摘要
针对某550kV GIS系统,利用EMTP计算不同的开关操作方式对VFTO的影响,计算结果表明分闸操作比合闸操作的过电压情况更严重,且各方式下VFTO幅值基本在操作开关附近最大,另外,主变上的过电压值较小,不超过1.3p.u,对主绝缘影响不大,但因累积效应,危害也很大。
This essay discusses about the influence of different ways of tripping and reclosing on VFTO in a 550 kV GIS system by means of EMTP.According to the results,the situation of overvoltage is more serious in tripping than in reclosing.The amplitude of VFTO is maximum near the console switch.The amplitude of overvoltage on the main transformer is less than 1.3 p.u,which has weaker influence on the major insulation.However,the cumulation of it may cause great harm.
出处
《重庆电力高等专科学校学报》
2010年第3期21-24,共4页
Journal of Chongqing Electric Power College
