基本网络元件数学模型及电磁暂态分析研究

随着电力系统的规模增大和新型电力电子器件的接入,系统数字仿真具有了更大的复杂性,电力系统仿真对电力系统发展的重要性变得更加突出,已成为电力系统的研究、规划、运行、设计等各个方面中不可或缺的工具。文中介绍了电力系统仿真分析方法的研究现状;随后分析了电感、电容、变压器等网络元件的数学模型,得到了各元件模型差分化之后的计算表达式;最后通过编写C++程序,对一阶电路和二阶电路进行了暂态过程仿真,获得了不同电路下暂态电压与电流的时域变化曲线。通过与理论结果比较,确认了仿真结果的准确性和使用数字仿真对系统进行分析的可行性。

Research on Mathematical Model of Basic Network Components and Electromagnetic Transient Analysis

With the increase of the scale of power systems and the access of new power electronic devices, digital simulation of systems has become more complex. The importance of power system simulation to the development of power systems has become more prominent, and it has become the tools for the research and planning of power systems. This paper first introduces the research status of power system simulation analysis methods; then analyzes the mathematical models of network components such as inductors, capacitors and transformers, and obtains the calculation expression after the difference of each component model; finally, by writing C++ program, the first order The circuit and the second-order circuit are simulated by the transient process, and the time-domain curves of the transient voltage and current under different circuits are obtained. By comparing with the theoretical results, the accuracy of the simulation results and the feasibility of using the digital simulation to analyze the system were confirmed.