A protection coordination estimation of distribution network for smart distribution management system

The smart grid offers new opportunities to improve the efficiency of operating and controlling distribution systems through the accurate information of the realtime situation of the network. And also, it is possible to automatically protect the network by using the communication infrastructure. The Korean Smart Distribution Management System (KSDMS) project launched at 2009 to achieve advanced distribution operation for potential smart grid systems in Korea. The KSDMS allows the optimization for operating and controlling the network, whose circumstance is hourly changed by the energy supply(depending on Distributed Generator(DG)) and consumption(depending on Load), by using the various analysis and control software. And also, in KSDMS, the energy security is highly considered by using the protection estimation method which automatically changes the setting value of protection coordination under the circumstance. In this paper, an adoptive algorithm for change and estimation of the protection coordination setting is proposed, and the protection coordination scheme designed in KSDMS is briefly introduced.