{"id":33387,"date":"2019-10-31T21:52:18","date_gmt":"2019-10-31T18:52:18","guid":{"rendered":"https:\/\/prohoster.info\/blog\/sistema-dugovoj-zashhity-s-vozmozhnostyu-srabatyvaniya-po-tokovomu-signalu\/"},"modified":"2019-10-31T21:52:18","modified_gmt":"2019-10-31T18:52:18","slug":"sistema-dugovoj-zashhity-s-vozmozhnostyu-srabatyvaniya-po-tokovomu-signalu","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sq\/blog\/novosti-interneta\/sistema-dugovoj-zashhity-s-vozmozhnostyu-srabatyvaniya-po-tokovomu-signalu","title":{"rendered":"Sistemi i mbrojtjes me arka, me mund\u00ebsin\u00eb e aktivizimit nga sinjali i rrym\u00ebs","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><img decoding=\"async\" alt=\"Sistemi i mbrojtjes me arka, me mund\u00ebsin\u00eb e aktivizimit nga sinjali i rrym\u00ebs\" src=\"\/wp-content\/uploads\/2019\/05\/07bfb9a07736ce2f9f9d17ef429b1d67.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nN\u00eb kuptimin klasik, mbrojtja nga harku n\u00eb Rusi \u00ebsht\u00eb nj\u00eb mbrojtje e shpejt\u00eb nga shkurtimi, e bazuar n\u00eb regjistrimin e spektrit t\u00eb drit\u00ebs nga harku elektrik i hapur n\u00eb KRU. Metoda m\u00eb e zakonshme e regjistrimit t\u00eb spektrit t\u00eb drit\u00ebs \u00ebsht\u00eb p\u00ebrmes sensor\u00ebve optik\u00eb me fibra, e cila p\u00ebrdoret kryesisht n\u00eb sektorin industrial. Megjithat\u00eb, me shfaqjen e produkteve t\u00eb reja n\u00eb fush\u00ebn e mbrojtjes nga harku n\u00eb sektorin e banesave, si\u00e7 jan\u00eb modulat AFDD q\u00eb punojn\u00eb me sinjalin e rrym\u00ebs, t\u00eb cilat lejojn\u00eb vendosjen e mbrojtjes nga harku n\u00eb linjat e daljes, duke p\u00ebrfshir\u00eb kutit\u00eb ndar\u00ebse, kabllot, lidhjet, prizat etj., interesi p\u00ebr k\u00ebt\u00eb tem\u00eb po rritet.<br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><br \/>\n<img decoding=\"async\" alt=\"Sistemi i mbrojtjes me arka, me mund\u00ebsin\u00eb e aktivizimit nga sinjali i rrym\u00ebs\" src=\"\/wp-content\/uploads\/2019\/05\/f35ab8d139903844857910e809d4c981.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nMegjithat\u00eb, prodhuesit nuk shp\u00ebrndajn\u00eb shum\u00eb informacione p\u00ebr struktur\u00ebn e detajuar dhe t\u00eb holl\u00ebsishme t\u00eb produkteve modulare (n\u00ebse dikush ka informacione t\u00eb tilla, do t\u00eb isha shum\u00eb i lumtur p\u00ebr lidhjet n\u00eb burimet e k\u00ebsaj informacioni). N\u00eb an\u00ebn tjet\u00ebr, sistemet e mbrojtjes nga harku p\u00ebr sektorin industrial ofrojn\u00eb nj\u00eb manual p\u00ebrdoruesi prej 122 faqesh, ku shpjegohet n\u00eb detaje principi i funksionimit.