{"id":1568,"date":"2023-02-24T19:45:47","date_gmt":"2023-02-24T19:45:47","guid":{"rendered":"https:\/\/sbia.org.br\/lnlm\/?page_id=1568"},"modified":"2023-02-24T19:45:47","modified_gmt":"2023-02-24T19:45:47","slug":"vol21-no1-art7","status":"publish","type":"page","link":"https:\/\/sbia.org.br\/lnlm\/publicacoes\/vol21-no1\/vol21-no1-art7\/","title":{"rendered":"Development of a Low-Cost Relay Prototype for Real-Time Power Protection Functions"},"content":{"rendered":"<p>Pablo Rodrigues Lopes <a href=\"https:\/\/orcid.org\/0000-0002-2277-3333\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-1167\" src=\"https:\/\/sbia.org.br\/lnlm\/wp-content\/uploads\/sites\/4\/2020\/09\/orcid.jpg\" alt=\"orcid\" width=\"20\" height=\"20\" \/><\/a>&#038; Rui Bertho Junior <a href=\"https:\/\/orcid.org\/0000-0001-5526-3201\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-1167\" src=\"https:\/\/sbia.org.br\/lnlm\/wp-content\/uploads\/sites\/4\/2020\/09\/orcid.jpg\" alt=\"orcid\" width=\"20\" height=\"20\" \/><\/a><\/p>\n<p><strong>Abstract:<\/strong> This paper presents a Raspberry Pi 3B+ based low-cost universal relay able to run power protection functions in real-time. The configurations necessary for this single-board computer to be able to provide real-time response are shown, as for latency tests to verify its response time. An experimental circuit was built to send three-phase fault signals from a Relay tester to the low-cost relay, in order to evaluate its response time to clear faults in comparison to a commercial relay. A neural networks algorithm was developed and executed in real-time by the proposed low-cost relay, which is able to differentiate three-phase faults from transient signals created from large load variations. The results show that the low-cost relay is capable of running simple and complex protection functions within a pre-defined runtime and acceptable precision, compared to a commercial protection relay. However, the sampling frequency the low-cost relay is able to handle is limited. The results have also shown that the low-cost relay meet the requirements for a soft real-time system, which is not ideal for practical power protection systems that require hard real-time systems.<\/p>\n<p><strong>Keywords:<\/strong> Neural network, protection systems, raspberry pi 3, real-time systems, relays.<\/p>\n<p><strong>DOI code:<\/strong> <a href=\"http:\/\/dx.doi.org\/10.21528\/lnlm-vol21-no1-art7\">10.21528\/lnlm-vol21-no1-art7<\/a><\/p>\n<p><strong>PDF file:<\/strong> <a href=\"https:\/\/sbia.org.br\/lnlm\/wp-content\/uploads\/2023\/02\/vol21-no1-art7.pdf\">vol21-no1-art7.pdf<\/a><\/p>\n<p><strong>BibTex file:<\/strong> <a href=\"https:\/\/sbia.org.br\/lnlm\/wp-content\/uploads\/2023\/02\/vol21-no1-art7.bib\">vol21-no1-art7.bib<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Pablo Rodrigues Lopes &#038; Rui Bertho Junior Abstract: This paper presents a Raspberry Pi 3B+ based low-cost universal relay able to run power protection functions in real-time. The configurations necessary for this single-board computer to be able to provide real-time <a href=\"https:\/\/sbia.org.br\/lnlm\/publicacoes\/vol21-no1\/vol21-no1-art7\/\" class=\"read-more\">Read More &#8230;<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":1546,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-1568","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Development of a Low-Cost Relay Prototype for Real-Time Power Protection Functions - Learning and NonLinear Models<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/sbia.org.br\/lnlm\/publicacoes\/vol21-no1\/vol21-no1-art7\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Development of a Low-Cost Relay Prototype for Real-Time Power Protection Functions - Learning and NonLinear Models\" \/>\n<meta property=\"og:description\" content=\"Pablo Rodrigues Lopes &#038; Rui Bertho Junior Abstract: This paper presents a Raspberry Pi 3B+ based low-cost universal relay able to run power protection functions in real-time. 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