<strong>Development of an asset lifetime model for distribution network management</strong>

Abstract

Aging infrastructuresprovide and maintain a specific level of service to consumers. In this regard, efficient replacement polices are needed. This paper proposes a method for improving renewal efficiency in water supply systems through a reliable asset lifetime model that will lead investments to those elements with greater impact in service provision to the end user. As uncertainties are minimized, the likelihood of failure will be more accurate and renewal investm Therefore, the failure predictor model has been built in a reliable manner through collected data from Madrid distribution network which comprises more than 17.000 km with over 400.000 water pipes. It is based on the statis gathered during four complete years. Additionally, detailed information from more than 4.400 disturbance events was recorded through field visits and laboratory essays of soil and pipe materials when failures were repaired. Examination of such large series of data recorded allows a better understanding of explanatory factors of failures. It is an essential step for building a consistent asset lifetime model. According to this model, a renewa on the risk of service disturbance and involved costs. It supports planning and operation decisions reaching failures reduction and system resiliency improvement.