Supported by National High Technology Research and Development Program of China(2007AA04Z411);National Basic Research Program of China(2009CB724505-1);Open Fund of State Key Laboratory of Power Transmission Equipment & System Security and New Technology(2007DA10512709405)
During the operation of power transformer,its oil-paper insulation is continuously subjected to various stresses,c.g.,the thermal,electrical,mechanical,and chemical stresses,which cause insulation aging gradually.It h...