排油注氮装置重锤误动引发的主变压器事故分析

Accident Analysis of Main Transformer Caused by Heavy Hammer Misoperation of Oil-drainage Nitrogen-injection Device

随着大容量主变压器在系统内的运行数量的增加,排油注氮消防系统得到大量使用。在防止主变压器故障着火的同时,排油注氮装置的可靠性对主变压器安全运行起着重要作用。装置重锤结构设计的不合理,可能会在外部故障诱因的影响下扩大事故,造成主变压器的损坏。通过一起主变压器事故,分析事故过程,结合排油注氮装置重锤的结构特点,阐述了该装置存在误动的可能性,并提出了相应的预防措施。

With the increase of large - capacity main transformer running in the system, the oil - drainage nitrogen - injection fire -fighting system has been used greatly. The reliability of oil -drainage nitrogen -injection device plays an important role in the safe operation of main transformer while preventing the main transformer firing caused by fault. The unreasonable design of the structure of the heavy hammer may expand the accident by the influence of external fault so as to cause the damage of main transformer. Through the analysis on an accident process of main transformer, and combined with the structure features of heavy hammer in oil - drainage nitrogen - injection device, the possibility of misoperation is described and the corresponding precautionary measures are proposed.