摘要
文中分析某220 kV变电站近区110 kV电缆终端运行中击穿接地故障和变电站3条220 kV出线跳闸事故,指出电缆终端应力锥在安装过程中损伤了主绝缘,绝缘材料在长期局部放电作用下发生劣化是发生击穿的原因。电缆故障后,因蓄电池组存在开路导致直流Ⅰ段母线失压,从而导致线路跳闸。最后针对跳闸原因提出了解决措施和建议。
The paper analyzes an 110 kV cable terminal breakdown grounding fault near a 220 kV substation , and trip fault of three outgoing transmission lines of 220 kV substation , point out that the main insulation of the cable is damaged by the installing of the able terminal stress cone using the disintegration check and the insulating materials deteriorates caused by the partial discharge , and after the cable failure, the DC section I bus voltage failure caused by the battery group open circuit results in transmission lines trip . Finally the paper puts forward the counter measure and suggestion .
出处
《湖南电力》
2016年第5期61-64,共4页
Hunan Electric Power
关键词
近区
击穿
故障
保护动作
跳闸
分析
near field
breakdown
failure
protection action
trip
analysis
