Application of the dynamic phasors in modeling and simulation of electronic converters

Abstract

In order to present accurate and simple models for the power system components including electronic converters, such as FACTS devices, a new method based on dynamic phasors is proposed. Dynamic phasors are based on time-varying Fourier coefficient series. By truncating the unimportant higher order Fourier coefficients and keeping only those significant series, the dynamic phasors model can catch the dynamic behavior of the original detailed model. Dynamic phasors present 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.

隨著靈活交流輸電系統 ( FACTS)元件在電力系統中的廣泛應用 ,為適應針對包含電力電子器件的設備建立簡單而又較準確的數學模型的需要 ,文中提出一種基于時變傅里葉級數的動態相量建模方法 ,可以適用于包含電力電子器件的元件建模。該方法通過忽略系統狀態變量對應的傅里葉級數中那些不重要的項而對原系統進行簡化 ,建模過程中保留可以反映模型本身特性的主要級數項 ,然后由這些保留項構成動態相量模型的狀態變量。經過和詳細時域模型仿真計算結果的比較 ,證明動態相量模型是準確的 ,并且可以大量節省計算時間