10 kV补偿电容器电压不平衡导致保护跳闸的原因分析  

Cause Analysis of Protection Tripping Due to Unbalanced Voltage of 10 kV Compensation Capacitor

作　　者：任金鹏 陶志良 REN Jinpeng;TAO Zhiliang(Handan Steel Hanbao Energy Center of Hebei Iron and Steel Group,Handan,Hebei 056003,China)

机构地区：[1]河钢集团邯钢公司邯宝能源中心,河北邯郸056003

出　　处：《冶金动力》2023年第1期12-13,39,共3页Metallurgical Power

摘　　要：介绍了邯宝能源中心原料变电站10 kV新投运电容器的运行方式、保护配置情况,通过1#电容器035开关不平衡电压保护跳闸分析,找出了原料站新投运电容器不平衡电压跳闸的原因——电抗器电抗率选择不合适,不能够抑制3次谐波;以及电容器在安装时容量没有均衡分配,导致电容器出现过电压而击穿一个电容器,进而形成三相电压不平衡。针对以上问题提出了解决方案,后期运行良好,没有出现相同的故障。This paper introduces the operation mode and protection configuration of the newly commissioned 10kV capacitor in the Hanbo Energy Center’s raw material substation.By analyzing the protection tripping of 1# capacitor 035 caused by unbalanced voltage, the tripping reason turned out to be the inappropriate reactor reactance could not suppress the triple harmonic. In addition, the capacitor capacity was not distributed evenly during the installation, which led to capacitor breakdown because of over-voltage, thus forming the unbalanced three-phase voltage. The solution was proposed for the above problems and the capacitor ran well without the same failure.

关 键 词：电容器 不平衡电压 电抗器 谐波 跳闸 

分 类 号：TM53[电气工程—电器]