Biblio
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2021. Power Grid Nodal Vulnerability Analysis Combining Topology and State Information. 2021 IEEE 5th Conference on Energy Internet and Energy System Integration (EI2). :2546—2551.
The security of the power grid is the first element of its operation. This paper aims at finding the vulnerability nodes in the power grid to prevent it from being destroyed. A novel comprehensive vulnerability index is proposed to the singleness of evaluation indicators for existing literature by integrating the power grid's topology information and operating state. Taking IEEE-118 as an example, the simulation analysis proves that the proposed vulnerability index has certain discriminative advantages and the best weighting factor is obtained through correlation analysis.
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2018. Power Grid Security Improvement by Remedial Action Schemes Using Vulnerability Assessment Based on Fault Chains and Power Flow. 2018 IEEE International Conference on Probabilistic Methods Applied to Power Systems (PMAPS). :1-6.
The risk of large-scale blackouts and cascading failures in power grids can be due to vulnerable transmission lines and lack of proper remediation techniques after recognizing the first failure. In this paper, we assess the vulnerability of a system using fault chain theory and a power flow-based method, and calculate the probability of large-scale blackout. Further, we consider a Remedial Action Scheme (RAS) to reduce the vulnerability of the system and to harden the critical components against intentional attacks. To identify the most critical lines more efficiently, a new vulnerability index is presented. The effectiveness of the new index and the impact of the applied RAS is illustrated on the IEEE 14-bus test system.