Vulnerability Analysis of Power Communication Network
Bin Fan · Proceedings of the CSEE · 2014
The reliability of power communication network, which is the supporting network of smart grid, has been the prerequisite for economical and safe operation and intelligence of smart gird. As an effective measurement of network reliability, vulnerability can show the performance when a network is attacked or some network units fail. A vulnerability analysis method of power communication network on business layer based on the importance of the power businesses was proposed. To solve the problem of subjective uncertainty caused by experts grading method in traditional importance assessment of power businesses, a new method called feature index method was proposed, in which the scores based on the requirements on the objective indexes replace the ones of experts grading. Take business importance as the parameter of a network, a power communication network model on business layer was established. In the model, the network vulnerability was measured by the loss of business importance when some links had failed. The vulnerability was analyzed in four link failure modes, and the analyzing results showed that the network vulnerability is high under intentional attacks and the more concentrated the distribution of business importance on links is, the higher the vulnerability is. Based on the analysis, a method which can reduce the network vulnerability by changing routing strategy was given and applied to the study case. The simulation results verified the effectiveness of the method.