OPTIMAL TRANSFORMER ALLOCATION UNDER SINGLE-CONTINGENCY

Under the single-contingency environment where interdependencies are i nherent, allocating transformers to substations ought to take on a sys tem approach In this paper, we present a multi-year mathematical progr amming model which determines the optimal allocation of transformers o ver a planning horizon. The possibility of relocating transformers fro m substations with low utilizations will be explicitly explored. To me et load demand, the model will identify the least-cost allocation and/ or relocation of transformers. It mill ensure that each substation's s ingle-contingency capacity exceeds its load forecast The alternatives to he evaluated include combinations of: additions via purchase, reloc ations from a transformer storage, and relocations within the network. Fort Myers, a small district of Florida Power and Light is studied as a ease example.