Research on cost-benefit analysis and evaluation of regional distribution network planning

According to the difficulty of separation and calculation for cost and benefit of distribution network planning, the model of incremental cost-benefit evaluation is established. In the model, the planning projects are regarded as the extending projects of original power grid. Cost is incremental cost caused by the planning investment and benefit is incremental benefit caused by incremental electricity sale. The theory of capital time value is used to evaluate the economy by calculating NPV. Shijiazhuang distribution network planning is used to verify the validity of the model and the result shows that the model has great practical value.