Asset Management of Underground Cable System for Industrial Estate in Thailand

Lifetime Estimation Based Health Index and Conditional Factor for Underground Cable System

“…This setting is based on a consensus of several experts in different departments in the focused organization involved with the underground cable system, such as the engineering, operation, and maintenance departments. The opinions of the experts are brainstormed together and with the aid of the AHP technique [10,17], the final weighting value can be assigned to each criterion. For the conditional factor evaluation, the criteria consisting of usage time, loading condition, failure frequency, reparation rate, network reliability, cable length and route configuration, as well as operational environment of the underground cable system are presented in Table 2.…”

“…Currently, many testing methods have been applied to assess the condition of underground cable systems and their components, such as partial discharge measurement to determine the type of defect [4] and localization technique [5,6], insulation resistance measurement and resistance of the earthing connection [7], ampacity and sheath voltage measurement [8], and thermography inspection [9], etc. Then, the quantitative health index, which regularly processes the inspection and testing results according to an organization's inspection interval to represent Energies 2021, 14, 8113 2 of 15 the actual condition of underground cable system, has been proposed in previous research works [10]. However, the proposed health index is static and probably only updated annually after the annual routine inspection and testing are performed.…”

“…To obtain the consensus of weighting determination in the organization, the analytic hierarchy process as a multi-criterion decision-making technique involving pairwise comparison is applied to solve complex decisions, which is difficult to quantify. The AHP technique is applied to brainstorm the opinions of the experts from various departments working with underground cable systems in an organization to determine the weighting value as a percentage of significance for all condition evaluation criteria as well as the weighting of each major component for condition assessment [10,17]. Five major components of underground cable systems (underground cable, joint, termination, manhole, and duct bank) are classified.…”