Design And Optimization Of The Secondary System Of 110kV Intelligent Substation

With the development of a series of technologies such as the Internet of things,mobile interconnection and artificial intelligence,the development of the substation is also facing higher requirements.The research and planning of intelligent substation is an indispensable part of the construction of smart grid in and out of the country at present and in the future.Therefore,the research on the design and optimization of the secondary system of intelligent substation is of great significance.This article first briefly outlines the development of intelligent substation,analyzes the architecture of intelligent substation,compares and analyzes the advantages and disadvantages of three kinds of topology structures commonly used in intelligent substation,and makes technical paving for the secondary network design of intelligent substation,and then summarizes and studies the key technologies of the intelligent substation.From the aspects of the system relay protection and safety device,system dispatching automation,substation automation,component protection and automatic device,the network,protection and communication of the Qiqu secondary systems are fully designed.Finally,the highlights of the secondary system design of the Qiqu substations are summarized and divided.The feasibility and economy of the application of the integrated protection and measurement and measurement in the Qiqu substation are analyzed.The superiority of the integrated unit intelligent terminal integration in the Qiqu is discussed.The application and application advantages of the hierarchical protection technology in the Qiqu substation are summarized,and the advanced application of the Qiqu intelligent substation is described and its application is described.The characteristics of the application highlight the design advantages of the Qiqu substations.Through the research on the design and application of Qiqu intelligent substation,the deficiency of the network structure of the three layer and two network in the intelligent substation is put forward,and the optimization scheme of the network structure of two layers and onenetwork is put forward.The feasibility of the key technologies to be overcome in the application of the network structure of the two layers and one network is analyzed,and the economy of the optimization before and after the optimization is made.Compare.After optimization,the messages of MMS,SV,GOOSE and IEEE 1588 are transmitted in common network,and the secondary equipment is designed by multi-function modularization,and the network simplification,equipment integration and hardware reduction are realized.For some secondary equipment,there are duplication of functions and redundant configuration,resulting in the enlargement of the space,the waste of resources and the increase of investment.The integration optimization of fault recording and network analysis is proposed,and the feasibility and superiority of the optimization and integration are analyzed technically and economically.Finally,in view of the shortcomings of the traditional splicing fiber cable in practical application,the prefabricated cable is adopted to replace the traditional fused optical cable to realize "plug and play",reduce the operation time and improve the safety and reliability of the optical fiber cable.