Title :
New methods and realization of live line measurement of zero sequence parameters of transmission lines with mutual inductance
Author :
Zhijian, Hu ; Yunping, Chen ; Feng, Zhan ; Xiaoqin, Gong
Author_Institution :
Sch. of Electr. Eng., Wuhan Univ.
fDate :
Nov. 29 2005-Dec. 2 2005
Abstract :
Based on GPS technology and differential equations, two new methods of live line measurement of the parameters of transmission lines with mutual inductance are proposed. The principles and mathematical models of the steady differential method and the transient differential method are explained in details. Data processing algorithm by least square method is introduced in the measurement. The hardware structure of the measuring system and digital simulation results are given. Finally, an example of live line measuring 500 kV transmission lines with mutual inductances in Northeast China power network is given. Comparison of results among the steady differential method, the transient differential equation method and the conventional method is also shown. The field measurement results prove that the new methods can meet the needs of live line parameter measurement of transmission lines
Keywords :
Global Positioning System; differential equations; inductance; least squares approximations; transmission line theory; 500 kV; GPS technology; Northeast China power network; data processing algorithm; differential equations; least square method; live line measurement; mutual inductance; steady differential method; transient differential method; transmission lines; zero sequence parameters; Data processing; Differential equations; Global Positioning System; Hardware; Inductance measurement; Least squares methods; Mathematical model; Power system transients; Power transmission lines; Transmission line measurements; Differential equations; GPS; Least square method; Live line measurement; Power system; Transmission lines; Zero sequence parameters;
Conference_Titel :
Power Engineering Conference, 2005. IPEC 2005. The 7th International
Conference_Location :
Singapore
Print_ISBN :
981-05-5702-7
DOI :
10.1109/IPEC.2005.206869
