距离保护第Ⅱ段整定新原则研究

Study on New Approach for Calculating Zone-2 Setting of Distance Protection

介绍了一种新的距离Ⅱ段的整定方法,该方法比传统的距离Ⅱ段保护的范围要大。为了进一步扩大距离Ⅱ段在相邻线路的保护范围,在此方法的基础上,增加在线识别系统运行方式的功能,构成了根据实时数据在线整定距离Ⅱ段的自适应原则,该方法在保证选择性的前提下,比前者有更大的保护范围。

A new setting method for distance zone-2 protection is introduced in this paper, which covers a higher percentage of remote line than the conventional distance zone-2 protection. In order to further enlarge the protective range, the function of on-line identification of system operation condition is added on the basis of the method. Thus ,the adaptive principle of distance zone-2 setting using real-time data is formed. On the condition that selectivity is guaranteed, the method has a greater protective range.