Fuzzy dynamic model of power equipment state assessment

There is a strong growths of equipment fleet with expired specified standard service life in Russia. Substations equipment repair is necessary for no-break power supply to consumers. Optimal selection of equipment to be removed out of service leads to the whole power supply system reliability improvement. Equipment state assessment is an important task for determination of elements which fail to meet technical criteria necessary for power system successful operation with the purpose of reliable power supply to consumers. Transformer state assessment model development based on nondestructive testing data available at the moment is the objective of the present work. Developed model verification was performed on the base of data obtained during inspection of equipment being in operation. State assessment of TRDCN-63000/110 type power transformer installed at 110 kV substation located in the Sverdlovsk Region was performed in the context of the present paper. The results analysis was carried out and assessment model adequacy was confirmed.