Digital Monitoring and Assessment of Lifetime of Underground Substation Traction Units

The paper examines crucial components digitization of traction substations railway direct current and underground. Service life assessment method of traction transformers and converters according to the observed level of depreciation are offered. Traction substation of underground as an example, based on systemic experimental measurements of currents and stresses of traction units in real time, data on the observed depreciation of the investigated object were obtained. Verification of the calculated data was carried out using a thermal imaging inspection.