This paper proposes rooted tree to model DG island separation according to the radial structure and service restoration process of distribution system.
根据配电网的辐射状结构及故障恢复的特点，提出利用具有层次特性的根树对分布式发电孤岛划分问题建模。
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This can even happen for a small DG located on the secondary because of the voltage drop along the service drop, the secondary wiring, and the distribution transformer.