基于传输贡献度的继电保护定值在线校核评估方法

On-line Verification Assessment of Relay Protection Setting Value Based on Transmission Contribution Degree

为了提高继电保护定值在线校核的效率,提出了一种基于传输贡献度判断支路保护装置重要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整体,从电网结构性的角度提出了一种确定支路保护装置重要度的方法,采用网络最大流和复杂网络理论,把传输贡献度作为支路保护装置重要度的辨识依据,从而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,验证了所述方法的合理性和正确性。

In order to improve the efficiency of on-line verification of relay protection setting value, a new on-line veri- fication method based on the transmission contribution degree is proposed to judge the importance degree of branch protection device in this paper. All protection devices of one branch line are treated as a whole in this method. Then a method is proposed to determine the importance degree of the branch protection device in terms of the grid structure. With the network maximum flow and complex network theory applied, and with the transmission contribution degree taken as the identification basis of branch protection device importance degree, the importance index of each branch protection device is calculated, and the on-line verification of protection device is made in accordance with the de- scending order of the indexes. The 39-node system of IEEE 10 machine is simulated and calculated, and the results verify the reasonableness and correctness of the proposed method.