Simulation analysis of the influence of multiple factors on lightning shielding characteristics between dense transmission lines

In order to solve the problem of mutual shielding of transmission lines between dense transmission channels, this paper proposes a calculation method based on the electrical geometric model method, which scans the entire model directly after modeling and obtains the ground projection of the exposed arc. On the basis of the modified and improved calculation method, this paper calculates the results of shielding tripping rate under the condition of parallel erection of two double-circuit lines under different terrains and analyzes its changing law. In order to show this rule more intuitively, this paper proposes the concept of shielding coefficient, which characterizes the shielding effect of adjacent lines on the shielding tripping rate of this line. Through the processing of the calculated data, this paper obtains the fitting formulas for different working conditions, and analyzes the qualitative law of its changes.