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Does topological information matter for power grid vulnerability?

Min Ouyang1, Kun Yang1

  • 1Department of Systems Science and Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, China.

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Summary
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Understanding power grid vulnerability to attacks requires assessing information levels. Component physical properties and flow parameters information (CPI) is most critical for small attacks and cost-efficient strategies, highlighting its value in security decisions.

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Area of Science:

  • Electrical Engineering
  • Cybersecurity
  • Network Security

Background:

  • Power grids are critical infrastructure vulnerable to attacks.
  • Attacker strategies depend on the level of grid information available.
  • Assessing information value is crucial for enhancing power grid security.

Purpose of the Study:

  • To categorize power grid information levels relevant to attackers.
  • To identify attack strategies for each information level.
  • To quantify the value of different information types for vulnerability analysis.

Main Methods:

  • Classifying power grid information into four levels: no information, purely topological information (PTI), topological information with generator and load nodes (GLNI), and full information (component physical properties and flow parameters information - CPI).
  • Analyzing and comparing power grid vulnerability under different attack strategies.
  • Developing an approach to quantify the relative values of PTI, GLNI, and CPI.

Main Results:

  • Component physical properties and flow parameters information (CPI) is most critical for small attacks (p ≤ 0.1).
  • When considering attack costs and optimal cost-efficient intensity, CPI holds the largest cost-based information value.
  • Topological information's importance for power system vulnerability decisions is clarified.

Conclusions:

  • The value of information for power grid security varies significantly with attack type and cost.
  • CPI is paramount for both direct impact and cost-effective attacks.
  • Security strategies should prioritize the protection of detailed component and flow data.