<\/p>\n<p>Le t\u00eb shqyrtojm\u00eb sistemin e mbrojtjes nga harku VAMP 321 nga Schneider Electric, i cili p\u00ebrfshin t\u00eb gjitha funksionet e mbrojtjes nga harku, si\u00e7 jan\u00eb mbingarkesa dhe kontrolli i pranish\u00ebm t\u00eb harkut.<\/p>\n<p><img decoding=\"async\" alt=\"Sistemi i mbrojtjes me arka, me mund\u00ebsin\u00eb e aktivizimit nga sinjali i rrym\u00ebs\" src=\"\/wp-content\/uploads\/2019\/05\/1f41efdf7c3b6db7c38b4901a2954927.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<h3>Funksionaliteti<\/h3>\n<p><\/p>\n<ul>\n<li>Kontrolli i rrjedh\u00ebs n\u00eb tri faza.<\/li>\n<li>Rrjedha e sekuenc\u00ebs zero.<\/li>\n<li>D\u00ebshmira t\u00eb ngjarjeve, regjistrimi i m\u00ebnyrave emergjente.<\/li>\n<li>Aktivizimi ose nj\u00ebkoh\u00ebsisht sipas rrjedh\u00ebs dhe drit\u00ebs, ose vet\u00ebm nga drita, ose vet\u00ebm nga rrjedha.<\/li>\n<li>Koha e aktivizimit t\u00eb daljes me rel\u00e8 mekanik \u00ebsht\u00eb m\u00eb pak se 7 ms, me kart\u00ebn IGBT opsionale koha e aktivizimit zvog\u00eblohet n\u00eb 1 ms.<\/li>\n<li>Zona t\u00eb konfigurueshme p\u00ebr aktivizim.<\/li>\n<li>Sistem i vazhduesh\u00ebm i vet\u00ebkontrollit.<\/li>\n<li>Dispositivi mund t\u00eb p\u00ebrdoret n\u00eb sisteme t\u00eb ndryshme t\u00eb mbrojtjes nga harku p\u00ebr rrjetet e shp\u00ebrndarjes s\u00eb tensionit t\u00eb ul\u00ebt dhe mes\u00ebm.<\/li>\n<li>Sistemi i zbulimit t\u00eb shp\u00ebrthyesve t\u00eb harkut dhe mbrojtjes nga harku mat rrjedh\u00ebn e shkarkes\u00ebs dhe sinjalet p\u00ebrmes kanaleve t\u00eb sensor\u00ebve t\u00eb harkut dhe n\u00eb rastin e shkarkes\u00ebs minimizon koh\u00ebn e djegies duke shky\u00e7ur shpejt furnizimin me rrjedh\u00eb q\u00eb ushqen harkun.<\/li>\n<\/ul>\n<p><\/p>\n<h3>Parimi i korrelacionit t\u00eb matricave<\/h3>\n<p>\nKur jan\u00eb vendosur kushtet p\u00ebr aktivizimin e nj\u00eb shkalle specifike t\u00eb mbrojtjes nga harku, aplikohet mbledhja logjike n\u00eb daljet e matricave t\u00eb drit\u00ebs dhe rrjedh\u00ebs.<\/p>\n<p>N\u00ebse shkalla e mbrojtjes \u00ebsht\u00eb zgjedhur n\u00eb vet\u00ebm nj\u00eb matric\u00eb, ajo funksionon ose n\u00eb kushtin e aktualeve ose n\u00eb at\u00eb t\u00eb drit\u00ebs, k\u00ebshtu q\u00eb sistemi mund t\u00eb konfigurohet p\u00ebr t\u00eb punuar vet\u00ebm n\u00eb baz\u00eb t\u00eb sinjalit t\u00eb aktualeve.