变压器备自投拒动行为分析及改进

Analysis and Improvement of an Operation Failure of Backup Automatic Switch for Transformer

备自投在主供电源因故障退出运行时可迅速投入备用电源,以保证电力供应不间断。备自投在运行过程中受到各种情况影响会出现拒动情况。以某10 kV变压器备自投装置为例,阐述了因母线故障造成备自投装置放电进而导致备自投装置无法动作的情况,并提出相应的改进措施,有效提高了电源备自投装置动作成功率,保障了电网正常运行。

The backup automatic switch device can quickly turn on the backup power when the main power supply is out of operation due to a fault,so as to ensure uninterrupted power supply.In the process of operation,the backup automatic switch device may be affected by various conditions,and there will be a situation of refusal to operate.In this paper,a 10 kV backup automatic switch device is taken as an example,a specific situation that the backup automatic switch device cannot operate due to the device′s discharge owing to the busbar fault is illustrated and corresponding improvement measures are also proposed to effectively improve the success rate of the backup automatic switch device and ensure the normal operation of the power grid.