摘要
高海拔地区直流输电线路的电晕比低海拔地区更严重,测量和评估输电线路的电晕损耗,对线路设计和经济运行有重要指导意义。因此研制了电晕电流测量装置,并依托特高压技术国家工程实验室(昆明),测量了不同线路结构参数下特高压直流试验线段的电晕损耗,分析了线路结构参数、电压等对电晕损耗的影响,提出了2100m高海拔地区直流输电线路电晕损耗预测经验公式。研究结果表明:电晕损耗随电压的增加呈指数上升;在给定的电压下,双极加压时导线的总电晕损耗远大于单极加压时的损耗;负极导线电晕损耗略大于正极导线电晕损耗;电晕损耗随导线高度的变化不大,随线路极间距的增加而降低,随分裂间距的增加而增加;所提出的经验公式更适合预测高海拔地区(海拔约2100m)的直流输电线路的电晕损耗。
The corona phenomenon of DC transmission line in the high altitude areas would be worse than that in the low altitude areas.Measuring and evaluating the corona loss of transmission line is significant for transmission line design and economic operation.So,a kind of measurement equipment for corona loss（CL） was developed.The corona loss of UHVDC transmission line with different structure size was measured in High Voltage Technology National Engineering Laboratory（Kunming）.Influences of structure size,applied voltage and conductor surface field strength were analyzed.An empirical formula for UHVDC transmission line CL prediction in high altitude area was proposed.Results show that CL increases exponentially with the applied voltage.Under the same voltage lever,total CL with bipolar voltage applied is much higher than that of mono-polar voltage applied.CL of the negative pole is slightly bigger than of positive pole.CL would be decrease with increasing of pole distance and decreasing of bundle spacing.The proposed empirical formula is more proper at high altitude（about 2100m above sea level）.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2011年第3期746-751,共6页
High Voltage Engineering
基金
国家自然科学基金(50907036)
南方电网公司科技项目(K0804)~~
关键词
高海拔地区
特高压(UHV)
直流输电线路
电晕损耗
测量装置
经验公式
high altitude area
ultra high voltage（UHV）
HVDC transmission line
corona loss
measuring apparatus
empirical formula
