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Power information systems and physical systems are gradually being coupled and developed into power cyber\u2013physical systems (CPS). A number of blackouts in recent years have shown that cyberspace cyber attacks on CPS can lead to the intensification and rapid spread of faults in the physical space of the power grid, and even system collapse. Aiming at the difficulty of analyzing the evolution of cyber\u2013physical cross\u2010space impacts of cyber\u2010attacks, this paper proposes a cross\u2010domain propagation impact assessment method that considers cyber\u2013physical coupling risks caused by attacks. First, according to the multiple coupling relationship between the power system information space and physical space, the monitoring function model and the control function model are established. Second, under the effect of high\u2010concealment attack, analyze the impact of the risk caused by its failure after it is transmitted to the physical space with different propagation probabilities. Finally, the experimental verification was carried out using the IEEE RTS79 standard test system. The simulation results show that the proposed method can comprehensively consider the cyber\u2013physical energy supply coupling relationship, the risk propagation probability, and the operating characteristics of the information system, and effectively quantify and evaluate the impact of information space network attacks on the physical space entity power grid. It further reveals the objective law that information space risks can evolve and spread across domains under the condition of strong coupling of information physics.<\/jats:p>","DOI":"10.1049\/2023\/9006166","type":"journal-article","created":{"date-parts":[[2023,10,25]],"date-time":"2023-10-25T11:06:18Z","timestamp":1698231978000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Cross\u2010Space Conduction Assessment Method of Network Attack Risk under the Strong Coupling Characteristics of Electric Power Cyber Physics"],"prefix":"10.1049","volume":"2023","author":[{"ORCID":"https:\/\/orcid.org\/0009-0007-5336-5029","authenticated-orcid":false,"given":"Shenjian","family":"Qiu","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jiaxuan","family":"Fei","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jian","family":"Wang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"265","published-online":{"date-parts":[[2023,10,25]]},"reference":[{"key":"e_1_2_9_1_2","doi-asserted-by":"publisher","DOI":"10.1109\/TSG.2014.2302476"},{"key":"e_1_2_9_2_2","doi-asserted-by":"publisher","DOI":"10.1109\/TSG.2022.3199187"},{"key":"e_1_2_9_3_2","first-page":"5486","article-title":"Modeling and vulnerability analysis of electric cyber physical system considering topological correlation and double coupling","volume":"41","author":"Zhang Y.","year":"2021","journal-title":"Proceedings of the Chinese Society of Electrical and Electronics Engineers"},{"key":"e_1_2_9_4_2","doi-asserted-by":"publisher","DOI":"10.1109\/TSG.2014.2387381"},{"key":"e_1_2_9_5_2","doi-asserted-by":"publisher","DOI":"10.1109\/TIFS.2022.3210864"},{"key":"e_1_2_9_6_2","first-page":"167","article-title":"Analysis and lessons of the blackout in Indian power grid on July 30 and 31","volume":"32","author":"Tang Y.","year":"2012","journal-title":"Zhongguo Dianji Gongcheng Xuebao"},{"key":"e_1_2_9_7_2","first-page":"144","article-title":"Coordinated cyber-attack: inference and thinking of incident on Ukrainian power grid","volume":"40","author":"Liu N.","year":"2016","journal-title":"Automation of Electric Power Systems"},{"key":"e_1_2_9_8_2","doi-asserted-by":"crossref","unstructured":"LuK.-D.andWuZ.-G. 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