强不对称互感输电线路序阻抗参数理论分析与计算  

Theory Analysis and Calculation of Sequence Impedance Parameters of Strong Unsymmetry Transmission Line with Mutual Inductance

作　　者：黄卫菊 武利会[2] 唐诚[3] 

机构地区：[1]佛山电力设计院有限公司,广东佛山528000 [2]中国南方电网广东电网公司佛山局,广东佛山528000 [3]武汉大学电气工程学院,武汉430072

出　　处：《广西电力》2011年第5期1-6,26,共7页Guangxi Electric Power

基　　金：国家自然科学基金项目(50477018)

摘　　要：通常考虑输电线路参数的时候认为正、负序互感是可以忽略的。但实际情况中存在强不对称的单回线路和强电耦合的双回同塔线路,这种线路的正、负序之间的耦合能否忽视及其影响大小却少见研究。针对实际线路情况,回顾了输电线路序阻抗理论,建立了输电线路一般的数学模型,推导了更加切合实际的计算公式,给出了线路序电流不平衡度的定义,最后2个实例应用表明:强不对称的互感线路其各序耦合是不可忽略的,应给与充分的考虑。Because the compact double transmission lines on the same tower is hard to exchange phases, and the configuration of conductors and lightning shield conductors has great influence on three phases＇ charge balance, so the optimization of conductor configuration is necessary. Based on the ca｜culation of charge and system partial capacity of each conductor by surface charge density method, all conductors＇ position coordinates were treated as variables and were optimized to the basic balance of three phases＇ charge. The calculation result shows that the partial capacity, the max capacity of per phase and the charge distribution after optimization are more equal than before.

关 键 词：输电线路互感 电磁耦合 电流不平衡度 负序 零序 

分 类 号：TM134[电气工程—电工理论与新技术] TM751