新的基于相分量的变压器模型及其在统一广义双侧消去法中的应用

提出了一种新的基于相分量的变压器模型，并通过对基本模型的拓展，将该模型成功地应用于统一广义双侧消去法中，克服了统一广义双侧消去法不能包含变压器的信息，不能直接对具有不同电压等级的复杂电力系统网络进行求解的缺陷，拓宽了统一广义双侧消去法的应用领域。该模型没有对变压器进行任何形式的等效，而是通过一导纳矩阵对变压器进行描述。该导纳矩阵包含了变压器各绕组的联结方式、变压器的电气参数及变压器中性点的接地方式等信息。实际算例表明，该模型计算精度高，且该模型所需的输入参数少，输入灵活，便于实际工程应用。

A NOVEL PHASE-COORDINATE TRANSFORMER MODEL AND ITS APPLICATION TO UNIFORM GENERALIZED DOUBLE-SIDED ELIMINATION METHOD

A novel phase-coordinate transformer model is presented, which is successfully applied to the uniform generalized double-sided elimination method (GDSEM) through evolution of the basic model. By the novel transformer model used, the uniform GDSEM can directly solve the short current distribution in complex power system networks with different voltage levels. Thus the application field of the uniform GDSEM is broadened. The model describes a transformer by an admittance matrix. The admittance matrix includes the information about the winding connection of the transformer, the electrical quantities of the transformer, and how the start points are connected. Calculation results show that the calculation precision is high, and the input needed for the model is few and flexible. The model is easy to use in practice.