降低变电所低压侧母线故障对主变损害的继电保护措施  

Measures of protection relay on reducing the damage of main transformer caused by medium-voltage and low- voltage busbar fault

作　　者：吴宏斌[1] 陈国平[1] 

机构地区：[1]金华电业局,浙江金华321000

出　　处：《电力系统保护与控制》2009年第21期119-121,共3页Power System Protection and Control

摘　　要：母线故障不仅严重危害系统的安全稳定运行,而且会导致与其相邻的变压器内部绕组、铁心等元器件严重受损。考虑到一般情况下110kV及以下变电所内不安装母线保护,同时为保证选择性,主变后备保护动作时间较长,为消除变电所低压侧母线发生故障给主变带来的危害,提出了一些解决方案,并在相互比较中判断其优劣,以供选择和应用。Busbar faults not only make the power system work unsmoothly, but also severely damage electrical windings and cores inside the transformers. In ordinary circumstances, protection equipments for busbar are not to be installed in 110kV and below 110kV transformer substations. Meanwhile, for the sake of ensuring the selections, the actuation time of the main transformer back-up relaying lasts long. The paper puts forward some schemes in order to remove the danger caused by medium-voltage and low- voltage busbar fault. Forthermore, the paper analyses and assesses these schemes for selection and application.

关 键 词：母线故障 主变损害 保护措施 

分 类 号：TM772[电气工程—电力系统及自动化]