新型同塔双回高压直流输电线路分布参数测量方法及工程应用  

Measuring of distributed parameter and its application for dual-loop HVDC transmission lines on same tower

作　　者：邓军[1,2] 肖遥[2] 郝艳捧[1] 

机构地区：[1]华南理工大学电力学院,广东广州510640 [2]中国南方电网超高压输电公司检修试验中心,广东广州510663

出　　处：《电力自动化设备》2016年第3期154-158,174,共6页Electric Power Automation Equipment

摘　　要：为提高同塔双回高压直流输电线路分布参数的测量精度,建立了同塔双回高压直流线路分布参数的物理模型。对同塔双回直流线路进行不同方式的组合,推导了各组合方式下求解线路分布参数的数学方程组。将所提方法应用于牛寨至广东高压直流同塔双回输电工程中,结果表明:牛寨至广东高压直流同塔双回输电线路单根导线的自感、对地电容都分别小于线路间耦合电感和耦合电容,线间耦合电容基本相等;牛寨换流站及从西换流站接地极同塔双回线路单根导线的自感大于线路间互感,单根导线的对地电容小于线间的耦合电容。In order to improve the measurement accuracy of distributed parameters for the dual-loop HVDC transmission lines on same tower,a physical distributed parameter model is established and different com-binations of the dual-loop HVDC transmission lines on same tower are set to deduce the corresponding mathematical equations for calculating the distributed parameters,which is applied in Niuzhai-Guangdong HVDC project and the results show that,for the dual-loop HVDC transmission lines on same tower from Niuzhai to Guangdong,the single-conductor self-inductance and grounding capacitance are lower than the inter-line coupling inductance and capacitance respectively,and the inter-line coupling capacitances are basically same;for the dual-loop transmission lines on same tower of the grounding polar of Niuzhai con-verter station or Congxi converter station,the single-conductor self-inductance is greater than the inter-line coupling inductance and the single-conductor grounding capacitance is lower than the inter-line coupling capacitance.

关 键 词：高压直流输电 分布参数 耦合参数 开路阻抗 短路阻抗 正序 零序 测量 

分 类 号：TM721.1[电气工程—电力系统及自动化]