Research On The Electrical Main Equipment Selection And Optimized Configuration Of The 220kV Intelligent Substation

With the construction and development of the power system,the 500 kV power grid has become the main grid,and the 220 kV power grid has gradually formed a grid pattern that operates in a layered area.Smart substations have become the main development direction of the national power grid.In the construction of intelligent substations,the selection and optimization of power equipment are important links to ensure the safe and stable operation of substations and the economics of construction.This article takes the actual engineering construction project as the research background,and conducts in-depth research on the selection and optimization of the main electrical equipment of 220 kV smart substations.This paper combines the construction project of the newly built 220 kV smart substation in Yujia Lake,Wuhan City.Based on the access system plan of the substation,the power load situation and the main electrical wiring plan of the substation,the following research work has been done in the selection and optimization of the main electrical equipment:(1)Based on the original data of the newly built substation,a detailed analysis of the construction scale and main economic and technical indicators of the newly built 220 kV smart substation was carried out.According to relevant national regulations and standards,combined with the actual construction of the project,the substation electrical Main equipment selection and optimized configuration scheme.(2)In view of the selection of main electrical equipment in substations,this paper uses the gray system model theory to establish a gray model for power load forecasting,predicts electricity consumption for 6 months,and selects the main electrical equipment based on the load forecasting results.(3)In combination with the selected main electrical equipment model,the nonlinear programming optimization theory is adopted,the optimization parameters are set,the economic efficiency is the goal,the power,safety and stability are the constraints,and the optimal configuration of the main electrical equipment of the 220 kV smart substation is established mathematical model.(4)According to the established mathematical model of the optimal configuration of the main electrical equipment,use nonlinear programming methods to program it,and use the Yalmip toolbox to solve the established model,so as to obtain the condition of the main equipment after optimization.In order to verify the scientificity and rationality of the optimization results,a comparative analysis is made in this paper.The results show that the optimized 220 kV substation equipment selection can not only meet the requirements of safe and stable operation,but also improve the equipment selection efficiency and economic performance.