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Simplified approach for frequency dynamics assessment of 100% power electronics-based systems

机译：100％电力基于电子系统的频率动力学评估的简化方法

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Frequency behaviour of large power systems based on synchronous generation can be assessed using well-known simplified approaches based only the fundamentals of speed governing. In these methods, all generating units of a specific area are aggregated in one equivalent unit, displaying an average frequency behaviour of that area. Since the overall behaviour of the power system is changing with the increase of Power Electronics (PE)-based sources, the validity of these simplified approaches may be compromised. Based on the standard tools for Synchronous Machine (SM)-based systems, this paper proposes an equivalent one for the assessment of the frequency dynamics of 100% PE-based systems. In order to validate the approach, the 2-area 4-generator system was adopted as a case study. For a 100% SM-based and a 100% PE-based system, the frequency behaviour obtained with the simplified model was compared with that of the reference version simulated using EMTP-RV. It has been shown that these behaviours are consistent, presenting a good estimation of frequency dynamics indicators, even when the system presents heterogeneous values of inertia.
机译：基于同步产生的大电源系统的频率特性可以仅使用众所周知的简化方法基于速度管理的基础来评估。在这些方法中，特定区域的所有生成单元在一个等同的单元中聚合，显示该区域的平均频率行为。由于电力系统的整体行为随着功率电子设备的增加而改变（PE）的源，因此可以损害这些简化方法的有效性。基于基于同步机（SM）的系统的标准工具，本文提出了一种相当于评估100％基于PE的系统的频率动态的等效。为了验证该方法，采用2区域4发生器系统作为案例研究。对于100％SM基和100％的基于PE的系统，将使用简化模型获得的频率特性与使用EMTP-RV模拟的参考版本进行了比较。已经表明，这些行为是一致的，呈现出良好的频率动态指标估计，即使系统呈现异质值的惯性值。

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