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Research of setting method of ground distance zone-Ⅲ protection for 110 kV transmission line
Author(s): 
Pages: 63-66
Year: Issue:  19
Journal: POWER SYSTEM PROTECTION AND CONTROL

Keyword:  接地距离Ⅲ段越级误动整定原则灵敏度可靠性;
Abstract: 通过一起110 kV线路接地距离Ⅲ段保护在线路末端变压器35 kV侧母线故障时越级误动事件的分析,提出接地距离Ⅲ段保护定值及时限在整定上的改进措施.使110 kV线路接地距离Ⅲ段保护定值和时限与相间距离Ⅲ段保护的定值及时限按照相同原则整定.既可以提高远后备灵敏度,同时加强了远后备对相邻电力设备安全性的保障.
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