The chemisorption of gaseous carbon on PE can form a disordered graphitic layer responsible for the surface conductivity increase experimentally observed.<\/p>\n","protected":false},"author":93,"featured_media":0,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"tags":[1324,1402,1379],"targets":[1317],"pubblicazioni_tipologie":[773],"class_list":["post-198073","pubblicazioni","type-pubblicazioni","status-publish","hentry","tag-electricity-network-en","tag-partial-discharges","tag-technologies-and-components","targets-research","pubblicazioni_tipologie-isi-article-en"],"acf":{"dont_show_hompage":true,"projects":{"ID":188405,"post_author":"93","post_date":"2024-06-13 15:10:12","post_date_gmt":"2024-06-13 13:10:12","post_content":"","post_title":"Resilience and Security for Energy Systems","post_excerpt":"The goal of the project is to increase the security and resilience of the energy system in the face of greater environmental threats due to climate change, through the development of tools to support institutions and operators and the definition of an optimal set of actions to be adopted for this purpose.","post_status":"publish","comment_status":"open","ping_status":"closed","post_password":"","post_name":"resilience-and-security-for-energy-systems","to_ping":"","pinged":"","post_modified":"2024-07-02 10:30:30","post_modified_gmt":"2024-07-02 08:30:30","post_content_filtered":"","post_parent":0,"guid":"https:\/\/www.rse-web.it\/progetti\/resilience-and-security-for-energy-systems\/","menu_order":0,"post_type":"progetti","post_mime_type":"","comment_count":"0","filter":"raw"},"order_posts":"","dont_show_search":false,"related_posts":false,"show_on_slider":false,"single_post_data":{"titolo_spot":"","post_content":"
Polymeric insulation employed in electrical power industry undergo irreversible and unpredictable ageing due to partial discharges (PDs). In particular, the dielectric properties of polyethylene (PE) used in high voltage cables are often compromised by the formation of electrical trees.<\/p>\n
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In this work we assume that the propagation of treeing channels involves the injection of carbonic material into the gas interacting with the surface of the defect. Experimental characterizations proved that, in certain conditions, disordered graphitic carbon can form in some areas of the electrical trees, thus increasing surface conductivity and inhibiting PDs.<\/p>\n
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The chemical mechanism involved in this process is yet to be clarified. Here we propose a model for this process. By means of a series of molecular dynamics simulations, we show how the chemisorption of gaseous molecules on a PE surface can lead to a bidimensional carbonic structure.<\/p>\n
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The characterization of the density of states of such systems suggests that the presence of pure carbon adsorbed on the polymer causes an increase in surface conductivity.<\/p>\n","scarica_file":false,"link_estreno":[{"link_text":"Download Publication","link":"https:\/\/iopscience.iop.org\/article\/10.1088\/1361-651X\/acac44"}],"button":{"text":"","link":""},"referente_group":false,"data_emissione":"2023-02-06","autori":"G. Buccella, A. Villa, L. Barbieri, R. Malgesini, D. Palladini (RSE S.p.A.), D. Ceresoli (CNR-SCITEC), R. Schurch (Universidad Tecnica Federico Santa Maria) ","destinazione":"IOP Publishing - Modelling and Simulation in Materials Science and Engineering, Vol. 31, N. 3","rif_rse":"23000951"},"satellite_post_url":""},"yoast_head":"\n