A kind of oil filter oil strain method based on synthesis ester oil partial alternative original transformer oil

The present invention discloses a kind of oil filter oil strain method based on synthesis ester oil partial alternative original transformer oil, includes the following steps：First stage：Original insulating oil in transformer is pumped by pipeline inside oil filter by oil filter, former mineral insulating oil is directly introduced into dirty oil tank, then, synthesis ester oil is introduced inside oil filter, pass through normal oil pressure, this synthesis ester oil is imported into inside transformer, until this process continues to that the ratio of synthesis ester oil and total oil mass in transformer reaches predetermined value；Second stage：By mixed transformer oil in transformer by being connected into flowline with oil filter timesharing, water removal filter process is completed inside oil filter, micro- water monitoring reaches standard requirement to this process lasts in oil in transformer.The present invention can significantly improve insulation recovery efficiency of the oil filter to transformer, a greater degree of water content reduced in insulating board so that the total moisture content in transformer drops to safer level.