Optimal Operation Of Power Transformers In PowerudSystems In A Depressed Economy

摘要

Power transformer is one of the most importantudequipment in an electric power transmission anduddistribution system. It is very essential inudascertaining the reliability of any power utility. Itudis therefore critical therefore that the powerudtransformer operates continuously in order toudoffer reli11ble and efficient electricity supply.udUtilities arc therefore facing considerableudconcern to ensure their critical asset's reliabilityuddue to deregulation, increased demand, economicudpressures, and profit constrains. Most of theudpower transformers develop faults and getudcritical over a period of time.udThis paper presents the major causes of powerudtransformers' failure and maintenance strategyudand optimization techniques presently beingudadopted in Abuja Distribution zone. The resultsudof the study and analysis on 107 injectionudsubstations serving about 3876 distributionudtransformers show that the major contributingudfactors includes: earth 1:1ults and over currents.udUseful recommendations based on newudtechnologies are presented on how to ensure thatudpower transformer would serve closer to its ratedudoutput and life without sacrificing its integrity.udThe paper will be of importance to powerudsystems managers and operators for improvingudthe reliability of transformers.