Experimental Study on a Compressed Arc Extinguishing Device for Power Distribution Network

Abstract

A compressed arc extinguishing device for power distribution network is developed to solve the problem of existing anti‐lightning of power distribution network transmission lines. This paper first introduces the arc extinguishing principle of the arc extinguishing device, and then designs the lightning impulse voltage test around the 10 kV transmission line. The test results show that the U50% Lightning impulse voltage of the arc extinguishing device is 112.4 kV considering the atmospheric correction factor. In order to verify the feasibility of the arc extinguishing device, the power frequency continuous current interruption test is designed. The test shows that the arc extinguishing device can extinguish the arc with a peak value of 1.131 kA in 2 ms and does not reignite in the following time. Finally, the device is applied to a 10 kV power distribution network transmission line of China Southern Power Grid. The lightning trip‐out rate of the transmission line per 100 km is reduced from 12.5 (times/year) to 1.1 (times/year), which fully verifies the feasibility of the arc extinguishing device. © 2021 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

A Comparative Study of Power Frequency Arcs Influenced by Negative-Polarity Artificial Pulses

“…When triggered by a lightning impulse arc, they release an extinguishing gas to quench the PFA, so the reliability of the power supply is improved. Previous work [5], [10] has shown that AEDs can accelerate arc cooling, enhance convection heat dissipation power, and improve arc extinguishing efficiency, finally resulting in arcextinguishing and the rekindling of the inhibition. When lightning strikes a transmission tower, the lightning impulse arc travels to the AED entrance due to the EP difference with an arc guide plate (copper layer), so that the PFA travels along the discharging path established in advance by the lightning impulse arc.…”