Diagnostic Equipment for Distribution Transformer using IEEE Thermal Model

Abstract

Failure of distribution transformer in grid is one of the major causes of concerns. In India the failure of distribution transformer is around 25% per annum, which is higher compared to developed nations. It is necessary to keep transformer in service for uninterrupted power supply. For uninterrupted operation of the Transformer it is necessary to monitor the health of transformer effectively. The major factor that affects the transformers health is the thermal loading. IEEE has provided guide line for calculation of Transformers health based on hot-spot temperature. In this project an algorithm is developed for predicting the health of transformer using IEEE thermal model. The developed algorithm is validated using MATLAB simulation and measurement at laboratory. Based on the algorithm a practical tool will be developed for monitoring the health of transformer and tested for its workability at site conditions.