三回非全线平行线路零序分布参数测量方法  

Zero Sequence Parameters Measurement of Triple-circuit Non-full-line Parallel Transmission Lines

作　　者：高明鑫 胡志坚[1] 倪识远 刘妍[1] GAO Mingxin;HU Zhijian;NI Shiyuan;LIU Yan(School of Electrical Engineering and Automation,Wuhan University,Wuhan 430072,Hubei Province,China;Institute of Economic and Technology,State Grid Fujian Electric Power Co.,Ltd.,Fuzhou 350012,Fujian Province,China)

机构地区：[1]武汉大学电气与自动化学院,湖北省武汉市430072 [2]国网福建省电力有限公司经济技术研究院,福建省福州市350012

出　　处：《电网技术》2022年第4期1539-1547,共9页Power System Technology

基　　金：国家自然科学基金项目(51977156)。

摘　　要：随着电网的不断发展,输电走廊日益狭窄,三回线路共用一部分走廊的情况非常普遍,目前未有相应的线路分布参数测量方法。建立了三回非全线平行线路分布参数模型,考虑到线路参数的非均匀性,提出了一种三回非全线平行线路零序参数精确测量方法。该方法利用拉普拉斯变换完整地得到线路的传输矩阵,配合同步测量技术,在4种独立测量方式下同步测量线路首末端的电压与电流,并代入所提方法,可解出高精度的零序参数。利用PSCAD/EMTDC软件验证了该方法的准确性,并与现有测量方法进行对比。仿真结果表明,该方法较现有测量方法具有更高的测量精度。With the continuous development of power grids,the transmission corridors are increasingly narrowing,and it is very common for the triple circuits to share a part of the corridor.Currently,there is no corresponding line distribution parameter measurement method.This paper establishes a triple-circuit non-full-line parallel line distributed parameter model.Considering the non-uniformity of line parameters,an accurate measurement of the zero sequence parameters of triple-circuit non-full-line parallel lines is proposed.This method uses the Laplace transform to completely obtain the transmission matrix of the lines.With the synchronous measurement technology,the voltages and currents at the heads and ends of the lines are measured synchronously under 4 independent measurement modes.These voltages and currents are substituted to the proposed method to solve the zero sequence distribution parameters accurately.The accuracy of the proposed method is verified by the PSCAD/EMTDC simulation software.Compared with the existing measurement methods,the proposed method has higher measurement accuracy than the existing methods.

关 键 词：三回非全线平行输电线路 非均匀传输线 拉普拉斯变换 线路传输矩阵 同步测量 

分 类 号：TM721[电气工程—电力系统及自动化]