Application Research On Reliability Evaluation Of Relay Protection In Intelligent Substation

Based on the design of a 110 k V smart substation,this paper analyzes the seconda ry component system and network structure composed of the relay protection equipment of the smart substation by reviewing the reliability literature of the relay protection equipment in the smart substation,and summarizes the secondary components of the smart substation.System configuration and fundamentals of components.Three secondary system configuration methods recognized by domestic power companies are compiled through the GO method.In order to explore the method suitable for the construction mode of the substation.The first chapter mainly introduces the background of the research on the reliability of relay protection automation based on smart substations in this paper,briefly expounds the theoretical research situation and technical route summar y of smart substations in Europe and the United States and other international regions.The mainstream construction models are classified and summarized,and the main research methods of this paper are introduced.The second chapter mainly introduces the basic information about the secondary component system and network architecture composed of relay protection equipment in smart substations,expounds the IEC61850 standard for the communication protocol of smart substations,and the actual application of this protocol standard in the design of smart substations.Analysis of the functional requirements and configuration principles related to the secondary component system and network construction composed of relay protection equipment in smart substations.The third chapter mainly introduces the logic symbols,usage methods and operation rules of the GO method,and introduces the specific application methods of the GO method for reliability model construction and reliability index calculation by taking a typical circuit as an example.The operation reliability index of the operation reliability model of the relay protection system used in the calculation of the GO method is analyzed,as well as the GO flow chart of the reliability model,the reliability calcula tion model and its calculation process.The fourth chapter builds the reliability models of three types of relay protection systems,which are main transformer protection,line protection and backup self-switching protection,respectively,based on the settings of three types of relay protection systems recognized by domestic power companies.Through the comparison of its reliability indexes,the scheme with the best reliability indexes of 110 k V intelligent substation is selected.The fifth chapter is guided by the reliability models of the GO method of the three relay protection systems,combined with the specification requirements of the actual relay protection application,and lists the specific measures that can improve the relay protection system.In this paper,the reliability of the relay protection device is calculated by using the GO method,and a calculation method that conforms to the relay protection device is formulated.The way to choose the construction mode presents a judgment method.