This paper proposes a load shedding model for the island microgrid based on the ranking of loads and the power stability index (PSI). Loads are ranked based on the improved analytic hierarchy process (AHP) algorithm. Real-time measurement systems have the function of collecting data for very important, important, and less-important loads at each bus load. From this data, the improved AHP method is applied to rank the loads. The advantage of this method is that the subjectivity is eliminated and not depending on the expertise of the system operator when implementing the traditional AHP method. Besides, the minimum amount of load shedding power is calculated, taking into account both primary and secondary control methods. The objective is to minimize the impact on power consumers and ensure that the frequency returns to an acceptable range. In addition, when implementing load shedding, voltage quality, and stability are considered. The PSI serves as a crucial parameter for assessing the voltage stability of microgrid buses. This index is combined with load ranking weights to obtain combined weights for the load shedding plan. Consequently, the proposed load shedding plan prioritizes minimizing damage to customers, improving voltage quality and stability, and ensuring frequency is within permissible limits. The 16-bus microgrid system is applied to compare with traditional methods and to prove the efficiency of the suggested technique.

中文翻译：

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考虑改进的层次分析过程算法和功率稳定指数优化微电网的排序和减载

本文提出了一种基于负荷排序和功率稳定指数（PSI）的海岛微电网减载模型。基于改进的层次分析法（AHP）算法对负载进行排序。实时测量系统具有在每个总线负载处收集非常重要、重要和不太重要负载的数据的功能。根据该数据，应用改进的 AHP 方法对负载进行排序。该方法的优点是消除了传统AHP方法实施时的主观性，不依赖于系统操作人员的专业知识。此外，还考虑了初级和次级控制方法，计算了最小减载功率。目标是尽量减少对电力消费者的影响，并确保频率恢复到可接受的范围。此外，在实施减载时，还要考虑电压质量和稳定性。PSI是评估微电网母线电压稳定性的关键参数。该指标与负荷排序权重相结合，得到减负荷方案的综合权重。因此，拟议的减载计划优先考虑最大限度地减少对客户的损害，提高电压质量和稳定性，并确保频率在允许的范围内。应用 16 总线微电网系统与传统方法进行比较，并证明所建议技术的效率。