| With the increase of demanding for electricity,it is particularly important to implement scientific and rational planning for the extra-high voltage(EHV)and ultra-high voltage(UHV)power transmission lines that serve as backbones for power transmission systems in order to meet the needs of users who are thousands of miles away.The path planning of transmission line belongs to the category of path optimization,but it has its particularity.Combining GIS with AI can be applied to the planning and optimization of transmission line path.This paper constructs the transmission-line-path-optimization model based on genetic algorithm(GA),the automatic alignment tower position model of overhead transmission line and the transmission line three-dimensional(3D)display model.The corresponding Add-in plug-in module is developed on ArcGIS platform using C# and ArcObjects components.The overhead transmission line planning of 500 kV from Shangri-La’s Jiantang substation to Lijiang City’s Taian substation in Yunnan province is taken as an example.Through validated the models and discussed the results,the following research results and conclusions were obtained:(1)Established transmission-line-path-optimization based on GA model.According to the theoretical model of GA,the design is suitable for transmission-line-pathoptimization of planar linear model,and chose the floating-point coding strategy,to build the corresponding way of initial population,fitness function,selection,crossover and mutation genetic operators,the algorithm processes such as development to realize the corresponding ArcGIS plug-in.(2)The rationality,scientificity and superiority of GA in path optimization of transmission line are discussed by an example.Two sets of experiments are designed with examples: one group only considers the transportation factor and the other group considers the overall cost of each factor,respectively,using the GA path optimization plug-in constructed in this paper and the Dijkstra cost path algorithm in ArcGIS to optimize the transmission line planning path,get four paths.By comparing the four optimized paths with the built path,the optimal path using the GA in considering the overall cost of each factor is optimal,which verifies the rationality,scientificity and the superiority of the planning path optimization for overhead transmission Lines of the constructed GA model.(3)An automatic alignment tower position model of overhead transmission line was established.Combining the DEM data with overhead transmission line erected by catenary method,a model for confirming the tower position by real-time scanning terrain to determine the height of the transmission line to the ground was proposed.The corresponding ArcGIS plug-in was developed.Comparing actual poles of the circuit with the results of using this model verified the feasibility of this model,has reference and application value.(4)Established a 3D display model of overhead transmission lines.Combined with the overhead transmission line catenary formula,the corresponding ArcScene plug-in was developed and implemented.The 3D rendering of the overhead line was realized in ArcScene.Combined with the corresponding DEM,remote sensing image and tower model,the optimized overhead line of the line was constructed.Three-dimensional display can provide intuitive visual decision assistance. |
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