higher consumer satisfaction level by fewer and shorter Abstract--Working outages such as component maintenance/ interruptions. exchange and system extension are important causes resulting in Outage scheduling is to determine the time interval for the out-of-service of customers in distribution systems. To have service zones that will be interrupted for engineering works.minimal frequency, duration, and loading of interruption whileThe optimal solution will not only depend on the time duration complete the scheduled works is much concerned in the more and needed for the work but also on the configuration of feeders more competitive power market. nde foraterist of the co nfigurvice ones.der In this paper, a reliability-centered outage scheduling and the characteristics ofthe customers in the service zones. It approach for distribution feeders is proposed. With considering is expected that the outage fulfilled during low load period daily load patterns, composite load profiles of the sections to be will result in higher reliability indices compared with that in scheduled are exploited to find the minimal energy not supplied high load period. Since distribution feeder is usually in radial (ENS) during the outage. Availability of inter-feeder load structure, reliability indices can be improved by carefully transfer is considered to avoid unnecessary load interruptions in planning inter-feeder load transfer for the customers of the the scheduling. A set of reliability-grade variation (SRGV) is defined to guide the approach to find the reliability-centered downstream service zones in case their upstream service zone solution. By using heuristic rules and SRGV defined, the is interrupted for works.proposed reliability-centered outage scheduling strategy Reliability evaluation for distribution systems has long been performs effectively. A numerical example is illustrated to concerned and well developed [1]- [3]. Algorithms of demonstrate the process and a practical system is simulated to maintenance scheduling for distribution systems have been test the effectiveness of the proposed approach.proposed and linked with reliability assessment [4]-[6].Index Terms--reliability-centered outage scheduling, daily Reliability-centered maintenance (RCM) is a qualitative load pattern, inter-feeder load transfer, heuristic rules, Outage systematic approach to organizing maintenance in depth to Management System (OMS) system reliability. Maintenance scheduling for distribution system has been dealt with from reliability-centered point of

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