The Study On Parameters Measurement Of Transmission Line

Transmission line is an important part of power system, the parameters of the accuracy and reliability related to the power system security, stability, and reliable operation. Therefore, the measuring work of transmission line parameters has the very significant significance.After the completion of the line and before putting into operation, we measure the parameters of transmission line for power flow calculation, relay coordination and selection of power system operation, etc., and these parameters will not change over a period of time. With the growth of time for operation of transmission line, the aging of wire, changes of climate and other factors may result in changes of parameters of transmission line. Therefore, after the transmission line put into operation, we also need to measure the parameters of transmission line regularly.This paper analyzes the status and the development trend of parameters measurement of transmission line. At first we take the in-depth analysis and the arguments of domestic and abroad parameters measuring methods of transmission line, then we take into account electromagnetic coupling between the current widely deployed multi-circuit parallel transmission lines, at last we established a mathematical model of measurement of multi-loop parameters based on the measurement of the parameters of coupled transmission line. And we use the MATLAB simulation software for modeling, programming and simulation. We analysis of the simulation results of the calculation and we find this method is accurate and so on.