| Power energy is the cornerstone for social and economic development.Power transmission depends on the power transmission network of safe and economic operation.The research on transmission line path optimization is the basis of power grid planning and construction,and it is related to national economy and people’s livelihood.This is because,in the power grid planning,the grid space layout is the upper layer optimization,and the power transmission line path optimization is the basic optimization to support the upper layer optimization.Transmission line optimization is the premise and basis of the entire power grid planning.The optimization results affect the power supply reliability and safety of the power grid.It is also one of the decisive factors for selecting other auxiliary power transmission equipment such as insulators,towers and transformers.As an important weight of engineering construction,the path optimization scheme provides convenience for subsequent power grid planning,facilitates the implementation of engineering cost analysis of the whole life cycle,and facilitates the development of the lowest cost and most utilized transmission line construction plan.In this paper,the carbon emission cost and construction cost caused by transmission loss are considered while ensuring reliability and safety,and the transmission line path optimization research is carried out,so as to avoid the local optimization disadvantages of high-order operation and intelligent algorithm brought by linear programming method,and achieve the optimization results closer to the actual situation.On the basis of summarizing the influencing factors of transmission network path optimization in China,this paper considers the comprehensive cost of transmission line path optimization:carbon emission reduction cost,environmental cost,power shortage cost and construction cost caused by transmission loss as the weight parameters.Secondly,the transmission line planning area is divided into grid directed network,then the weight function of transmission line is established in the grid network,and the optimal transmission path is solved by Dijkstra algorithm.Finally,the unit cost price of carbon emission is changed to make sensitivity analysis on the path selection,so as to analyze the impact of carbon emission cost caused by transmission loss on the path selection,and provide Suggestions for the network structure planning and transmission project construction.This article will affect the cost of the transmission loss of transmission line planning,reliability,cost.construction cost and the geographical environment influence power superposition become the comprehensive cost of the circuit and the simulation results can be concluded that the cost of transmission loss in line comprehensive cost,reliability,cost,and the sum of construction costs and geographical environment factors affecting weight is checks and balances,the optimization results of the transmission line is to weigh the results of the two,transmission losses are indispensable factors affect transmission line,in the long run,considering transmission losses caused by carbon emission factors of transmission line the long-term operational cost is low.Using Dijkstra algorithm to solve the optimal path planning problem can simplify the complex grid constraints and has certain research significance. |
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