Research On Visualization Of Secondary Circuit Of Smart Substation

Smart substations are an important part of the State Grid Corporation of China's goal of building a strong smart grid.After three phases of development,nearly 5,000 smart substations have been built nationwide.The smart station describes the secondary information connection relationship by describing the SCD file in the entire station system configuration,and converts the traditional quadratic drawings into SCD files based on the XML language description.The traditional substation can be seen,and the terminal and the hard connection are changed to be invisible to the smart substation,and the virtual terminal and virtual connection cannot be touched.The secondary circuit has undergone a fundamental change.The SCD file written based on XML language has poor readability.The staff masters the secondary circuit of the smart substation and needs visualization software.This paper takes the visualization of the secondary loop of the smart substation as the research object.Firstly,it describes the secondary structure and characteristics of the smart substation,and analyzes the changes and challenges brought about by the changes in the secondary circuit of the smart substation.The main functions and visualization process of the visualization tool are briefly described,and the visualization tool is applied to a 110kV new-generation smart substation of the national grid.The secondary virtual circuit and virtual connection included in the SCD file are visually displayed graphically,mainly including logical links.Figure,GOOSE send,GOOSE receive,SV send,SV receive.The visualization software function is not perfect,there is a tree structure to show that the IED device has a single form and version comparison is slow when SCD files are large,and it needs further improvement.For the visualized tree structure,the IED equipment is presented in a single form,and four classification display methods are provided according to voltage level,interval,device type,and alphabetical order.The device display mode is optional and can be switched freely,and the IED equipment related information can be displayed more comprehensively..When the SCD file is relatively large,the version comparison speed is slower.An SCD file comparison method based on the intermediate process file is proposed,which can effectively improve the efficiency of the SCD file version comparison and comparison,and it also includes cyclic redundancy code,links,and virtual loops.Hierarchical comparisons ensure the correctness of the SCD file comparisons.