Sensitivity Analysis on Grounding Models for 500kV Transmission Lines

Abstract

In order to calculate lightning surge analysis in power systems, appropriate models and parameters describing the components of systems should be required. Moreover, it is necessary to clarify how much those models would influence result of simulation. In other words, it is important to confirm how much probability of back flashover accidents would occur in changing grounding model or its input parameter. This paper will examine to compare some models for components in transmission tower and will show influence to the back flashover result, especially focusing on grounding impedance model.