电力系统不同时间尺度仿真对比研究

Research on Comparison of Different Time Scales Simulation for Power System

电力系统的运行需要数字仿真来进行分析。电力系统非实时仿真技术包括电磁暂态过程仿真、机电暂态过程仿真以及中长期动态过程仿真。针对不同的动态过程需要采取不同的仿真方法。在参考已有相关文献的基础上,对电磁暂态、机电暂态、中长期动态过程仿真在步长、数据形式、规模、适用场合上进行了对比分析。以逆变器为例研究了电力电子电路在这3种仿真方法中建模的区别,并在PSCAD/EMTDC和Matlab中搭建模型,用波形更清楚地表明了3种仿真方法的区别,验证了逆变器不同建模方法的合理性,该建模方法可以为其它电力电子电路的建模提供依据。

The operation of power system needs digital simulation for analysis.Non real-time simulation technology of power system includes electromagnetic transient process simulation,electromechanical transient process simulation and mid-term and long-term dynamic process simulation.According to different dynamic process,different simulation method is adopted.Based on the relevant references,step,data form,scale and applicable occasions of electromagnetic transient,electromechanical transient and mid-term and long-term dynamic process simulation is made in this paper.Taking inverter for example,the modeling method difference of power electronic circuit is studied in the three simulation technology,model is builtl in PSCAD/EMTDC and MATLAB,and waveform is used to show the difference between three simulation methods more clearly.The simulation results verify the rationality of different modeling method,which proves that these modeling methods can provide basis for other power electronic circuits.