中文摘要：

通过元件结构化模型中接口方程的分解、接口变量的分解以及接口变量的内在约束关系分析，给出了复杂电力大系统中元件结构化模型的多种表达形式，模型分析结果及多种表达形式的给出有助于深刻揭示电力系统元件的各种特征，同时也可方便元件结构化模型的灵活使用；总结了元件结构化模型建立的一般步骤，并通过给出电力系统中一些典型元件（包括同步发电机组、HVDC系统、TCSC和UPFC）的结构化模型说明了元件结构化模型的普遍适用性。

英文摘要：

Firstly by decomposing the interface equation and interface variable set and analyzing the internal constraint relation of interface variable set, the paper gives various expressions of component＇s structural model of large-scale complex power systems. The analysis, decomposition and the proposed various expressions would be very helpful to deeply depict the various characteristics of components of power systems, and could facilitate the use of component structural model. Finally, the general procedure of constructing component structural model is summarized, and the structural models of some typical components of power systems, such as synchronous generator set, HVDC system, TCSC and UPFC, are given, which demonstrates the generality of the component structural model.