常规差错分析方法基于对称的部件假定未调换的传播线的三阶段的参数在差错的情况下是对称的。方法与对称的分布式的参数电路引起的误差作为未调换的极端高电压(UHV ) 的相等的电路当模特儿传动线在正常操作和差错下面被学习，并且产生的相应问题被指出。由对比与电磁短暂并且有不均匀的分布式的参数电路的力量电子学( EMTPE )模拟结果未调换的线当模特儿，常规方法不能显示出存在，这被显示出否定并且零在差错发生前定序，在差错发生以后电压和电流上有许多错误哪个与差错类型是不同的。电压和电流的错误范围是 2.13%81.13% 并且 −7.82%−86.15% 分别地。
The conventional fault analysis method based on symmetrical components supposes that the three-phase parameters of un-transposed transmission line are symmetrical in case of fault. The errors caused by the method with the symmetrical distributed parameter circuit model as the equivalent circuit of the un-transposed ultra high voltage（UHV） transmission line were studied under both normal operation and fault,and the corresponding problems arising were pointed out. By contrast with electromagnetic transient and power electronics（EMTPE） simulation results with the asymmetrical distributed parameter circuit model of un-transposed line, it is shown that the conventional method cannot show the existence of negative and zero sequences before fault happening and there are many errors on voltage and current after fault happening which are different with fault types. The error ranges of voltage and current are 2.13%— -81.13% and -7.82%— -86.15%, respectively.
Transactions of Tianjin University
un-transposed UHV transmission line
Correspondence to WANG Anning, born in 1980, female, doctorate student. E-mail： firstname.lastname@example.org.