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| Identification Method of Key Nodes in Power System Based on Improved PageRank Algorithm |
| Li Changchao1, Kang Zhongjian1, Yu Hongguo1, Li Xin1, Zhao Bing2 |
1. College of Information and Control Engineering China University of Petroleum Qingdao 266580 China;
2. China Electric Power Research Institute Co. Ltd Beijing 100192 China |
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Abstract In order to identify the key nodes at the beginning of the power system fault, a recognition method of key nodes based on the improved PageRank algorithm is proposed. First, the sensitivity matrix of voltage reactive power and the sensitivity matrix of phase angle active power are obtained based on Jacobi matrix to define the link matrices under different indices of system. Secondly, considering the influence of power communication system on power network, the derived networks are defined based on the node contraction principle, and the link matrices are modified to get the network expansion matrices. Finally, the weight of system nodes are obtained based on the improved PageRank algorithm and the system nodes are sorted according to the weight values. The correctness of the method is verified on the simulation of IEEE39 bus system.
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Received: 31 May 2018
Published: 14 May 2019
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2019, Vol. 34 
