高海拔地区特高压变电站外绝缘配合方法探究  

Research on External Insulation Coordination Methods for UHV Substations in High Altitude Areas

作　　者：王健 展瑞琦 陈海焱[1] 姜海博 WANG Jian;ZHAN Ruiqi;CHEN Haiyan;JIANG Haibo(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》2024年第8期71-78,共8页Electric Power Survey & Design

摘　　要：合理确定高海拔地区特高压变电站的外绝缘水平对于保证电力系统的可靠性和经济性具有重要意义。本文梳理了现有的高海拔地区特高压外绝缘配合方法,以甘孜特高压变电站为例进行绝缘配合计算并与真型实验的结论进行对比,结果表明,现有的特高压外绝缘配合计算结果过于保守。此外,现有方法应用于高海拔地区时还存在间隙因数取值缺乏依据、海拔修正曲线与绝缘放电曲线的示意范围不足和标准绝缘水平序列过短的问题,为此,本文提出要进行不同海拔下的绝缘放电试验、完善各种结构间隙的放电函数与曲线、增加标准耐受电压序列等措施,为下一步研究工作指明了方向。It is extremely important to determine the external insulation level of Ultra High Voltage(UHV)substation in high altitude area to ensure the reliability and economy of power system.This paper reviews the existing methods of external insulation design for high-altitude areas,takes Ganzi UHV substation as an example to calculate its external insulation level and compares the results with the experimental results.The comparison results indicate that the existing calculation results of ultra-high voltage external insulation coordination are too conservative.In addition,when existing methods are applied to high-altitude areas,there are still problems such as lack of theoretical basis for selecting gap factor values,the schematic range of altitude correction curve and insulation discharge curve is insufficient,and he standard insulation level sequence is too short,thus,this paper proposes measures such as conducting insulation discharge tests at different altitudes,improving discharge functions and curves for various structural gaps,and increasing standard withstand voltage sequences,which indicates the direction for the future research work.

关 键 词：特高压变电站 外绝缘配合 海拔修正 空气间隙 

分 类 号：TM63[电气工程—电力系统及自动化]