UAS Safe Distance due to Magnetic Field of Extra High Voltage Transmission Lines during a Phase-to-Phase Short Circuit

Electric and Magnetic Fields Analysis of the Safety Distance for UAV Inspection around Extra-High Voltage Transmission Lines

“…To model the transient magnetic field, an external circuit was created to simulate the current flow through the transmission lines during a phase-to-phase fault scenario. Figure 15a-c In this study, a 0.1 s simulation had the fault starting at 0.96 s and ending at 1.06 s [11]. Figure 16 In this study, a 0.1 s simulation had the fault starting at 0.96 s and ending at 1.06 s [11].…”

“…where n is the number of sub-conductors, r is the radius of the sub-conductor, and A is the bundle radius. The influence of the dimensions of a conductor, mainly when dealing with multiple conductors, can be assessed by using the equivalent conductor diameter provided by Equation (11). Essentially, this diameter is that of a hypothetical single conductor, which would carry the same amount of electric charge per unit length as the bundle, resulting in a comparable electric field.…”

“…Figure 15a-c In this study, a 0.1 s simulation had the fault starting at 0.96 s and ending at 1.06 s [11]. Figure 16 In this study, a 0.1 s simulation had the fault starting at 0.96 s and ending at 1.06 s [11]. Figure 16 shows the short-circuit bridge currents and voltages for 345 kV, 500 kV, and 765 kV transmission lines during the 0.1 s transient period.…”

“…This paper, an extended work of [10,11], describes the design and development of a robust simulation environment for assessing safe distances during UAV inspections of extra-high voltage (EHV) transmission lines under both normal and transient operating conditions. The simulation environment accounts for various UAV operational conditions and power line configurations.…”