By the increase of the penetration of power-electronic-based (PE-based) units, such as\nwind turbines and PV systems, many features of those power systems, such as stability, security,\nand protection, have been changed. In this paper, the security of electrical grids with high wind\nturbines penetration is discussed. To do so, first, an overview of the power systemsâ?? security\nassessment is presented. Based on that, stability and security challenges introduced by increasing\nthe penetration of wind turbines in power systems are studied, and a new guideline for the security\nassessment of the PE-based power systems is proposed. Simulation results for the IEEE 39-bus test\nsystem show that the proposed security guideline is necessary for PE-based power systems, as the\nconventional security assessments may not be able to indicate its security status properly.
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