Vulnerability Assessments for Power-Electronics-Based Smart Grids

Zhang, Jinan; Ye, Jin; Guo, Lulu; Li, Fangyu; Song, Wenzhan

doi:10.1109/ecce44975.2020.9235420

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Vulnerability Assessments for Power-Electronics-Based Smart Grids

Zhang, Jinan·Ye, Jin·Guo, Lulu·Li, Fangyu·Song, Wenzhan

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Abstract

Here, in this paper, a novel method is proposed to evaluate the cyber security of the power-electronics-based smart grids (PESG). The proposed method considers the performance and stability of both the individual inverter and the grid. To our knowledge, this is a first attempt to evaluate the performance and stability of PESG due to cyber attacks. We first develop impedance-based modeling and cyber-attack modeling for PESG. Then we propose innovative two security criteria to evaluate the security of PESG, including stability-based and metrics-based. For metrics-based criteria, we propose to use both total harmonic distortion (THD) and space phasor model (SPM) to evaluate the inverter performance. The simulation results with a two-inverter-based power grid verify the validity and accuracy of the proposed security evaluation method. Results have shown that the performance and stability of PESG are significantly affected by cyber attacks, and thus there is indeed a need to further study cyber security issues of PESG.

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24 POWER TRANSMISSION AND DISTRIBUTION 97 MATHEMATICS AND COMPUTING PESG SPM THD cyber attacks impedance-based modeling stability

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Zhang, Jinan, Ye, Jin, Guo, Lulu, Li, Fangyu, Song, Wenzhan. 2020-10-11. Vulnerability Assessments for Power-Electronics-Based Smart Grids. https://doi.org/10.1109/ecce44975.2020.9235420

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