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A Techno-Economic Framework for Replacing Aged XLPE Cables in the Distribution Network | IEEE Journals & Magazine | IEEE Xplore

A Techno-Economic Framework for Replacing Aged XLPE Cables in the Distribution Network


Abstract:

In this paper, a stochastic framework is proposed for optimizing replacement strategies of aged XLPE cables in the electric power distribution network. The proposed frame...Show More

Abstract:

In this paper, a stochastic framework is proposed for optimizing replacement strategies of aged XLPE cables in the electric power distribution network. The proposed framework facilitates realizing an economic value for the risk of unplanned outages, thereby shifting the paradigm of replacing aged XLPE cable from a technical decision that is solely based on diagnostic measurements to a techno-economic strategy. The proposed framework constitutes of three main phases: (1) obtaining a distribution for the aging process of XLPE cable due to water-trees, (2) modeling the replacement of the aged XLPE cable as a Markov decision process, and (3) applying a linear programming algorithm in order to solve for the optimal replacement policy. Based on the proposed framework, a critical health index is defined for optimum replacement, depending on the installation costs of a new cable and the unplanned outage cost.
Published in: IEEE Transactions on Power Delivery ( Volume: 35, Issue: 5, October 2020)
Page(s): 2387 - 2393
Date of Publication: 22 January 2020

ISSN Information:


I. Introduction

Developing reliable and cost-effective infrastructure management strategies has been a critical objective identified by asset managers in power utilities in order to achieve a smarter electricity grid. In particular a paradigm shift has been proposed for replacing critical assets such as power transformers, by applying a framework that is based on the actual condition of the asset, as an alternative to the conventional time-based replacement strategy that is solely relying on the nominal life expectancy of the apparatus [1]. A step moving forward was proposed by taking in consideration the economic value for the risk of failure in order to achieve a techno-economic replacement strategy [2].

References

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