An Extended Mathematical Programming Model to Optimize the Cable Trench Route of Power Transmission in a Metro Depot

Abstract

<span>The necessary electricity of the workshops and buildings (W&Bs) located at the metro depot are provided by <span>lighting power substation (LPS). To transmit electricity between LPS and W&Bs, some trenches should be <span>dig and the requisite cables should be located in the trenches. This paper presents a new mixed integer linear <span>programming (MILP) long-term decision model to find the best cable trench route between LPS and W&Bs <span>and also the location of all W&Bs and LPS are fixed. In this problem, the objective is to minimize (1) used <span>cables cost, and (2) trench digging cost. It should be considered that there exist many cases in which the <span>minimum either used cables or trench digging does not result in minimum total cost. Therefore, in optimum <span>solution, a tradeoff between these objectives should be achieved. Finally, the proposed model is applied to a <span>real case study at the metro depot in Iran and the optimum solution is analyzed.</span></span></span></span></span></span></span></span> </span>