5239

4909

كارشناسي ارشد

سيستم هاي اقتصادي-اجتماعي

اصفهان: دانشگاه صنعتي اصفهان،دانشكده صنايع و سيستم ها

1388

دوازده،98ص.: مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

علي زينل همداني

حميدرضا كارشناس

11/3/89

ناصر ملاوردي

مهندسي صنايع و سيستم ها

ID4909

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Reliability based Optimal Preventive Maintenance Policy for High Voltage Circuit Breakers in Power Plants Robab Hatami r hatami@in iut ac ir 2010 03 10 Department of Industrial System Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi Ali Zeinal Hamadani Hamadani @cc iut ac irAbstractElectric power industry have always try to provide reliable electricity to customers and atthe same time decrease system costs High Voltage circuit breakers are an essential part ofthe power network This study has developed a maintenance and replacement schedulingmodel for high voltage circuit breakers that minimize maintenance costs while maintainingthe acceptable reliability This model quantify the effect of maintenance on reliability Amixture weibull distribution is used to system s failure rate function and a hybrid hazardrate recursion rule based on the concept of age reduction factor and hazard rate increasefactor is built up to model system reliability The model is based on sequential imperfectmaintenance policy Whenever the equipment reliability reaches the threshold R animperfect preventive maintenance PM is performed on the equipment The optimalreliability threshold R is determined by minimizing the maintenance cost per unit time inthe residual life of the system Finally the model is applied on Esfahan Regional ElectricCompany circuit breakers and a maintenance and replacement scheduling is presented Keywords High Voltage circuit breaker Preventive maintenance Imperfect m Reliability Mixtureweibull distribution Hybrid hazard rate function

علي زينل همداني

حميدرضا كارشناس

ناصر ملاوردي