Software Design And Implementation Of Secondary System Simulator In Smart Substation

With the continuous development of smart grid,as the core of its key smart substation construction work is particularly important.However,the design of the secondary system of modern smart substation,system equipment operation,and system equipment maintenance are completely different from the traditional substation.The information automation level of the secondary system and the integration degree of the grid module have been improved obviously,and the corresponding will enhance the requirements for the staff on the smart substation secondary system operation and maintenance.Therefore,the operation and maintenance personnel need a secondary system integrated simulation platform to adapt to the new technology development background of the smart substation.This paper chooses FPGA as the main hardware chip to realize the above simulation platform,for its characteristics of real-time calculation and high-efficiency calculation.Moreover,the internal resources are in a state of parallel,which has excellent time characteristics under the multi IED logic concurrency of substation and can make the simulation results accord with the engineering practice.The hardware FPGA chip content requires support of the PC simulation software platform.After it decomposes and optimizes the download task,the platform downloads the simulation content to the chip for configuration,and then the FPGA is responsible for the protection and control logic operation,message simulation and status alarm of the secondary devices.Therefore,this paper designs a platform software of the smart substation secondary system simulation device.The research contents and concrete work are mainly from the following aspects:(1)This paper designs a graphical simulation modeling platform for the primary system of smart substation.It uses the object-oriented idea to build a component library of electrical simulation model of primary system,and designs the main attribute items and various editing functions of the component.According to the corresponding intelligent substation actual information,the main wiring diagram of graphical simulation model is built,and the data information and the logical relationship of the electrical components in the whole station are input.(2)The TP-MD-MNP algorithm is designed based on the three-phase structure of the power system.The power grid node matrix of the intelligent substation is calculated to get the current degree of node and the relation table of branches and leaves,and factorization path tree is constructed.(3)The optimized segmentation algorithm is designed,and the factorization path tree is optimized according to the factors such as branch and voltage level.After the deformation,according to the actual conditions of the hardware devices and FPGA chip parameters the optimized factorization path tree is partitioned and reorganized to realize the rearrangement of the node network topology matrix.Finally,in order to demonstrate the functions of the software platform of the secondary system simulator in smart substation and verify the performance of the simulation program,the software platform is simulated and tested.The final test result proves the correctness and stability of the algorithm and program,which shows that the software platform of the secondary system simulator in smart substation designed in this paper has certain application potential and feasibility.