CAJ | 학술논문

为获得我国青藏高海拔地区220 kV换流站设计依据,结合我国青藏高海拔±500 kV直流工程,在4000m左右高海拔地区,开展220 kV换流站真型构架典型电极以及棒-板操作冲击、雷电冲击试验研究.利用升降法在2.5～4.O m间隙距离内给出换流站交流侧典型电极操作、雷电冲击放电特性曲线.讨论不同海拔高度下操作冲击和雷电冲击放电电压的校正方法,并给出海拔或大气校正因数.通过分析试验数据,推荐换流站交流侧软母线对构架最小空气间隙的选择方法.研究结果表明,在相同的间隙距离下,棒-板间隙的冲击放电电压较典型电极低,同时,在4000 m海拔高度下,雷电过电压成为控制换流站构架尺寸的主导因素.
위획득아국청장고해발지구220 kV환류참설계의거,결합아국청장고해발±500 kV직류공정,재4000m좌우고해발지구,개전220 kV환류참진형구가전형전겁이급봉-판조작충격、뇌전충격시험연구.이용승강법재2.5～4.O m간극거리내급출환류참교류측전형전겁조작、뇌전충격방전특성곡선.토론불동해발고도하조작충격화뇌전충격방전전압적교정방법,병급출해발혹대기교정인수.통과분석시험수거,추천환류참교류측연모선대구가최소공기간극적선택방법.연구결과표명,재상동적간극거리하,봉-판간극적충격방전전압교전형전겁저,동시,재4000 m해발고도하,뇌전과전압성위공제환류참구가척촌적주도인소.
In accordance with the project of ±500 kV DC of Qing-Tibet Plateau, at the altitude approximately 4000 m, the real tower test of the typical electrode of 220 kV converter station and rod-plane air gap under switching impulse, lightning impulse were experimentally researched. The switching and lightning impulse flashover characteristic of air gap between 2.5 m and 4.0 m were analyzed. The correction method of switching and lightning impulse flashover voltage under high altitude was discussed, and the altitude or weather correction coefficient was given.The proper way of determining the least air gap of the electrode to the tower was also recommended. The test results indicate that flashover voltage of rod-plane air gap is lower than that of the typical'electrode at the same distance, and the lightning impulse voltage becomes the leading factor for controlling the dimensions of the tower of converter station at the altitude of 4000 m areas.