A method of approach to the consideration of power-distribution-system costs

THE design of the various component parts of a power-distribution system to obtain low cost has been discussed at length in many published articles. These have, in general, considered either specific parts of the system only, or all parts of the system but for only one specific set of conditions, such as load density, system voltages, continuity of service, and so forth. It is the purpose of this paper to present a generalized method of approach to the consideration of power-distribution-system costs for various combinations of conditions when considering collectively the costs of each of the three basic elements which make up the so-called distribution system. These elements are: 1. The subtransmission circuits supplying the distribution substations. 2. The substations which transform from the subtransmission to the primary voltage. 3. The primary distribution system.