<\/p>\n<h3>Sinjalet q\u00eb jan\u00eb t\u00eb disponueshme p\u00ebr mbik\u00ebqyrje gjat\u00eb programimit t\u00eb shkall\u00ebve t\u00eb mbrojtjes:<\/h3>\n<p><\/p>\n<ul>\n<li>Aktualet n\u00eb faza.<\/li>\n<li>Rrjedha e sekuenc\u00ebs zero.<\/li>\n<li>Tensionet lineare.<\/li>\n<li>Tensionet fazore.<\/li>\n<li>Tensioni i sekuenc\u00ebs zero.<\/li>\n<li>Frekuenca.<\/li>\n<li>Shuma e aktor\u00ebve fazor\u00eb.<\/li>\n<li>Aktuali i sekuenc\u00ebs s\u00eb drejtp\u00ebrdrejt\u00eb.<\/li>\n<li>Aktuali i sekuenc\u00ebs s\u00eb kund\u00ebrt.<\/li>\n<li>Vlera relative e aktualit t\u00eb sekuenc\u00ebs s\u00eb kund\u00ebrt.<\/li>\n<li>Marr\u00ebdh\u00ebnia e aktualeve t\u00eb sekuenc\u00ebs s\u00eb kund\u00ebrt dhe t\u00eb sekuenc\u00ebs zero.<\/li>\n<li>Tensioni i sekuenc\u00ebs s\u00eb drejtp\u00ebrdrejt\u00eb.<\/li>\n<li>Tensioni i sekuenc\u00ebs s\u00eb kund\u00ebrt.<\/li>\n<li>Vlera relative e tensionit t\u00eb sekuenc\u00ebs s\u00eb kund\u00ebrt.<\/li>\n<li>Vlera mesatare e aktualit n\u00eb faza (IL1+IL2+IL3)\/3.<\/li>\n<li>Vlera mesatare e tensionit UL1,UL2,UL3.<\/li>\n<li>Vlera mesatare e tensionit U12,U23,U32.<\/li>\n<li>Koefficienti i deformimeve jo lineare IL1.<\/li>\n<li>Koefficienti i deformimeve jo lineare IL2.<\/li>\n<li>Koefficienti i deformimeve jo lineare IL3.<\/li>\n<li>Koefficienti i deformimeve jo lineare Ua.<\/li>\n<li>Vlera mesatare katrore IL1.<\/li>\n<li>Vlera mesatare katrore IL2.<\/li>\n<li>Vlera mesatare katrore IL3.<\/li>\n<li>Vlera minimale IL1, IL2, IL3.<\/li>\n<li>Vlera maksimale IL1, IL2, IL3.<\/li>\n<li>Vlera minimale U12, U23, U32.<\/li>\n<li>Vlera maksimale U12, U23, U32.<\/li>\n<li>Vlera minimale UL1, UL2, UL3.<\/li>\n<li>Vlera maksimale UL1, UL2, UL3.<\/li>\n<li>Vlera e sfondit Uo.<\/li>\n<li>Vlera e mesatareve katrore I\u043e.<\/li>\n<\/ul>\n<p><\/p>\n<h3>Regjistrimi i modaliteteve t\u00eb emergjenc\u00ebs.<\/h3>\n<p>\nRegjistrimi i modaliteteve t\u00eb emergjenc\u00ebs mund t\u00eb p\u00ebrdoret p\u00ebr t\u00eb ruajtur t\u00eb gjitha sinjalet e matjes (rrjedhat, tensionet, informacionin mbi gjendjet e hyrjeve dhe daljeve dixhitale). Hyrjet dixhitale gjithashtu p\u00ebrfshijn\u00eb sinjalet e mbrojtjes nga harku.<\/p>\n<h3>Fillimi i regjistrimit.<\/h3>\n<p>\nRegjistrimi mund t\u00eb fillohet nga aktivizimi i ndonj\u00eb niveli mbrojtjeje apo ndonj\u00eb hyrje dixhitale. Sinjali i fillimit zgjidhet n\u00eb matric\u00ebn e sinjaleve dal\u00ebse (sinjali vertikal DR). Gjithashtu, regjistrimi mund t\u00eb fillohet manualisht.<\/p>\n<h3>Kontrolli i vet\u00eb.