基于高频等值阻抗的机电-电磁暂态混合仿真接口模型

机电-电磁暂态混合仿真是当前研究大规模并网变流器与电网之间交互作用稳定性的有效手段,由于并网变流器的宽频带响应特性,使得传统以基频等值为目标的戴维南接口模型不再适用。针对于此,文中提出了一种基于高频等值阻抗的接口模型,该模型以受控源形式的戴维南等值电路为基础,既能体现机电-电磁侧交互的宽频特性,又具有较高的仿真精度。仿真算例验证了所提出模型的有效性。

An interface model of electromechanical electromagnetic transient hybrid simulation based on high frequency equivalent impedance

Electromechanical-electromagnetic transient hybrid simulation is an effective method to research the stability of interaction between large-scale grid-connected converters and power grid. Due to the wide-band response characteristics of grid-connected converters, the traditional Thevenin interface model which aims at fundamental frequency equivalence is no longer applicable. In this paper, an interface model based on high frequency equivalent impedance are proposed. This model is based on Thevenin equivalent circuit in controlled source form, which can not only reflect the wide-band characteristics of electromechanical-electromagnetic interaction, but also have high simulation accuracy. The effectiveness of the proposed model is verified by a simulation example.