淮南-上海特高压工程电气不平衡度及换位方式仿真计算  

Huainan-Shanghai UHV Electric Imbalance and Transposition Mode Simulation

作　　者：祝贺[1] 李炳坤[1] 

机构地区：[1]东北电力大学建筑工程学院,吉林吉林132012

出　　处：《东北电力大学学报》2017年第4期45-51,共7页Journal of Northeast Electric Power University

摘　　要：以建设我国第一条同塔双回1 000 k V输电线路(皖电东送淮南~上海)工程为例,研究探讨了输电线路不同换位方式,分析了输电线路不平衡度的影响因素;结合该条线路的工程实例,同时利用理论计算结果和EMTP-ATP(电力系统仿真软件)建立该条特高压线路的同塔双回输电线路模型,分析了该条线路换位之后的不平衡度,且研究了在六种相序排列下特高压同塔双回线路对不平衡度的影响关系,仿真结果表明:当进行一次全换位后,此时线路的不平衡度显著下降,范围为20倍~30倍;当输电线路长度增大,线路的不平衡度随之增加;同时线路的不平衡度与导线相序排列方式密切相关,对线路的不平衡度影响由大至小依次为同相序、逆相序、异名相序。最后根据特高压线路换位方式,进行线路换位方式的技术经济分析,并且给出了适宜的换位长度。Taking the construction of China＇ s first （ to East Anhui Huainan - Shanghai Electric） tower double -circuit transmission line project 1000kV as an example, the study investigated the line conductor transposition manner, analyze the impact line imbalance a variety of factors ; engineering examples section line, while the use of theoretical calculations and EMTP-ATP （power system simulation software） to establish which of UHV transmission line tower double-circuit transmission line model, and which are not in line unbalance and unbal- ance when transposition transposition after a comparative analysis, the effects of phase sequence and arrange- ment of line length tower double circuit transmission lines on which transmission line imbalance, the simulation results show, after a full transposition, unbalance the line is significantly reduced, can be reduced by about 20 to 30 times;When the length of the transmission line increases, line unbalance increases;at the same time line unbalance and phase arrangement of the lines is closely related to the effect of unbalanced line from big to small in the same sequence, reverse phase sequence, phase sequence. Finally, according to UHV transposed way, technical and economic analysis of line transposition methods, and gives proper transposition length.

关 键 词：特高压 输电线路 不平衡度 换位长度 

分 类 号：TM08[电气工程—电工理论与新技术]