Design and implementation a new model for preventive maintenance of medium voltage electrical distribution networks

The distribution companies in many countries apply Preventive Maintenance method these days. In this method periodic preventive services and repairs are used to decrease the faults. The prominent point in the systematic maintenance and repairing is that because of the limitations in different sections, in many occasions doing these periodical services with the same priority for all of the equipments is not possible and it is not economical in some situations, as a result providing a special time pattern for each equipment on which repairing is done, is so important. In this paper, with incorporating Preventive Maintenance model and Analytic Hierarchy Process model, a pattern is presented that decreases the costs, reduces the time and unexpected outages, then the results of applying the suggested pattern for eliminating loose connections of the medium voltage networks are indicated.