MHD Simulation of Tree-line Arc in 10kV Distribution Network

10kV overhead distribution lines are usually used for power supply in urban, rural and other areas. If the trees planted along the line are too close to the overhead line, the air between the tree and the conductor will break down, causing an arc. The high temperature of the arc will burn the wires and branches, and in some cases will cause the conductor wires to break and the trees to burn, thereby posing a serious safety threat. To analyze the characteristics of the arc caused by the tree-line contact, a magnetohydrodynamic model of the arc was established, and the effects of the tree-conductor separation speed and natural wind speed on the development of the arc were studied. The research results show that the separation of the branch and the blowing of wind will lead to an increase in the length of the arc and a decrease in temperature, which will affect the voltage and current waveform of the arc and the moment of flameout. The higher the separation speed and the wind speed, the faster the temperature decreases, and the shorter the duration of the arc.