讨论减少ABB变压器有载调压开关滑档故障的重要性及预防措施

With 220 kV Capacitive Voltage Transformer Three-phase Voltage Unbalance Fault Analysis

有载调压开关作为变压器的心脏,在电网电压调节中起到至关重要的作用。有载调压开关的故障有很多方面,根据运行经验,有载调压开关滑档故障占比较大,也是危害性最大的故障之一。有载调压开关滑档故障是指档位不断发生连续变化,滑档故障若不能及时停止,将引起系统电压剧烈波动,在两台并列的主变之间会产生很大的环流,造成设备损坏及电网事故。认识滑档故障的危害性、深入了解滑档故障的产生原因、如何减少滑档事故发生率,是作为检修人员必须掌握的知识和技能。

As the transformer＇s heart,the load regulating switch plays an important role in the regulation of the voltage of the power network. There are many aspects of the failure of the load regulating switch. According to the experience of operation, the ABB plant has a large load regulating switch. With the load transfer of the pressure switch slide file fault is a continuous change in the file, if the fault can not be stopped in time, will cause the system voltage fluctuations, in the two sets of main transformer will have a large circulation, resulting in equipment damage and power grid accident. Understanding of the dangers of sliding gear failure, in-depth understanding of the causes of the failure of the slide, and how to reduce the occurrence rate of the accident, is the maintenance personnel must be mastered the knowledge and skills.