A Regional Smart Power Grid Distribution Transformer Planning Method Considering Life Cycle Cost

at present, in the research on transformation and adjustment of distribution transformers for regional smart power grid, most of them are around overhaul of high energy consumption or old transformers to prolong life. In the case of only one alternative distribution transformer, the original transformer is directly replaced by a lower power loss transformer to reduce cost. And through the comparison of these two aspects, the transformation plan can be determined. When there are a variety of alternative transformers, a replacement strategy of distribution transformers in regional smart power grid based on life cycle cost (LCC) is proposed in this paper. First, based on the life cycle cost of equipment level, the selection model of planning scheme is built. Then the replacement strategy is evaluated in order to clarify the most reasonable transformation mode and the best replaced time. Further, the feasibility and effectiveness of the strategy are verified by the relevant calculation examples. Finally, some measures to reduce LCC are put forward.