Urban Substations Transformers Allowed Loading

Methodology is proposed for calculating the transformer temperature mode, when working with changing load schedule for random time interval (day, month, year). Transformer load technical and financial evaluation has been carried out to define parameters that do not require limitation of new consumer connections. For the function of automatic electricity accounting system, monitoring is recommended of the cooling ambient temperature for subsequent qualitative assessment of the thermal deterioration of the coil insulation and the remaining lifespan of transformers, in accordance with the proposed methodology.