一起500kV输电线路冰害故障跳闸分析  

Analysis of a 500 kV Transmission Line Ice Damage Fault Trip

作　　者：傅利成 邢旭亮 周刚 周咏槟 李传才 赵晓莉 吴媖 FU Licheng;XING Xuliang;ZHOU Gang;ZHOU Yongbin;LI Chuancai;ZHAO Xiaoli;WU Ying(State Grid Zhejiang Electric Power Co.,Ltd.Jiaxing Power Supply Company,Zhejiang Jiaxing 314000,China)

机构地区：[1]国网浙江省电力有限公司嘉兴供电公司,浙江嘉兴314000

出　　处：《农村电气化》2024年第8期50-52,共3页Rural Electrification

摘　　要：分析了一起500 kV线路冰害故障跳闸事件。寒潮导致温度急剧下降,雨雪冰冻使线路快速结冰;随后受暖湿气流影响,短时间内温度快速回升,出现不均匀脱冰跳跃导致相间安全距离不足,引起相间故障。检修人员巡检消缺后,通过线路抗冰改造、加强极端天气预警、提高应急抢修能力等措施,降低极端天气对运行线路的影响,提高运行线路的安全水平。An ice damage fault trip event of 500 kV line is analyzed.The cold wave causes the temperature to drop sharply,and the rain and snow freezing causes the line to freeze rapidly;Then,affected by the warm and humid air flow,the temperature rose rapidly in a short time,and the uneven de-icing and jumping of the conductor led to the insufficient safety distance between phases,resulting in the interphase fault.After patrol inspection and defect elimination,the maintenance personnel will reduce the impact of extreme weather on the operation line and improve the safety level of the operation line through measures such as anti-ice transformation of the line,strengthening the extreme weather warning,and improving the emergency repair ability.

关 键 词：输电线路 脱冰跳跃 除冰 故障分析 

分 类 号：TM727[电气工程—电力系统及自动化]