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UZUN KESİNTİLER SONUNDA DAĞITIM SİSTEM RESTORASYONU

DISTRIBUTION SYSTEM RESTORATION AFTER PROLONGED OUTAGES

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Abstract (2. Language): 
Most of the customer outages are the results of some problems related to distribution systems. Prolonged outages may cause cold load pickup problems because of the increased penetration of thermostaticallycontrolled devices and the loss of diversity among these devices. Since loads higher than normal may be expected after prolonged outages, restoration problems may occur when there is not enough reserve capacity in the substation. Therefore, distribution system restoration becomes an important issue and it directly affects costumer satisfaction and system reliability level. In the near future, with the increase in automation of distribution systems, the reserve margin of substation capacity will decrease. The decreased margin would require an effective restoration procedure following prolonged outages. Algorithms that will reduce the overall restoration time of distribution systems in case of excessive loads has been studied in the literature and it seems that it will be studied further in the next decays. This review paper intends to give a summary of what has been done and outlines the proposed restoration procedures for cold load pickup for single and for multiple distribution system supplies.
Abstract (Original Language): 
Elektrik kesintilerinin çoğu dağıtım sistemlerinde oluşan problemler sonucu ortaya çıkmaktadır. Dağıtım sistemlerinde termostat kontrollü cihazların artması ve bu cihazlar arasındaki eşzamanlılık katsayısının uzun süreli kesintiler sonunda kaybolması, soğuk-yük sorununa neden olmaktadır. Soğuk-yük uzun kesintiler sonunda sisteme tekrar elektrik enerjisi verilmesi esnasında aşırı yük yaratır ve indirici merkezlerde yeterli transformatör kapasitesinin bulunmaması halinde restorasyon sorunu çıkarabilir. Dağıtım sistem restorasyonu müşteri memnuniyetini ve sistem güvenilirlik seviyesini doğrudan etkiler ve bu nedenle üzerinde önemle durulmalıdır. Yakın gelecekte, dağıtım sistem otomasyonunun yaygınlaşması ile indirici transformatör kapasitesinin azalacağı ve azalan bu farkın, uzun süreli kesintiler sonunda etkili bir restorasyon prosedürü gerektireceği ortaya çıkmaktadır. Aşırı yükler durumunda dağıtım sisteminin toplam restorasyon zamanını azaltacak algoritmalar literatürde bulunmaktadır ve gelecek on yıl içinde daha da artacak gibi görünmektedir. Bu derleme makalesi uzun süreli kesintiler sonunda dağıtım restorasyonu konusunda yapılan çalışmaları özetlemeyi amaçlamakta ve soğuk-yük restorasyonunda yüklerin tek veya birçok kaynaktan beslenme durumunda literatürde önerilen restorasyon prosedürü üzerinde durmaktadır.
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