海岛微电网建模与小信号稳定性分析

Modeling and Small Signal Stability Analysis of Island Microgrid

海岛微电网是解决偏远小型海岛联网供电困难的有效方法之一。本文针对海岛用电量小,昼夜用电量差别大,长期运行在孤岛模式下的特点,构建了小型微电网模型,并建模分析下垂系数和负载大小改变时对微电网小信号稳定的影响,通过仿真和计算得出使微电网获得最佳性能和稳定性的下垂系数,负载大小的最佳取值范围。

Island microgrid is one of the effective ways to solve the difficulty of power supply in remote and small island. In view of the island with a low power consumption, large power consumption difference between day and night, long-term operation in the islanded mode, the microgrid model is built, microgrid small signal stability is analysised when the droop coefficient and the load are changed. Through simulation and calculation, the optimum range of droop coefficient value and load size are worked out.