Design Of 110kV Hongqi Intelligent Substation Renovation Project In Taizhou

In the process of power grid development,substation is the key part,which plays the role of mobilizing power flow direction and changing voltage.It directly affects the security and economic operation of the whole power system,is the intermediate link between power plants and users,and plays the role of transforming and distributing energy.Comprehensive analysis needs to seek better design concepts and methods,and design a series of products.It has become an important subject to be studied and solved in the future power grid construction to coordinate the work of various professional systems and stages in order to achieve the best comprehensive technical and economic benefits and meet the growing social needs.In the research of substation renovation,how to rationally use the key technology of substation access system and put forward the technical scheme and design scheme of Hongqi intelligent substation system access on the basis of considering the actual situation of power supply area is the main difficulty of this topic.This paper mainly carries out relevant research on this issue,the main contents are as follows:1.According to the existing equipment status of 110 kV Hongqi Substation,the potential safety hazards are summarized.On the basis of defining the existing problems of the power grid,the short-circuit current under the maximum operation mode of 110 kV is calculated as the key parameter basis for the selection of related electrical equipment.It lays a good foundation for the secondary system design of Hongqi Intelligent Substation.2.On the basis of the research on the design of primary electrical part and the key technology of secondary system access in substation,and based on the system status of 110 kV Hongqi substation,the access system scheme is studied in relay protection and automatic device configuration of substation,system telecontrol,AC/DC integrated power supply,intelligent auxiliary system,in order to adapt to the long distance of power grid.In order to meet the needs of the development,and effectively realize the convergence and integration of various application systems,good results have been achieved.The intelligent transformation of 110 kV Hongqi substation has been realized in this paper,ensuring the safe operation of the power system and electrical equipment,and improving the operation and power supply reliability of the equipment.3.Based on the specific engineering practice and the research results of feasibility analysis,this paper compiles the investment estimation and economic evaluation of the transformation project of this intelligent substation,which is divided into environmental protection,water and soil,energy conservation and social stability analysis,investment estimation,energy consumption analysis and calculation,and summarizes them.It also synthesizes the reliability of electrical equipment and the validity of the design scheme,and analyses the design scheme.The estimated investment and social and economic benefits.It ensures the improvement of operation and maintenance benefits of the intelligent transformation project and the economic requirements of the project.