The rapidly drop of frequency in the microgrid (MG) system when it operates under island operation has caused frequency stability problems. In case, generators and renewable energy sources cannot supply enough power to restore the frequency, the load shedding will be proceeded. This paper proposes the load shedding method based on the coordinate multiple load shedding factors when the MG system operates in island mode. This proposed method carries out an approach through two main steps. Firstly, the optimal amount of load shedding power considering renewable energy sources and the ability to adjust the primary and secondary frequencies of the generator is calculated to restore the frequency to the allowed range. Next, distributing the optimal load shedding power for each bus is based on the combination of different criteria to meet the economic and technical goals. On the technical side, this paper also considers two criteria about the voltage distance, and the voltage sensitivity index. These two criteria contribute to reducing voltage drop and improving voltage stability when the microgrid operates in island mode. From the economic perspective, it considers the load importance factor, thereby minimizing the economic losses caused by load shedding. The AHP algorithm is applied in this paper to determine the importance of loads and the importance of the different criteria when they are combined. The effectiveness of the proposed method is demonstrated through simulation of IEEE 16-bus microgrid with 6-source.

微电网（MG）系统在孤岛运行时频率快速下降导致频率稳定性问题。如果发电机和可再生能源无法提供足够的电力来恢复频率，则将进行减载。提出了MG系统孤岛运行时基于协调多个减载因子的减载方法。该方法通过两个主要步骤来实现。首先，计算考虑可再生能源以及调节发电机一次和二次频率的能力的最佳减载功率，以将频率恢复到允许的范围。下一个，为每条母线分配最佳减载功率是基于不同标准的组合，以满足经济和技术目标。在技​​术方面，本文还考虑了电压距离和电压敏感指数两个标准。这两个标准有助于微电网孤岛运行时降低电压降、提高电压稳定性。从经济角度考虑负荷重要性因素，从而最大限度地减少甩负荷造成的经济损失。本文应用AHP算法来确定载荷的重要性以及不同准则组合时的重要性。通过对 IEEE 16 总线 6 源微电网的仿真验证了该方法的有效性。本文还考虑了关于电压距离和电压敏感指数的两个标准。这两个标准有助于微电网孤岛运行时降低电压降、提高电压稳定性。从经济角度考虑负荷重要性因素，从而最大限度地减少甩负荷造成的经济损失。本文应用AHP算法来确定载荷的重要性以及不同准则组合时的重要性。通过对 IEEE 16 总线 6 源微电网的仿真验证了该方法的有效性。本文还考虑了关于电压距离和电压敏感指数的两个标准。这两个标准有助于微电网孤岛运行时降低电压降、提高电压稳定性。从经济角度考虑负荷重要性因素，从而最大限度地减少甩负荷造成的经济损失。本文应用AHP算法来确定载荷的重要性以及不同准则组合时的重要性。通过对 IEEE 16 总线 6 源微电网的仿真验证了该方法的有效性。从经济角度考虑负荷重要性因素，从而最大限度地减少甩负荷造成的经济损失。本文应用AHP算法来确定载荷的重要性以及不同准则组合时的重要性。通过对 IEEE 16 总线 6 源微电网的仿真验证了该方法的有效性。从经济角度考虑负荷重要性因素，从而最大限度地减少甩负荷造成的经济损失。本文应用AHP算法来确定载荷的重要性以及不同准则组合时的重要性。通过对 IEEE 16 总线 6 源微电网的仿真验证了该方法的有效性。