Research On Design Of Power Transmission And Transformation Engineering Based On Fuzzy Analytic Hierarchy Process

The power transmission and transformation project has obvious characteristics of high investment and complex technology,so optimizing its project management level is the most important.The existing transmission line selection methods are usually only determined according to the engineering experience,and the rationality of the selection is obviously related to the level of the decision-makers themselves,which leads to the possible uncertainty in the selection of transmission lines.Therefore,it is necessary to put forward a reasonable idea of transmission line selection.Comprehensive evaluation of transmission line design is carried out in consideration of economy,construction technology,social environment and construction environment,so as to determine the best line scheme.In this paper,based on the project experience,several candidate schemes are put forward,and the evaluation model including multi-layer indexes is established to evaluate the candidate schemes in fuzzy comprehensive way,so as to determine the optimal transmission line path.At the same time,the substation design is combined with power load forecasting and other technologies.The main research contents are as follows:1)The fuzzy analytic hierarchy process model is established for the evaluation of line connection scheme.Firstly,the basic principles of index selection are analyzed,and the index system of AHP is further established from four aspects of technology,economy,construction and environment.Based on the established logical structure,the weight of each index is calculated,and a complete index of all factors is constructed,and the calculation of fuzzy evaluation is analyzed.2)The system access scheme of intelligent station transmission and transformation project is optimized.The first step is to analyze the basic situation of the project,discuss the necessity of the project,and then elaborate the current situation of the power system in the region,analyze the current deficiencies,and analyze the future development plan of the power system.On the basis of the above,the relevant candidate schemes of the system access scheme are designed,and the scheme is optimized and evaluated based on the established fuzzy AHP model.The specific electrical calculation verifies the scientific validity of the design scheme.3)Carry out specific scheme design for power transmission and transformation project of intelligent station.First of all,the main requirements of the design are analyzed,and the detailed requirements of the main electrical wiring,equipment parameters,short-circuit current level and neutral point grounding modeare considered.In the aspect of line design,the principle of line selection is considered,the route scheme is designed,and the specific analysis and design of line scale are carried out.In the aspect of substation design,combined with the requirements of the system,the main electrical wiring of the substation is designed,and the selection of the main equipment is carried out,and the design of the station power and lightning protection grounding is carried out.The case study verifies the practical value of the fuzzy AHP comprehensive evaluation system.