Study On Data Transmission By Sharing Network In Smart Substation

Smart substation is an important part of smart grid,It has the characteristics of digitalization of information,networking of communication platform.The main starting point is information sharin.The network jump of protection device makes the centralized protection,wide area protection,interactive hot standby and dynamic configuration maintenance possible.It can improve the protection performance.And,data sharing is conducive to reducing the cost of substation and improving the level of equipment operation.However,the intelligent substation still adopts three layer and two network architecture mode.Station control layer MMS data,process layer GOOSE and SV data are transmitted separately.The protection device adopts the mode of direct mining and direct jump,which leads to low data sharing degree,multiple fault points,low utilization rate in substation.Based on the above reasons,it is of great significance to study the data sharing of Smart Substation data transmission to solve the problems encountered in the smart substation.In this paper,a data transmission by sharing network scheme for Smart Substation is designed,which can improve the data sharing and equipment utilization,data flow control and information security transmission.This paper first introduces the research status of Smart Substation in relay protection tripping,data transmission,networking and information security at home and abroad.The data transmission requirements of smart substation are studied.In order to solve the problems existing in the "three layers and two nets" mode of smart substation,a data sharing transmission scheme for intelligent substation network integration is designed.This paper gives the application of intelligent substation functional requirements,message transmission mode and data flow model;data on common network transmission mode,data transmission delay in substation is calculated;study of intelligent substation information security requirements,the station control layer and substation spacer,secure transmission of data interaction between the spacer layer and process layer;finally to Yang Jia Yuan 220 kV substation as the test environment to verify the feasibility and correct of scheme which we designed.