【摘要】 为适应系统快速、精确仿真和分析、控制的需要 ,运用一种新的建模方法———基于时变傅里叶级数的动态相量法对统一潮流控制器 (UPFC)进行建模和仿真。该方法通过忽略系统状态变量所对应的傅里叶级数中那些不重要的项而对原系统进行简化 ,并且可以有效地将系统中的连续事件和离散开关事件结合起来。在建模过程中可以根据研究需要提取出UPFC暂态模型中的直流分量和需要考虑的各次交流谐波分量。通过与详细时域模型仿真计算结果的比较 ,证明了UPFC的动态相量模型是精确而有效的 ,并且可以大大节省计算时间更多还原

【Abstract】 In modern large-scale interconnected power system, FACTS devices play an important role. A newly developed method, dynamic phasors method in modeling power electronic devices is discussed in this paper. This approach is based on time-varying Fourier coefficient series of the system variables. By truncating unimportant higher order series and keep only those significant series, the dynamic phasors model can catch the dynamic behavior of the original detail model. This method is able to combine continuous and discrete events of the system effectively and filter out required components (dc or ac of certain frequency) from power electronic device transient mode. Dynamic phasors method presents a new point of view for FACTS devices modeling. In particular, two typical examples and their simulation results are presented to show the effectiveness of this method. This project is supported by National Key Basic Research Special Fund of China (No. G1998020305) and the Research Grant Council (RGC), Hong Kong SAR Government.更多还原