MV/LV Overhead Transformer Monitoring and Hot Spot Temperature Estimation

Overhead electricity distribution networks are exposed to several risks, which can cause great damage to the utility's operation. Many of these possible occurrences may be imperceptible to the present monitoring and control systems of the distributors. The monitoring device of the overhead transformer that will be described in this article aims to provide the utility more information about the main asset of the overhead distribution network, the transformer. With the data of electrical quantities on the low voltage side of the transformer and calculation of the hot spot temperature of the transformer, in order to avoid major damage to the distribution network and mitigate any errors not detected by the utility. The study was carried out in a region with a high concentration of load with a predominance of commercial consumers in the city of São Paulo - Vila Olímpia.