高电压技术2012，Vol.38Issue(10)：2728-2734,7.
半波长输电线路的工频暂态过电压
Power Frequency Temporary Overvoltage on Half-wave Length AC Transmission Lines
摘要
Abstract
Due to its unique structure,the over-voltage level of the half-wavelength transmission lines is significantly different from that of the conventional short lines,which makes the internal over-voltage one of the key technical issues for developing the half-wavelength transmission technology.Thus,we investigated the power frequency temporary overvoltage on half-wave length AC transmission lines.Firstly,the power-angle characteristics of the half-wavelength transmission lines were briefly analyzed.The capacitance effect of unloaded lines according to the half-wavelength transmission lines were also described with and without considering the source impedances respectively.Based on typical parameters of the ultra-high voltage transmission lines,a simulation model for the half-wavelength transmission lines was established,of which the capacitance effect of unloaded lines was compared with that of short distance transmission lines.Secondly,the impacts of the transmission power,the man-made tuning network type and the line length on the power frequency over-voltages were emphatically researched under two operating conditions,i.e.the asymmetrical faults and the load shedding,and the results were compared with that along the conventional UHV transmission lines.The simulation results shows that,the power frequency overvoltage of the half-wavelength transmission lines is much more serious under asymmetrical fault than that under load shedding;in both situations,the power frequency overvoltage on the half-wavelength transmission lines under capacitance type tuning is lower than that by π type and T type tuning.关键词
半波长线路/工频过电压/电容效应/不对称故障/甩负荷/调谐网络Key words
half-wavelength transmission line/power frequency over-voltages/capacitance effect/asymmetrical fault/load shedding/man-made tuning network分类
信息技术与安全科学引用本文复制引用
张黎,邹亮,吕鑫昌,李庆民,王冠,师伟..半波长输电线路的工频暂态过电压[J].高电压技术,2012,38(10):2728-2734,7.基金项目
国家电网公司科技项目 （）
