This study highlights that earthquakes can lead to short-circuit faults, power outages, and equipment damage in distribution systems. Based on the observation of the effects of two major earthquakes that occurred in Turkey (February 6, 2023), a new analytical model for strengthening distribution systems against natural disasters is proposed in this study. In this model, the distribution system is analyzed, and the fragility index of the buses is determined. The technical condition of the distribution system is assessed using fragility indexes, and integration and sizing of Distributed Generation (DG) and energy storage units are performed to ensure energy continuity after an earthquake. This fragility index takes into account both the operation of the distribution system in island (microgrid) mode and its operation connected to the main grid. In addition, with the fault index recommended within the scope of the analytical model, the vulnerable points of the distribution system against short circuit faults are analyzed and short circuit fault currents are limited at these points. Thus, the resilience of distribution systems against natural disasters such as earthquakes can be enhanced with the proposed analytical model.

中文翻译：

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使用新的分析模型加强震后的配电系统

这项研究强调，地震可能导致配电系统短路故障、停电和设备损坏。基于对土耳其发生的两次大地震（2023 年 2 月 6 日）影响的观察，本研究提出了一种加强配电系统抵御自然灾害的新分析模型。在该模型中，对配电系统进行了分析，并确定了公交车的脆弱性指数。利用脆弱性指标评估配电系统的技术状况，并对分布式发电（DG）和储能单元进行整合和规模调整，以确保地震后的能源连续性。该脆弱性指数既考虑了孤岛（微电网）模式下配电系统的运行，也考虑了其与主电网相连的运行。另外，利用分析模型范围内推荐的故障指标，分析配电系统短路故障的薄弱点，并在这些点限制短路故障电流。因此，通过所提出的分析模型可以增强配电系统抵御地震等自然灾害的能力。