New Computational Method for Study of Ionic Current Environment of HVDC Transmission Lines

Abstract

The divergence of corona generated ionic currents under the HVDC transmission lines to any living organism is vulnerable. The flow of these corona-generated ionic currents under the transmission lines at extended voltage levels such as HV to EHV/UHV levels may raises in exponential manner results in extreme hazardous presents in the surrounding of transmission lines. This shows that the estimation of precise values of the corona generated ionic currents is much needed to existing and new constructing HVDC lines from HV to EHV/UHV voltage levels. Therefore, the complete analysis of the ionic current environment under the transmission lines is vital before design consideration. This paper presents the new computational method to analyze and estimate the corona-generated ionic currents under the HVDC transmission lines using the modeling of the physics of the corona phenomenon. Also, this paper presents a reduced scale down experimental results to validate the proposed computational method. The proposed method estimates the ionic current environment under the transmission lines with consideration of atmospheric parameters such as temperature and pressure to obtain the equivalent measured results. The computation results are matched very closely to the experimental measurements.