Justifying the proactive replacement of cable

Justifying the proactive replacement of cable,10.1109/PES.2011.6039491,Le Xu,Richard E. Brown

Justifying the proactive replacement of cable  
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Many utilities have aging underground cable sys- tems that are failing at an increasing rate. Unfortunately, aggres- sive underground cable replacement programs are often difficult to justify since it is difficult to know whether any specific cable section will fail in the near future. This paper presents a simula- tion based methodology to justify a proactive cable replacement program. Its application at a large US utility is demonstrated. This methodology involves the sampling of representative cir- cuits, the development of cable failure rate models and system reliability models that can track expected reliability over a twen- ty year period, and the sequential simulation of system reliability. Three proactive cable replacement scenarios are examined and their economics are compared, considering the integration of other reliability improvement projects.
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