Insulation property of wire-plane gap under fire condition: Effects of vegetation flame conductivity

Optimal management of vegetation maintenance and the associated costs of its implementation in overhead power distribution systems

“…After the solution front is obtained, the improvement stage is completed by submitting each solution to the mathematical model described by (7), (8), and (9). In that context, the implementation cost of some of the solutions is enhanced, as described in Fig.…”

“…This is demonstrated in Table 7, as the option of improved solution establishes a vegetation maintenance activity in network segment 11 for Crew 2, while in the solution in the first stage (before improvement), the same activity is carried out by Crew 1. The enhancement of the CI is performed in accordance with the minimization of the maintenance cost developed by the mathematical approach in (7), (8), and (9). The mathematical models in this work were run using the software GAMS (General Algebraic Modeling System) and the solver DICOPT, specifically designed for the solution of mixed integer non-linear mathematical models.…”

“…In (9), the models are combined when the binary variables ( , , ) and ( , ) take equal values for each network segment i of subperiod t, thus guaranteeing that the assignment of tasks is completed in accordance with the pruning plan and maintenance can only be assigned when required by the network segment.…”

“…In Model 3, only implementation costs of the pruning activities are minimized, subject to the same constraints in Model 2. min (7) Subject to: Equations (2) to ( 6), (8), and (9).…”

“…A criticality analysis of overhead power lines' assets based on decision support systems and risk management is proposed in [8] to improve preventive pruning programs. Additionally, the study in [9] presents the characteristics of leakage current of different vegetation flames and the effect of flame conductivity on wireplate gap breakdown characteristics.…”