Technical Steps to improve Energy Efficiency of Distribution Transformers

The requirements for managing distribution systems continue to present new challenges. Electricity is one of the most vital infrastructure inputs for economic development of a country. The demand for electricity in Egypt is enormous and is growing steadily. This growth has been slower than country’s economic growth. To balance this demand and supply of electricity, it is the time for electric utilities to go for energy efficient electrical equipment for huge savings as this would be utilized for future needs .Therefore, great effort has been directed to increasing the efficiency of distribution transformers and consequently reducing the losses and, hence, the operational costs. International standards, published by means of norms, define the power efficiency of transformers, taking into account the no-load losses, the load losses and capitalization equations. An increase in distributor efficiency is obtained through prior knowledge of loads per unit
loading and power factor adequateness. The objective at Middle Egypt Electricity Distribution Company (MEEDC) is to offer the best service to its customers through knowledge of their system and also through the acquisition of efficient equipment. The measurements of about forty different rating transformers are analyzed and their efficiency are calculated according to energy efficiency methodology These values are compared with the ideal transformers efficient tables at the same rating. Some steps are applied to energy efficiency improvement and presented.