Evaluation of transformer loading and energy loss for increasing energy efficiency in distribution system

Estimating loading per cent of a distribution transformer and energy loss during power transformation for a continuous process industry having High Tension (HT) to Low Tension (LT) power conversion in its distribution is an imperative for the betterment of energy efficiency. This is done by measuring and analysing active and apparent power at utilization and compensated reactive power at transformer end at standard industry operating condition. Thereby transformer loading level and operating efficiency is derived with the help of actual load test results. Transformer loading level estimation with transformer secondary current (conventional method) and estimation by power flow (proposed method) are compared with standard and energy loss of the transformer is expressed as percent of total energy. A case study in an industry is also given as an implementation of suggested the methodology for the scope of increasing energy efficiency.