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A Comprehensive Scheme for Reliability-Centered Asset Management Implementation in Power Distribution Systems

Dehghanian, Payman | 2011

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 42967 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Fotuhi Firuzabad, Mahmoud
  7. Abstract:
  8. Toward the cost-effective solutions for the challenging features of maintenance in nowadays restructured power systems, reliability centered maintenance (RCM) has been introduced as the efficient key due to its streamlined performance. RCM, although has proven its noticeable merits in many industries, has not been yet furnished with efficient analytical methods in the power engineering context. In a power distribution system, vividly in a deregulated market and restructured environment, blind time based maintenance of all the distribution equipments is neither affordable nor economically justifiable. Moreover, an acceptable level of system reliability is an indispensable criterion for the successful operation of a power distribution system. So, it would seem rather logical to have the operators focus their priorities on some critical components to avoid missing the possible opportunities for cost-effective decisions. Only then can we focus and allocate our resources properly to make our actions as useful as possible. To enhance the cost effectiveness of distribution maintenance policy and particularly from the asset management point of view, this thesis firstly proposes a new applicable qualitative-quantitative approach based on analytical hierarchical process (AHP) to determine the most critical equipments to be prioritized in maintenance scheduling. To obviate the need for an all-inclusive RCM framework for power distribution systems, this theis introduced the concepts and generally discussed the offered framework and stages. The proposed algorithm consists of three main stages. The prerequisites of the analysis are outlined in the first stage. In the second stage, an approach is developed to identify the network critical components, more from the reliability point of view. Then, having modeled the failure rate of critical components, an efficient cost/worth evaluation approach is proposed in this stage for distinguishing a variety of maintenance plans. The optimal set of maintenance strategies are next adopted for implementation. This stage can also be considered as the heart of the algorithm. The algorithm is terminated in the third stage by recording both technical and economical outcomes for tuning the forward maintenances. The proposed methodology, albeit tailored to distribution networks, is generic enough to be applied in other power system levels. This thesis also accomplishes the goal of step-by-step presentation by simulating the proposed RCM scheme in a real power distribution system of Stockholm, Sweden. It is interesting to note that the proposed algorithm has been recently placed at the point of focuses in Iran to be practically implemented in its power distribution systems.
  9. Keywords:
  10. Reliability Centered Maintenance ; Asset Management ; Electricity Distribution Network

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