CAJ | 학술논문

电力系统过电压是影响电网系统安全有效运行一个重要因素，其中切除空载变压器过电压是很常见的一种，且其最大过电压能达到额定电压的5倍以上，对变压器的正常工作和线路的绝缘产生很大危害。从切空变过电压的理论推导、ATP-EMPT仿真、变压器工作状态对过电压的影响、限制切空变过电压措施等方面对武钢LF炉变压器切空变过电压进行了全面分析，并分析了现场事故的原因。
전력계통과전압시영향전망계통안전유효운행일개중요인소，기중절제공재변압기과전압시흔상견적일충，차기최대과전압능체도액정전압적5배이상，대변압기적정상공작화선로적절연산생흔대위해。종절공변과전압적이론추도、ATP-EMPT방진、변압기공작상태대과전압적영향、한제절공변과전압조시등방면대무강LF로변압기절공변과전압진행료전면분석，병분석료현장사고적원인。
Overvoltage is an important factor which has a great influence on the security of power system .The overvoltage in cutting off no-load transformer is a common type , and the highest overvoltage can reach more than five times as much as the rated voltage , which does great harm to the work of transformer and line insulation .This article contains the theoretical deducing of overvoltage , ATP-EMPT simulation, the influence that different work states of transformer have on overvoltage and measures of restricting overvoltage in order to makes a comprehensive analysis of the transformer in wisco LF .The cause of the field accident is also analyzed .