摘要
随着电力系统的不断发展,输电走廊日益狭窄,四回线路共用一部分走廊的情况非常普遍,目前尚未有相应的线路分布参数测量方法。该文提出一种四回非全线平行线路分布参数精确测量方法,建立四回非全线平行线路的非均匀传输线模型,通过拉普拉斯变换完整地得到四回线路的传输矩阵,获得线路分布参数与线路两端的电压、电流之间关系的数学表达式。在四种独立测量方式下同步测量四回非全线平行线路首末两端的零序电压与零序电流,代入该文所提计算公式,精确求解出24个零序分布参数。通过PSCAD仿真软件证明了该文方法的准确性,并与现有测量方法进行了比较。仿真结果表明,该文方法较现有测量方法具有更高的测量精度。
With the development of power systems,the transmission corridors are becoming narrower,and it is very common for quadruple-circuit lines to share a part of the corridor.There is no corresponding line distributed parameter measurement method.This paper proposes an accurate measurement method for the distribution parameters of quadruple-circuit non-full-line parallel lines,establishes a non-uniform transmission line model of quadruple-circuit non-full-line parallel lines,and obtains the transmission matrix of the quadruple-circuit lines completely through Laplace transform.In addition,the mathematical expressions between the line parameters and the voltages,currents of the heads and ends of the lines are obtained.The zero-sequence voltages and currents of the first end and last end of the quadruple-circuit non-full-line parallel lines are simultaneously measured under four independent measurement modes,and are substituted into the proposed calculation formulae to solve 24 zero-sequence distributed parameters.The accuracy of the proposed method is verified by PSCAD simulation software.Compared with the existing measurement methods,the simulation results show that the proposed method has higher measurement accuracy than the existing methods.
作者
高明鑫
胡志坚
倪识远
张志毅
牟洪江
Gao Mingxin;Hu Zhijian;Ni Shiyuan;Zhang Zhiyi;Mou Hongjiang(School of Electrical Engineering and Automation Wuhan University,Wuhan 430072 China;Institute of Economic and Technology State Grid Fujian Electric Power Co.Ltd,Fuzhou 350012 China)
出处
《电工技术学报》
EI
CSCD
北大核心
2022年第6期1351-1364,共14页
Transactions of China Electrotechnical Society
基金
国家自然科学基金资助项目(51977156)。
关键词
四回非全线平行线路
非均匀传输线
零序分布参数
拉普拉斯变换
同步测量
Quadruple-circuit non-full parallel lines
non-uniform transmission lines
zero sequence distributed parameters
Laplace transform
simultaneous measurement
作者简介
高明鑫,男,1997年生,硕士研究生,研究方向为输配电线路参数测量。E-mail:mingxin_gao@whu.edu.cn;通信作者:胡志坚,男,1969年生,博士,教授,博士生导师,研究方向为电力系统稳定分析与控制、输电线路参数带电测量等。E-mail:zhijian_hu@163.com。
