Optimization of distribution transformers maintenance using the ranking method

Considering the importance of distribution network transformers, their maintenance always have been of important issues in electrical power industry, as well as transformers performance in different levels has an effective and key role in maintaining stability and promoting the distribution network reliability. But several factors, such as incorrect operation, lack of survey and on timely review led to the creation of critical conditions for transformers. This critical conditions, in addition to leading to transformers life reduction or increasing repair costs, can sometimes led them failure of transformers and also consequently increasing distribution network interruption and energy not served.