基于动态相量模型的交直流系统混合仿真

Hybrid Simulation of AC/DC Power System Based on Dynamic Phasor Model

为了解决高压直流输电(HVDC)系统传统仿真模型的精度问题,提出了一种新的混合模型仿真算法来进行交直流系统的暂态稳定分析,分析中对HVDC采用动态相量模型,对交流系统采用传统机电暂态模型.通过混合仿真研究了HVDC动态相量模型与交流系统之间的接口迭代算法.算例结果表明,HVDC动态相量模型比电磁暂态模型具有更高的精度,且提出的接口算法能有效地应用于交直流系统的暂态稳定分析.

In order to improve the accuracy of the traditional simulation model of HVDC （ High-Voltage Direct Current Transmission） system, a novel hybrid-model simulation algorithm is proposed to analyze the transient stability of AC/DC system, in which the dynamic phasor theory and the traditional electro-mechanical transient models are respectively applied to the modeling of HVDC and AC systems. An iterative algorithm for the interface between the HVDC dynamic phasor model and the AC system is then investigated by hybrid simulation. It is then concluded that, as compared with the electromagnetic transient model, the HVDC dynamic phasor model is of higher accuracy, and that the proposed interface algorithm can be effectively adopted to analyze the transient stability of AC/DC system.