Design Of 110KV Intelligent Substation System In Nanchang And Research On Some Key Technologies

China’s distribution of resources is uneven.Only by using energy deployment methods to solve,it is necessary to establish a high-efficiency,long-distance transportation network.As an infrastructure that relates to the stable development of the national economy,grid facilities need a stable working environment to provide a stable energy supply for sustained economic development.Therefore,the power grid itself needs to have intelligent automation to improve its ability to quickly respond to accidents,reduce the time of power outages,and improve the reliability of power supply.This mode of power grid is conducive to the development of a variety of energy intensification.For Nanchang City,which is in a state of development,it is particularly necessary for reliable power supply to meet the needs of economic growth.Therefore,this article uses the 110 KV intelligence substation in Nanchang City.For the case,research on the design of smart substations is of great significance to improve the power supply reliability of Nanchang power grid.Based on the theory of advanced related technologies such as IEC 61850 Convention,smart devices and networks in smart substation technology,this paper conducts an in-depth study on the intelligent devices such as transformers,GIS equipment,and intelligent switchgears in smart substations.The actual situation of the110 KV intelligence substation project site in Nanchang City,the calculation of the primary substation,110 KV side electrical equipment,conductors,intelligent transformers and other primary equipment calculation and model selection,determine the primary substation wiring.Through the principle analysis of the key technologies applied to secondary equipment,secondary systems such as secondary networks and total station clock systems,integrated power systems,and intelligent auxiliary systems of intelligent substations are designed to integrate a secondary intelligent equipment in Nanchang City.The substation forms the three-tier and two-network structure of station control layer,bay layer,process layer and inter-layer network to complete the design of the smart substation.Finally,this article mainly describes the application of the all-fiber current transformer and optical voltage transformer used in the integrated monitoring system and design,and summarizes the application of new technologies and new equipment in this substation design.The effect provides a reference for the promotion of new technologies.