110 kV固相灭弧防雷装置灭弧效果的研究

新型固相灭弧防雷装置能降低输电线路雷害事故,提高供电可靠性,为进一步验证其性能,文中对装置的作用机理和效果进行研究。介绍了装置的工作原理,通过电弧模型仿真和冲击气流灭弧仿真得出电弧电流在第一次过零点时被截断,理想环境下,高速冲击气流可在1.4 ms左右将电弧熄灭,且不重燃。灭弧试验表明,装置在极短的时间内熄灭电弧,保护绝缘子,避免继电保护动作,降低雷击跳闸率。冲击气流灭弧防雷装置的有效性和实用性得到验证。

Research of Arc-extinguishing Effect of 110 kV Fixed Phase Arc-extinguishing Lightning Protection Device

New fixed phase arc-extinguishing lightning protection device can reduce lightning accident of the transmission line andimprove the reliability of power supply. In order to further verify its performance, we study the mechanism of action and effect of the device. This paper introduces its operating principle, through arc model simulation and arc-extinguishing simulation, we get that the arc can be cut off at the first zero crossing;in the ideal environment, arc can be extinguished within about 1.4 ms under the effect of the high-speed impact airflow without re-ignition. The arc-extinguishing tests indicate that the device can protect insulator strings, avoid action of relay protection and reduce the rate of the lightning trip-out of transmission line in a very short period of time. Then effectiveness and practicability is proved.