Research on the Effect of an Air-Blown Interrupting Gap to Reduce the Rate of Lightning Tripping

Hao Li (), Jufeng Wang, Ping Huang, Kezhu Guo and Yanlei Wang
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Hao Li: High Voltage Laboratory, Guangxi University, Nanning 530004, China
Jufeng Wang: High Voltage Laboratory, Guangxi University, Nanning 530004, China
Ping Huang: High Voltage Laboratory, Guangxi University, Nanning 530004, China
Kezhu Guo: State Grid Tacheng Power Supply Company, Tacheng 830000, China
Yanlei Wang: High Voltage Laboratory, Guangxi University, Nanning 530004, China

Energies, 2023, vol. 16, issue 3, 1-16

Abstract: The air-blown interrupting gap protection method is a self-energy interrupting method based on the concept of suppressing arc building by frequency continuation. In order to verify the effect of an air-blown interrupting gap to reduce the rate of line lightning tripping, in this paper, the protection principle of the air-blown interrupter gap is first described, and the action process simulated by COMSOL Multiphysics simulation software. Next, a frequency renewal test circuit is built for the test. Then, an arc-building rate calculation model and a lightning trip rate calculation model under the condition of an air-blown interrupting gap are established, and, finally, a 10 kV overhead line in Yunnan is selected for the verification of the calculation example. The results show the following: a gas blowing arc gap can be effectively extinguished in about 2.5 ms frequency arc and with no re-ignition phenomenon. Before and after the installation of the gas blowing arc gap line, the arc rate changed from 37.27% to 4.1%, respectively, and the lightning trip rate changed from 8.64 times/(40 thunderstorm days—100 km) to 0.337 times/(40 thunderstorm days—100 km), respectively. The decline rate was more than 95%, and in actual operation, it reduced the lightning trip rate enough to achieve good results.

Keywords: overhead transmission lines; air-blown arc extinguishing lightning protection gap; arc building rate; lightning strike trip rate (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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