关键词: 孤岛划分, 分布式能量源, 两阶段划分, 电能质量, 遗传算法

Abstract: This paper proposes a two-stage selection scheme to deal with the problem that there may be several optimal solutions in the islanding partition of distribution system with distribution generations. This scheme utilizes the genetic algorithm to obtain the alternative population through the priority optimization; the optimal solution is selected from the alternative population based on the power quality index. The simulation implemented on American PG&E 69-node distribution system demonstrates that the possibility of generating the islands with low power quality is reduced by 45%. The case study shows that the two-stage islanding partition scheme proposed can decrease the possibility of generating the islands with low power quality significantly.

Key words: islanding partition, distributed energy resource, two-stage partition, power quality, genetic algorithm