<\/h3>\n<p>\nMemoria energjis\u00eb q\u00eb nuk humbet e pajisjes \u00ebsht\u00eb realizuar duke p\u00ebrdorur nj\u00eb kondensator me kapacitet t\u00eb madh dhe memorie operative me konsum t\u00eb ul\u00ebt energjie.<\/p>\n<p>Kur burimi i energjis\u00eb shtes\u00eb \u00ebsht\u00eb i aktivizuar, kondensatori dhe memoria e p\u00ebrkohshme furnizohen nga burimi i brendsh\u00ebm. Kur burimi i energjis\u00eb \u00ebsht\u00eb i \u00e7aktivizuar, memoria e p\u00ebrkohshme fillon t\u00eb marr\u00eb energji nga kondensatori. Ajo do t\u00eb mbaj\u00eb informacionin deri sa kondensatori t\u00eb jet\u00eb n\u00eb gjendje t\u00eb mbaj\u00eb tensionin e pranuesh\u00ebm. P\u00ebr nj\u00eb ambient me temperatur\u00eb +25\u00b0C, koha e funksionimit do t\u00eb jet\u00eb 7 dit\u00eb (lag\u00ebshtia e lart\u00eb e zvog\u00eblon k\u00ebt\u00eb parametrin).<\/p>\n<p>Memoria e p\u00ebrkohshme pa energji sh\u00ebrben p\u00ebr ruajtjen e regjistrimeve p\u00ebr modelet e emergjenc\u00ebs dhe ditarin e ngjarjeve.<\/p>\n<p>Funksionet e mikroprocesorit dhe integriteti i kabllove t\u00eb lidhura me t\u00eb, s\u00eb bashku me sakt\u00ebsin\u00eb e software-it, kontrollohen nga nj\u00eb rrjet i ve\u00e7ant\u00eb vet\u00ebkontrolli. P\u00ebrve\u00e7 kontrollit, kjo rrjet p\u00ebrpiqet t\u00eb rindez\u00eb mikroprocesorin n\u00eb rast defekti. N\u00ebse rindezja d\u00ebshton, pajisja e vet\u00ebkontrollit d\u00ebrgon nj\u00eb sinjal p\u00ebr t\u00eb filluar shfaqjen e nj\u00eb d\u00ebmtimi t\u00eb p\u00ebrhersh\u00ebm t\u00eb brendsh\u00ebm.<\/p>\n<p>N\u00eb rast se pajisja e vet\u00ebkontrollit zb discovers nj\u00eb d\u00ebm t\u00eb vazhduesh\u00ebm, ajo bllokon rele t\u00eb tjera dal\u00ebse (p\u00ebrve\u00e7 releut dal\u00ebs p\u00ebr funksionin e vet\u00ebkontrollit dhe releve t\u00eb dal\u00ebs, q\u00eb p\u00ebrdoren nga mbrojtja ndaj arkave).<\/p>\n<p>Po ashtu, kontrollohet burimi i brendsh\u00ebm i energjis\u00eb. N\u00eb rast mungese t\u00eb furnizimit t\u00eb jasht\u00ebm, d\u00ebrgohet automatikisht nj\u00eb sinjal alarmi. Kjo do t\u00eb thot\u00eb se releu dal\u00ebs p\u00ebr d\u00ebm t\u00eb brendsh\u00ebm \u00ebsht\u00eb n\u00ebn tension, n\u00ebse burimi shtes\u00eb i energjis\u00eb \u00ebsht\u00eb i aktivizuar dhe nuk jan\u00eb zbuluar d\u00ebme t\u00eb brendshme.<\/p>\n<p>Kryhet kontrolli i nj\u00ebsi qendrore, pajisjeve t\u00eb hyrjes\/daljes dhe sensor\u00ebve.<\/p>\n<h3>Kryerja e matjeve t\u00eb p\u00ebrdorura p\u00ebr funksionin e mbrojtjes nga arkat.