摘要
为了提高继电保护定值在线校核效率,提出一种依据计算保护重要度来判断支路保护装置重要程度的在线校核新方法。该方法将一条支路的所有保护装置作为一个整体,从电网事故后果严重性的角度提出了一种确定支路保护装置重要度的方法,采用负荷孤立、发电机孤立和潮流过载作为支路保护装置重要度的辨识依据,计算出各支路保护装置重要度指标,根据指标的降序来进行保护装置的在线校核。对IEEE 10机39节点系统进行仿真计算并分析了计算结果,验证了该方法的合理性和正确性。
In order to improve the on-line calibration efficiency of relay protection, the paper proposes an on-line calibration assessment method based on protection importance to judge the importance degree of protection device. The method takes all of protection devices for a line as a whole, determines the importance degree of the protection device for a line in the view of the consequences of the grid failure, calculates the importance index of each branch circuit protection device based on the load isolation, generator isolation and overload of transmission line, and carries out the on-line verification of the relay protection according to the descending order of the indexes. The paper conducts a simulation calculation by using IEEE 10 machines and 39-node system, and the results show that the method is of reasonability and correctness.
出处
《陕西电力》
2016年第1期73-77,共5页
Shanxi Electric Power
关键词
负荷孤立
发电机孤立
潮流过载
在线校核
重要度指标
支路保护装置
load isolation
generator isolation
transmission line overload
on-line verification
importance index
branch lineprotection device
