Calibration of excitation function measurement based on corona cage test results

Corona cage approaches are crucial for research on thecorona characteristics ofconductors.Calibration is an indispensable task for determining excitation functions, which are used to predictcorona performance of long transmission lines through extrapolation from measurements of short lines incorona cages. In this paper, the amplification factor G is calculated through a frequently adopted method, propagation analysis of high-frequencycoronacurrent along a short line. Another convenientcalibration method, based on distributed parameter equivalent circuits, is established. The results for G obtained through propagation analysis and equivalent circuits are compared. To verify the rationality of calculation parameters in propagation analysis and equivalent circuits, acalibration experiment based on the excitation caused by a simulated monopulsecurrent was performed. The results of the proposedcalibration method and thecalibration experiment are in good agreement.

Source: Review of Scientific Instruments - November 11, 2016 Category: Physics Authors: Lei Lan, Xiaoyue Chen, Xishan Wen, Wei Li and Guozhou Xiao Source Type: research