With the continuous construction of the power grid, a large number of power lines pass through forested areas. Electric sparks caused by power line faults may lead to forest fires, while forest fires can also cause power line failures. However, recording long-term waveforms of tree line faults and investigating the causes of forest fires are challenging in practice. To address this issue, we have chosen medium-voltage lines as the research focus and developed a simulation platform to simulate the interaction between power lines and trees. We have also established corresponding Simulink simulation circuits to compare measured data from the simulation platform with idealized conditions, allowing us to study the electrical parameter characteristics when power lines come into contact with trees. Additionally, we conducted experiments on distribution line faults under flame exposure and compared the observable traces on conductors between scenarios of contact with trees and exposure to flames. The findings of this research can serve as a reference for analyzing the combustion traces of steel-cored aluminum stranded wires in fire environments and identifying the causes of fires.