电力系统暂态仿真中自耦变压器模型的研究

Study of Model of Three-Phases Autotransformer in Electric System Transient Simulation

提出了暂态仿真中一种三相自耦变压器的模型 ,该模型将自耦变压器用理想自耦变压器处理 ,并应用受控源原理和修正后的阻尼梯形法推导出了对应的综合友模 ,易于在暂态仿真中建立节点电压方程。由于考虑了自耦变压器绕组间电的联系 ,使暂态故障仿真中自耦变压器一侧故障对另一侧的影响变得直接而准确。该模型经各种故障下的仿真计算 。

A new transient simulation model of the three phases autotransformer is described in this paper,in which the controlled voltage and current sources developed with modified damping trapezoidal method are engaged to form its synthetic companion simulation model.This model is apt to set up the node voltage matrix equations for programming and calculating.Having reflected the direct electric connections between the two voltage wings of the autotransformer,the new model has more immediate and precise effects on both fault and non fault sides of the autotransformer in transient simulations.The simulation calculation examples under all kinds of faults have proved that this transient simulation model is correct.