Research On Power Grid Planning Evaluation Method Considering Transmission Cost Control

With the release of "Some Opinions on Further Deepening the Reform of the Power System"5the transmission pricing mechanism of "permitted cost+reasonable income11 and the marketing measures such as electricity transaction will have profound influence on the existing model and method of power grid planning.How to build a scientific and reasonable economic evaluation index system and method of the power grid planning scheme has been one of the hot issues.The current evaluation method and evaluation index system of the economic efficiency of the power grid planning based on the internal rate of return need to be revisited.This paper constructs an economic evaluation index system and method for power grid planning schemes suitable for China!s transmission and distribution price reform,analyzes the economic characteristics of transmission grid planning,studies the transmission and distribution price reform documents,and studies the development of regulatory economic theory and cost control.Research.Firstly,it analyzes the influence mechanism of power transmission cost control mode on grid investment and power grid planning and its impact mode.On the basis of studying the economic impact mode of power transmission cost control mode on power grid planning,it establishes its influence on power grid planning economy.The role model.Considering the multi-level and multi-dimensional effects of grid planning characteristics and transmission cost control modes on grid financial,market efficiency,environmental and social benefits,etc.,the economic impact factors of grid investment and grid planning are constructed.Bone map.Secondly,on the basis of establishing the fishbone diagram of the influencing factors,a multi-dimensional grid planning economic evaluation index system considering asset utilization,market contribution and regulatory objectives is constructed,and the life cycle cost considering cost control requirements is established.,unit asset transmission revenue,unit life cycle cost benefit,line loss ratio,equipment utilization and other power grid planning economic evaluation indicators including input and output benefits.Thirdly,a comprehensive evaluation model that comprehensively considers subjective and objective weights,based on experts The AHP method of scoring mode determines the subjective weight.The entropy weight method based on the characteristics of the scheme data determines the objective weight.The improved genetic algorithm is used to minimize the variance of the weights obtained by the above two methods,and weaken the calculation results of different methods.The difference between the subjective and objective weights Together,through fuzzy comprehensive evaluation of the optimal weight given composite score;Finally,a provincial power grid planning and actual market situation and other relevant data,numerical examples and analysis results show the effectiveness of this method.