According to the operation characteristics of 500 kV natural oil circulationtransformer,the cooler control circuit of ODFSZ-250000/500 transformer in Tan Jiawan substation is analyzed,and the reforming scheme is proposed.

• 根据500 kV自然油循环变压器运行的特点,针对谭家湾变电站型号为ODFSZ-250000/500变压器的冷却器控制回路进行分析,并提出改造方案。