TY - BOOK AU - Waleed Abdelaziz Salem Attia AU - Ghada Mohamed Amer , AU - Ossama Elsayed Gouda , TI - Improving power transformer characteristics by using K- factor and narrow band width transformer (NBT) system / PY - 2012/// CY - Cairo : PB - Waleed Abdelaziz Salem Attia , KW - Harmonics KW - Hot spot temperature KW - Power transformer N1 - Thesis (Ph.D.) - Cairo University - Faculty of Engineering - Department of Electrical power and Machines; Issued also as CD N2 - Thesis work is foused on improving power transformer characteristics by using K- factor and narrow band width transformer (NBT) system . IEEE and thermal models of power transformer are modeled for 25 MVA, ona , ONAF cooling transformer . This thesis reviews the non linear loads effects on the transformers and the standard IEEE proced for derating of transformers which are under distorted currents UR - http://172.23.153.220/th.pdf ER -