CAJ | 학술논문

输电线路绝缘子串并联保护间隙受雷击闪络后无法主动快速地熄灭后续工频电弧，不能有效地阻止雷击跳闸。研究了一种主动式、快速地爆轰气流灭弧装置，装置安装于并联间隙电极之间，当雷击并联间隙形成工频电弧时，装置受到雷电流信号触发同步产生爆轰气流，能够以远小于继保装置的最快响应时间熄灭后续工频电弧，从而避免继保装置动作，有效地阻止雷击跳闸。建立了爆轰气流灭弧的数值模型，通过仿真分析得到近似理想状态下的爆轰气流灭弧时间为0.08 ms以内；灭弧实验证明爆轰气流在0.4 ms以内熄灭电弧，两者得到的灭弧时间均远小于继保装置的最快响应时间，其误差在可接受范围内，由此验证了爆轰气流灭弧的有效性和可靠性。
수전선로절연자천병련보호간극수뢰격섬락후무법주동쾌속지식멸후속공빈전호，불능유효지조지뢰격도갑。연구료일충주동식、쾌속지폭굉기류멸호장치，장치안장우병련간극전겁지간，당뢰격병련간극형성공빈전호시，장치수도뇌전류신호촉발동보산생폭굉기류，능구이원소우계보장치적최쾌향응시간식멸후속공빈전호，종이피면계보장치동작，유효지조지뢰격도갑。건립료폭굉기류멸호적수치모형，통과방진분석득도근사이상상태하적폭굉기류멸호시간위0.08 ms이내；멸호실험증명폭굉기류재0.4 ms이내식멸전호，량자득도적멸호시간균원소우계보장치적최쾌향응시간，기오차재가접수범위내，유차험증료폭굉기류멸호적유효성화가고성。
Since the follow-up power frequency arc cannot be effectively extinguished after the occurrence of lightning flashover in the parallel protection gap for insulator string of transmission line, the lightning trip-out of transmission line cannot be prevented. An active and fast detonation airflow arc-extinguishing device is developed, that is, when power frequency arc is formed within the protection gap due to the lightning strike on it, the lightning current immediately ignites the arc-extinguishing device and the detonation airflow is synchronously produced, so the follow-up power frequency arc can be extinguished within a very short arc duration that is much shorter than the fastest response time of relay protection, thus the action of relay protection can be avoided and the lightning trip-out of transmission line can be effectively prevented. A numerical model of arc extinguishing by detonation airflow is established, and it is obtained from the simulation results that the arc extinguishing time by detonation airflow under approximate ideal condition is shorter than 0.08ms;it is proved by arc extinguishing experiments that the detonation airflow can distinguish the arc within 0.04ms, and both above-mentioned arc distinguishing times are much shorter than the response time of relay protection, besides, the errors are in the acceptable range, thus the effectiveness and reliability of the proposed detonation airflow arc distinguishing method are validated.