摘要
变电站主变压器保护是重要保护,正常运行时其保护出口压板电压应可靠稳定,一旦出口压板电压偏差过大,当发生保护区内故障时,将可能引起主变压器保护出口拒动或误动,严重影响电网设备的安全稳定运行。本研究以某变电站主变保护出口压板电压异常为案例,分析了出口压板电压异常的原因,并在现场采取针对性方法消除了缺陷,最后提出了避免出口压板电压异常的防范措施。
Protection of main transformer in substation is an important relay protection. The outlet pressure plate voltage should be reliable and stable in normal operation. Once the voltage deviation of the outlet pressure plate is too large, the protection of the main transformer will refuse action or mismove as the occurrence of a fault in a protection zone, which seriously affects the safe and stable operation of the power grid equipment. In this study, the abnormal voltage of the outlet pressure plate of the main transformer in a substation is taken as a case. The reasons for the abnormal voltage of the outlet pressure plate are analyzed, and the defects are eliminated in the field. Finally, the preventive measures to avoid the abnormal voltage of the outlet pressure plate are put forward.
作者
尹柳
李煜亮
曹杰
陈辉宇
叶佳明
艾圣芳
YIN Liu;LI Yuliang;CAO Jie;CHEN Huiyu;YE Jiaming;AI Shengfang(State Grid Changsha Power Supply Company,Changsha 410015,China)
出处
《湖南电力》
2018年第5期39-41,共3页
Hunan Electric Power
关键词
主变压器保护
出口压板
电压异常
protection of main transformer
outlet pressure plate
abnormal voltage
