings for the l000kV substations at the ultra-high-altitude areas in China,assisting in the construction of a green and environmentally friendly new energy system in China.关键词
4000m/超高海拔/1000kV变电站/电晕防治/导线连接金具/结构优化Key words
4000m/ultra-high-altitude/1000kV substation/corona prevention and control/wire connection fittings/structural optimization分类
信息技术与安全科学引用本文复制引用
张军,刘鹏,滕文涛,李瑶琴,谢梁,彭宗仁,刘闯..超高海拔地区1000kV变电站导线连接金具防晕型结构设计与优化[J].电网技术,2024,48(4):1787-1798,中插96-中插97,14.基金项目
国家电网有限公司科技项目(SGZB0000TGJS2300884).Project Supported by Science and Technology Projects of State Grid Corporation of China(SGZB0000TGJS2300884). （SGZB0000TGJS2300884）
