The Preliminary Research For Application Of The GAS-Driven Arc Extinction For Under Power System With Serious Ice Condition

With the development of power industry and growth of people’s demand for electricity, the power system scale is also growing, which objectively increases chances for external natural hazards which affected power system greatly. Especially low temperature and freezing rain climate occurred frequently in the South of China, causing a great harm to power system after the transmission lines, towers and other equipment were covered with ice. And the traditional ground wires breaks caused by heavy ice then harm the normal operation of transmission lines is an important type of icing accidents, which caused the contradiction between the lightning protection and anti-icing.In this paper we consider use lightning protection device with the gas-driven arc extinction to replace the traditional devices such as lightning lines, so as to ensure low lightning accident rate and also reduce icing hazards, obtaining win-win results. This paper investigated related performance of this new device through plenty of experiments, particularly measured the time for arc extinction. The results show that it can conduct the lighting current and rapidly extinguish the arc under lightning attack, protecting the equipment. So it can replace the traditional ground wires under the icing condition; in addition, the copper wires were used to simulate the icicle, and a number of experiments were carried out to investigate the discharge path and discharge voltage of iced-covered FXBW- 110/100-134 composite insulators, these data can provide help for application of parallel gap to protect iced insulators.