In this paper, an adaptive concept of virtual generator (VG)‐based controller is presented for dynamic stability of stochastically‐modeled microgrids consisting of low inertia resources. For this purpose, considering a set of energy storage systems (ESSs) dispatched in the network, a controlled islanding scheme (CIS) is provided to dynamically control the microgrid frequency. In this context, based on the concept of center of inertia (COI), the proposed VG scheme is developed through mathematical formulation. Inter‐area torques evaluated by microgrid control areas in the COI frame are used as input signals of the developed VG‐based controller. Also, for the ESSs, an equivalent dispatch model is provided and developed through the microgrid dynamic model for improving frequency stability during inter‐area oscillations. The proposed VG‐based controller is an online and non‐model‐based scheme which controls several microgrid systems together as an integrated network connected to the upstream network. In order to evaluate the ability of the proposed scheme, real‐time simulations are carried out on two different test systems consisting of several microgrids. The system dynamic performances are evaluated in time‐domain simulations. Numerical results demonstrate the effectiveness of the proposed scheme in increasing system inertia constant resulting in a proper dynamic performance with a high damping ratio in facing severe inter‐area oscillations.

中文翻译：

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基于虚拟发电机的阻尼控制器，用于基于储能系统的低惯性资源微电网

在本文中，提出了一种基于虚拟发电机（VG）的控制器的自适应概念，用于由低惯性资源组成的随机建模微电网的动态稳定性。为此，考虑网络中调度的一组能量存储系统（ESS），提供了受控孤岛方案（CIS）以动态控制微电网频率。在这种情况下，基于惯性中心（COI）的概念，通过数学公式开发了提出的VG方案。由COI框架中的微电网控制区域评估的区域间扭矩用作已开发的基于VG的控制器的输入信号。此外，对于ESS，通过微电网动态模型提供并开发了等效的调度模型，以改善区域间振荡期间的频率稳定性。拟议的基于VG的控制器是一种在线且非基于模型的方案，该方案将多个微电网系统作为连接到上游网络的集成网络一起控制。为了评估所提出方案的能力，在由几个微电网组成的两个不同的测试系统上进行了实时仿真。在时域仿真中评估系统的动态性能。数值结果证明了该方案在增加系统惯性常数方面的有效性，从而在面对严重的区域间振荡时具有较高的阻尼比，从而具有适当的动态性能。实时模拟是在由几个微电网组成的两个不同的测试系统上进行的。在时域仿真中评估系统的动态性能。数值结果证明了该方案在增加系统惯性常数方面的有效性，从而在面对严重的区域间振荡时具有较高的阻尼比，从而具有适当的动态性能。实时模拟是在由几个微电网组成的两个不同的测试系统上进行的。在时域仿真中评估系统的动态性能。数值结果证明了该方案在增加系统惯性常数方面的有效性，从而在面对严重的区域间振荡时具有较高的阻尼比，从而具有适当的动态性能。