Power system fragile line assessment method and system considering network attack risks

Abstract

The invention discloses a power system fragile line assessment method and system considering network attack risks, fully considers an influence mechanism of network attacks on line vulnerability and a cascading process of line faults, and provides the power system fragile line assessment method considering the network attack risks. According to the method, the potential maximum power flow of the line under the network attack is calculated, and comprehensive risk assessment is performed by using the line fault concealment index and the minimum load shedding capacity, so that screening and risk sorting of the high-risk line are realized, and the defect that a current assessment method does not consider network attack threats and network attack physical consequences is overcome.

Description

technical field [0001] The invention relates to the technical field of power systems, in particular to a method and system for evaluating vulnerable lines in power systems considering the risk of network attacks. Background technique [0002] The vulnerability of power system lines is crucial to the safe and stable operation of the power grid. The tripping of key lines will cause a large number of power transfers, which will cause cascading failures and lead to blackouts. In recent years, many major power outages in countries around the world are caused by chain failures caused by key line failures. With the high integration of information technology in the power system, the security of power lines is facing more and more cyber threats. Existing studies have shown that attackers can maliciously tamper with telemetry and telemetry traffic transmitted remotely, inducing wrong decision-making in the control center, causing circuit overload and tripping. [0003] However, the ...

AI Technical Summary

Problems solved by technology

Existing studies have shown that attackers can maliciously tamper with telemetry and telemetry traffic transmitted remotely, inducing wrong decision-making in the control center, causing circuit overload and tripping

[0003] However, the existing vulnerable line assessment methods only consider the impact of the line on the safe and stable operation of the system in the case of random faults or physical attacks, lack of in-depth analysis of network attack threats, and have not established a line vulnerability assessment model under network threats , it is difficult to reflect the vulnerability of the line to network attacks

Most of the traditional power line vulnerability assessment methods fail to fully consider the fault propagation mechanism caused by malicious data attacks and the correlation analysis model of "network attack-physical consequences", which makes their assessment methods unable to adapt to the line vulnerability assessment under network threats

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