电工技术学报2018，Vol.33Issue(3)：573-580,8.DOI:10.19595/j.cnki.1000-6753.tces.161854
同塔双回直流输电线路行波时域计算方法
A Time-Domain Calculation Method of Travelling-Wave on Double-Circuit HVDC Transmission Line with Shared Towers
摘要
Abstract
The double-circuit transmission line with shared towers is not balanced.Thus the frequency-dependent characteristic of traveling wave propagation,refraction and reflection are the key issue of its travelling-wave calculation.A time-domain calculation method of travelling-wave on double-circuit HVDC transmission line is proposed.Based on the vector fitting method and superposition theorem,the characteristics of refiaction and reflection of fault generated travelling wave at the end of DC line are equivalent to the matrix of sequential wave impedance.Meanwhile,a time-domain step response matrix is used to calculate the frequency-dependent characteristics in the propagation process of travelling wave,which would avoid the complicated time-frequency conversion.Finally the PSCAD/EMTDC simulation model of a real double-circuit HVDC transmission lines with shared towers was constructed and extensive simulation results verify the validity and accuracy of the proposed method.关键词
行波计算/频变特性/同塔双回直流线路/矢量拟合法Key words
Travelling wave calculation/frequency-dependent characteristics/double-circuit HVDC transmission line with shared towers/vector fitting分类
信息技术与安全科学引用本文复制引用
李海锋,武霁阳,梁远升,张坤,王钢..同塔双回直流输电线路行波时域计算方法[J].电工技术学报,2018,33(3):573-580,8.基金项目
国家自然科学基金项目(51577072)和直流输电设备状态评估与故障诊断实验室开放基金项目资助. （51577072）
