Aggregated and Reduced-Order Admittance-Based Modeling for Efficient Small-Signal Analysis of Power-Electronic-Based Power Systems

IF 3.9 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC
Arash Safavizadeh;Abhay Kaushik;Seyyedmilad Ebrahimi;Juri Jatskevich
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引用次数: 0

Abstract

Aggregation and model-order reduction techniques may be applied to parts of large-scale power grids where the detailed dynamics of individual components are not necessary, thus enhancing the efficiency of the overall simulation. This article proposes an aggregated and reduced-order admittance-based modeling (ARO-ABM) that enables efficient and accurate time-domain simulations of power grids with converter-interfaced distributed energy resources (DERs). The ABMs of converter-interfaced resources (CIRs) with diverse structures and parameters are formulated as transfer functions. Then, the transfer-function-based ABMs of CIRs are aggregated along with their collector lines and impedance/ admittance-based model (I/ABM) of any other connected components, such as loads. The use of I/ABMs enables scalable aggregation of all CIRs, including those with fully known dynamic models, as well as those whose models may not be disclosed by manufacturers. This step is followed by the model-order reduction in the frequency domain. These steps result in the reduction of the computational complexity of the individual subsystems. The proposed method is demonstrated to enable the use of larger simulation time steps while maintaining good accuracy in offline (MATLAB/Simulink) and real-time (OPAL-RT) simulations of power-electronic-based power systems.
基于聚合和降阶导纳的电力电子系统有效小信号分析建模
聚合和模型阶数降阶技术可以应用于大型电网中不需要详细动力学分析的部分,从而提高了整体仿真的效率。本文提出了一种基于聚合和降阶导纳的建模方法(ARO-ABM),该方法能够对具有变流器接口的分布式能源(DERs)的电网进行有效和准确的时域仿真。将具有不同结构和参数的转炉接口资源(CIRs)的abm表示为传递函数。然后,将CIRs的基于传递函数的ABM与它们的集电极线和任何其他连接组件(如负载)的阻抗/导纳基于模型(I/ABM)一起聚合。使用I/ abm可以对所有cir进行可伸缩的聚合,包括那些具有完全已知的动态模型的cir,以及那些其模型可能未被制造商披露的cir。这一步之后是在频域进行模型阶约简。这些步骤降低了单个子系统的计算复杂度。所提出的方法被证明可以在离线(MATLAB/Simulink)和实时(OPAL-RT)基于电力电子系统的仿真中使用更大的仿真时间步长,同时保持良好的精度。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
8.60
自引率
0.00%
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审稿时长
8 weeks
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