基于復(fù)雜網(wǎng)絡(luò)理論的連鎖故障建模與預(yù)防研究
[Abstract]:Complex network cascading failure is a dynamic phenomenon that often occurs on the infrastructure network, especially in recent years, which has occurred in a complex power network, which has brought huge loss and influence to the social economy and people's life. Therefore, the analysis and prevention of complex grid linkage barrier has caused the power workers. In order to overcome the shortcomings of the traditional security analysis method which overly pays attention to the dynamic characteristics of the individual, the system theory and methods of system science and holism are provided to reveal the global dynamic behavior of the cascading failures. The complex network theory is one of the important branches of system science. It studies the close relationship between network structure and network function from the perspective of network topology. Based on the topology connection of complex grid, a corresponding topology model of power network is set up. The linkage fault model is analyzed to discuss the dynamic characteristics of the cascading failure in the power system, and then it is proposed that the chain fault prevention strategy of complex power grid is a powerful way to suppress the transmission of cascading failures in order to improve the security of the power system. The difference between the electrical characteristics and the importance of the node importance to the dynamic behavior of the complex network cascading failure is studied. The recognition algorithm of the important nodes of the complex grid and the modeling process of the cascading failures are studied, and the chain fault prevention model is further proposed. The research work of this thesis is as follows: 1, the topology characteristics of the complex power grid Analysis of the dynamic properties of the network based on the complex network theory is mainly from the nodes and sides that constitute the network skeleton and the influence of network topology on the network function. This method is different from the traditional power system analysis. Therefore, this paper focuses on the differences and relations between the two methods. The basic modeling method of complex grid is introduced and a complex network topology model is constructed. The topological statistical characteristics of complex power network and the complex relationship between the complex network and the dynamic behavior of the cascading failure.2, the research of the importance recognition algorithm for complex network nodes are studied. On the basis of it, a kind of important recognition algorithm for multi attribute nodes based on information entropy is proposed, and the evaluation index of node importance considering the electrical characteristics of complex power grid is established, and a kind of Gini coefficient is proposed. Multi attribute node importance recognition algorithm. Finally, through the simulation analysis in the IEEE-39 node system network, the feasibility and accuracy of the evaluation results of two kinds of complex grid node importance recognition algorithms proposed in this paper are compared and analyzed.3, the research of complex network cascading failure modeling. Transfer and recessive faults are the two main factors that trigger the cascading failures of the complex power grid. Therefore, this paper sets up the hidden chain fault probability model of the power system based on the topology of the complex network, the chain fault model under the electric load and the cascading failure model under the electric load of the recessive fault. The simulation research on EE-300 node system network analyzes the influence of the small world on the scale of the cascading failures and the relationship between the different load definition forms and the robustness of the cascading failures, and the research on the modeling of the complex network cascading failure prevention. Considering the dynamics of the complex network nodes, the linkage failure dynamics is considered. There is a close relationship between behavior, and a chain fault prevention model based on the corresponding node importance is established. The relationship between the cost reduction of network construction and the improvement of the complex network robustness is analyzed, and the optimal configuration of the complex network node capacity based on the evaluation results of different node importance is further discussed. The impact of the model on low cost and high robustness network is established.
【學(xué)位授予單位】:西南交通大學(xué)
【學(xué)位級別】:博士
【學(xué)位授予年份】:2014
【分類號】:TM73
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