CAJ | 학술논문

由于同塔双回输电线路电感较大，将面临更加严苛的防雷保护问题，所以为了降低输电线路的跳闸率，有必要对输电线路雷电反击的影响因素进行研究。采用ATP-EMTP建立了反击仿真模型，研究了不同雷电流幅值下的绝缘子两端的电压变化情况。利用规程法计算出不同冲击接地电阻、不同杆塔高度及不同波阻抗下的线路的耐雷水平和反击跳闸率。计算结果表明：降低接地电阻或杆塔高度可以有效地降低同塔双回输电线路反击跳闸率；当波阻抗独立地变化10％时，输电线路的反击跳闸率将相应地变化约20％。
유우동탑쌍회수전선로전감교대，장면림경가엄가적방뢰보호문제，소이위료강저수전선로적도갑솔，유필요대수전선로뇌전반격적영향인소진행연구。채용ATP-EMTP건립료반격방진모형，연구료불동뇌전류폭치하적절연자량단적전압변화정황。이용규정법계산출불동충격접지전조、불동간탑고도급불동파조항하적선로적내뢰수평화반격도갑솔。계산결과표명：강저접지전조혹간탑고도가이유효지강저동탑쌍회수전선로반격도갑솔；당파조항독입지변화10％시，수전선로적반격도갑솔장상응지변화약20％。
As the inductance of the double-circuit trans-mission line is very large, the line faces serious lightning-protection problems. In order to reduce the rate of transmission lines trips,it is necessary to study the influence factors of the lightening back-striking of the transmission line. This paper, using ATP-EMTP to establish the simulation model of the lightening back-striking,studies the changes of voltages at the Insulator 2 under different lightning current amplitudes. The paper calculates the lightening resistance level and lightning tripping probability of the transmission line under different impulse grounding resistances, different tower heights and different surge impedances. The calculation results show that reducing the earthing resistance or the height of the steel tower can effectively reduce the outrage rate of the double circuit transmission line,and when the wave impedance of the steel tower changes 10 percent independently,the back striking rate of the transmission line will change 20 percent accordingly.