Identifying key nodes in the power system considering node properties

Identifying the key nodes is very important to guarantee the safe and stable operation of power system. This paper proposes a method to identify the key nodes based on the sensitivity and improved PageRank algorithm,. Firstly, in order to make the identification method adapt to the power system, the reactive power sensibility to voltage and active power sensibility to phase angle are redefined and used to improve PageRank algorithm. The link matrix and network topology of power network are set up by the definition of sensibility criterion. Secondly, in order to accurately assess the importance of nodes, the influence of power communication system on power grid is considered when the importance of nodes are evaluated. At the same time, the network topology and link matrix are corrected. The derived network and the network expansion matrix are defined. Finally, the correctness of the method is verified by the simulation of IEEE30 bus system.Identifying the key nodes is very important to guarantee the safe and stable operation of power system. This paper proposes a method to identify the key nodes based on the sensitivity and improved PageRank algorithm,. Firstly, in order to make the identification method adapt to the power system, the reactive power sensibility to voltage and active power sensibility to phase angle are redefined and used to improve PageRank algorithm. The link matrix and network topology of power network are set up by the definition of sensibility criterion. Secondly, in order to accurately assess the importance of nodes, the influence of power communication system on power grid is considered when the importance of nodes are evaluated. At the same time, the network topology and link matrix are corrected. The derived network and the network expansion matrix are defined. Finally, the correctness of the method is verified by the simulation of IEEE30 bus system.

[1]  Chang-Hyun Park,et al.  Systematic Method to Identify an Area of Vulnerability to Voltage Sags , 2017, IEEE Transactions on Power Delivery.

[2]  Canbing Li,et al.  Fractal Characteristics Analysis of Blackouts in Interconnected Power Grid , 2018, IEEE Transactions on Power Systems.

[3]  Lin Xu,et al.  Equivalent Admittance Small-World Model for Power System - II. Electric Betweenness and Vulnerable Line Identification , 2009, 2009 Asia-Pacific Power and Energy Engineering Conference.

[4]  Jun Yan,et al.  Cascading Failure Analysis With DC Power Flow Model and Transient Stability Analysis , 2015, IEEE Transactions on Power Systems.

[5]  Yingrui Zhang,et al.  Attack Vulnerability of Power Systems Under an Equal Load Redistribution Model , 2018, IEEE/ACM Transactions on Networking.

[6]  Chandan Kumar Chanda,et al.  Analysis of Vulnerability indices of power grid integrated DG units based on Complex Network theory , 2015, 2015 Annual IEEE India Conference (INDICON).

[7]  JESUS BEYZA,et al.  Vulnerability Assessment of a Large Electrical Grid by New Graph Theory Approach , 2018, IEEE Latin America Transactions.

[8]  Amy Nicole Langville,et al.  Google's PageRank and beyond - the science of search engine rankings , 2006 .

[9]  Haibo He,et al.  Q-Learning-Based Vulnerability Analysis of Smart Grid Against Sequential Topology Attacks , 2017, IEEE Transactions on Information Forensics and Security.

[10]  Bin Liu,et al.  Recognition and Vulnerability Analysis of Key Nodes in Power Grid Based on Complex Network Centrality , 2018, IEEE Transactions on Circuits and Systems II: Express Briefs.

[11]  Siliang Jian.  Research and simulation of control strategy for multi-terminal flexible high-voltage DC transmission system with renewable energy access , 2017 .

[12]  Yong Tang,et al.  Analysis and recommendations for the adaptability of China's power system security and stability relevant standards , 2017 .

[13]  Guanghui Hua,et al.  Quantitative method to pre-assess vulnerability for microgrid based on probability theory , 2009 .

[14]  I. Kamwa,et al.  Causes of the 2003 major grid blackouts in North America and Europe, and recommended means to improve system dynamic performance , 2005, IEEE Transactions on Power Systems.

[15]  Yasser Abdel-Rady I. Mohamed,et al.  Dynamics and Robust Control of a Grid-Connected VSC in Multiterminal DC Grids Considering the Instantaneous Power of DC- and AC-Side Filters and DC Grid Uncertainty , 2016, IEEE Transactions on Power Electronics.