FPGA-Based Real-Time Simulator Of Electromagnetic Transients In Electrical Power Systems

With the widespread application of distributed power systems,more and more power electronic devices are integrated into the power grid,which is detrimental to the stability of the power grid.Under such circumstances,the simulation platform for the power system requires a higher simulation requirement.At the same time,this also puts forward higher requirements for the power system simulation platform.At present,real-time simulators for power grids based on field programmable gate array(FPGA)have begun to receive widespread attention.FPGA-based real-time simulators have the characteristics of fast simulation speed,high simulation accuracy,easy expansion,and low cost.Facing the high cost and closed shortcomings faced by the current large-scale power system simulation,this article uses Python language to write popular and widely applicable electromagnetic transient simulation software,which can be applied to third-party FPGA hardware platforms.This article focuses on the design and implementation of the FPGA-based power system simulation platform,divided into the following parts:1.Circuit analysis methods and numerical integration algorithm issues in power system simulation.The composition method of the improved node equation for the differential discrete method of the components and the expansion of the circuit is explained,and the common numerical integration methods are analyzed,and the appropriate numerical integration algorithm is selected to determine the state change of the power electronic switching device.Analysis of numerical oscillations;2.Model and simulate common devices in power systems.The common components in the power system are divided into passive components and active components,passive components such as transformers,cables,loads,etc.,and active components such as wind power generation and generators.Various conventional transient simulation modeling methods of passive devices(ie electromagnetic transient simulation models)currently have relatively mature relevant conclusions.To summarize and compare this,select model methods with different accuracy under different simulation requirements.Establish a detailed model of the output characteristic model of the active device,and simplify the detailed model within an acceptable range,model the power electronic device,and select a suitable model method.The hardware implementation structure of various components in FPGA is researched,and a brief description is given in the article.3.Analyzed the ideal overall structure of the transient simulation program,realized the automatic recognition and compilation of the information of the power system model and the topology through the program of Python programming,and studied the improved node method that formed the augmentation,and completed the second phase of Simulink.In the second development,the program can automatically generate hardware description language code,combined with FPGA Zynq7020,complete the verification test of the program in program simulation and hardware simulation;4.Based on the analysis and development program of this article,select the IEEE standard power system model,realize the process performance under the transient state caused by disturbance in the hardware simulation based on FPGA,and simulate with the power system simulation platform RT-LAB Compare the results.