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Bulk power system frequency stability assessment in presence of microgrids

机译:存在微电网的大电网系统频率稳定性评估

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摘要

An attempt is made in this paper to propose an analytical approach to mathematically assess the impact of MGs penetration level on power system frequency stability. Firstly, experimental-based model of constitute DGs of the University of Kurdistan-MG (UOK-MG) in islanded mode may be derived. Afterwards, realistic model of the MG in grid connected mode may be derived to realize penetrated system for future studies. Finally, some simple algebraic equations are derived to predict frequency dynamics of interest in penetrated system. The method interprets the frequency dynamic behavior of the penetrated system based on the conventional system in terms of frequency nadir, Rate of Change of Frequency (RoCoF), steady state deviation and a rolling window. Simulation results demonstrate high efficiency of the proposed approach for dynamical modeling and stability analysis of penetrated power systems.
机译:本文尝试提出一种分析方法,以数学方式评估MG的渗透水平对电力系统频率稳定性的影响。首先,可以推导基于孤岛模式的库尔德斯坦大学MG(UOK-MG)构成DG的基于实验的模型。之后,可以推导MG在并网模式下的真实模型,以实现渗透系统的研究。最后,推导了一些简单的代数方程,以预测渗透系统中感兴趣的频率动力学。该方法根据频率最低点,频率变化率(RoCoF),稳态偏差和滚动窗口来解释基于常规系统的穿透系统的频率动态行为。仿真结果表明,所提出的方法对于渗透电力系统的动力学建模和稳定性分析具有很高的效率。

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