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Study on dual characteristic of two kinds open phase running
Author(s): 
Pages: 14-17,64
Year: Issue:  23
Journal: Relay

Keyword:  非全相单相断线两相断线对偶性;
Abstract: 单相断线和两相断线是三相电网中最常见的两种故障,占纵向不对称故障的绝大多数.因此,分析纵向不对称故障是必要的,一方面要计算非全相运行时的负序分量和零序分量,另一方面要分析非全相运行的电气特点.通过对两种断线故障的分析,应用相分量法和对称分量法,绘制出其等效的复合序网图,计算出各相的相电流和相电压.这两种故障虽然断开形式不同,但二者的物理本质、内在规律,存在明显的相似性.将通过逐项对比分析,着重阐明二者的对偶性.
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