500kV线路保护升级改造安全防范措施  

The security precautions in the 500 kV transmission line protection upgrading and replacing

作　　者：姚莉娜[1] 刘华[2] 张斌[2] 周亚辉[2] 贾炜[2] 张新旺[2] 张强[2] 

机构地区：[1]郑州轻工业学院,河南郑州450002 [2]河南送变电建设公司,河南郑州450051

出　　处：《电力系统保护与控制》2010年第22期220-223,226,共5页Power System Protection and Control

摘　　要：500kV超高压电网保护配置复杂,进行线路保护升级改造和更换涉及多个运行设备和相应的二次线。结合近几年500kV线路保护升级改造和更换的经验,分析了其中存在的各种危险点,制定了封贴运行端子排、退出保护压板、断开直流屏保护装置电源等安全防护措施,防止了改造中直流接地、短路、误启动失灵回路跳运行线路、主变或母线的发生,保证了500kV线路保护升级改造工作的顺利进行,收到了良好的效果,对今后进行类似的工作具有重要的指导意义。The protective devices of the 500 kV EHV grid are yery complex. The upgrading and changing of line protection involve many running equipments and the corresponding secondary lines. Based on the experience of the 500 kV line protection upgrading and changing in the past few years, the danger in it is analyzed. The security precautions of sealing running terminal block, exiting protection board, disconnecting the power of protection device in the DC screen, etc, are made. The DC ground, short circuit and false startup failure protection jumping running lines, transformer and bus are avoided. The upgrading and changing of 500 kV line protection are ensured to go well. The discussion is of important significance for the future similar work.

关 键 词：500 kV超高压电网 3/2接线 线路保护 升级改造 二次线 

分 类 号：TM773[电气工程—电力系统及自动化]