为研究含TCSC的电力系统的稳定性和动态特性及设计TCSC的实用化控制策略,提出了计及电抗器支路电阻影响并结合动态相量法的TCSC建模方法。动态相量模型是随时间缓慢变化的非线性、大信号模型,适合暂态过程快速而又精确地仿真,但传统动态相量法存在状态空间方程阶数随着计及频率成分增加而迅速增长的问题。故在分析模型的状态变量特性,忽略快速变量的动态变化过程后,由动态相量与傅立叶系数间的关系建立了计及电抗器支路电阻影响的TCSC动态相量法模型。仿真算例验证了所提出模型的精确性和有效性。
To better understand and control the interactions between TCSC and power system, a kind of dynamic phasors model of TCSC considering resistance influence of reactor branch is proposed. Firstly, the importance of considering resistance influence of reactor branch and adopting dynamic phasors method is demonstrated. Secondly, it is pointed out that the model-order of traditional dynamic phasors method increases greatly including more harmonics for a better accuracy. Thus, the characteristics of state variable and the relations between dynamic phasors and Fourier coefficients are analyzed, and a novel dynamic phasors model of TCSC considering resistance influence of reactor branch is proposed. The validity of the model is demonstrated by comparing time-domain model with Matlab, and this model is useful in transient stability and control scheme design.