<\/h3>\n<p>\nMatjet e rrjedh\u00ebs n\u00eb tri faza dhe rrjedh\u00ebs s\u00eb shkarkimit n\u00eb tok\u00eb p\u00ebr mbrojtjen ndaj arkave kryhen nga elektronika. Elektronika krahasohet nivelet e rrjedh\u00ebs me vlerat kufitare t\u00eb reagimit dhe l\u00ebshon sinjalet binare \u201cI&gt;&gt;\u201d ose \u201cIo&gt;&gt;\u201d p\u00ebr funksionin e mbrojtjes ndaj arkave n\u00eb rast se kufiri tejkalohet. T\u00eb gjitha p\u00ebrb\u00ebr\u00ebsit e rrjedh\u00ebs merren parasysh.<\/p>\n<p>Sinjalet \u201cI&gt;&gt;\u201d dhe \u201cIo&gt;&gt;\u201d lidhen me \u00e7ipin FPGA, i cili realizon funksionin e mbrojtjes nga harku. Sakt\u00ebsia e matjes p\u00ebr mbrojtjen nga harku \u00ebsht\u00eb \u00b1 15% n\u00eb 50Hz.<\/p>\n<p><img decoding=\"async\" alt=\"Sistemi i mbrojtjes me arka, me mund\u00ebsin\u00eb e aktivizimit nga sinjali i rrym\u00ebs\" src=\"\/wp-content\/uploads\/2019\/05\/c1f12088f2d6f4f00acaadac09a254cb.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<h3>Harmonik\u00ebt dhe gjith\u00e7ka jasht\u00eb sinusoidale (THD)<\/h3>\n<p>\nDispositivi e llogarit THD si p\u00ebrqindje e rrymave dhe tensioneve n\u00eb frekuenc\u00ebn kryesore.<\/p>\n<p>Merren parasysh harmonik\u00ebt nga 2-ta deri n\u00eb 15-t\u00ebn p\u00ebr rrymat dhe tensionet fazore. (Harmonica e 17-t\u00eb do t\u00eb merret pjes\u00ebrisht n\u00eb konsiderat\u00eb n\u00eb vler\u00ebn e harmonik\u00ebs s\u00eb 15-t\u00eb. Kjo ndodh p\u00ebr shkak t\u00eb parimeve t\u00eb matjes dixhitale.)<\/p>\n<h3>Modet e matjes s\u00eb tensionit<\/h3>\n<p>\nN\u00eb var\u00ebsi t\u00eb llojit t\u00eb aplikimit dhe transformator\u00ebve t\u00eb rrym\u00ebs n\u00eb dispozicion, dispozitivi mund t\u00eb lidhet ose me tensionin e sekuenc\u00ebs zero, tensionin linear ose fazor. Parametri i rregulluesh\u00ebm \u201cRehimi i matjes s\u00eb tensionit\u201d duhet t\u00eb vendoset n\u00eb p\u00ebrputhje me lidhjen e p\u00ebrdorur.<\/p>\n<h3>Modet e disponueshme:<\/h3>\n<p><\/p>\n<h3>\u201cU0\u201d<\/h3>\n<p>\nDispositivi \u00ebsht\u00eb i lidhur me tensionin e sekuenc\u00ebs zero. Mbrojtja e drejtuar nga shkarkimi n\u00eb tok\u00eb \u00ebsht\u00eb e disponueshme. Matja e tensionit linear, matja e energjis\u00eb dhe mbrojtjet nga rritja dhe ulja e tensionit nuk jan\u00eb t\u00eb disponueshme.<\/p>\n<p><img decoding=\"async\" alt=\"Sistemi i mbrojtjes me arka, me mund\u00ebsin\u00eb e aktivizimit nga sinjali i rrym\u00ebs\" src=\"\/wp-content\/uploads\/2019\/05\/d28c23a5da99f011260962f9d5f22124.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<h3>\u201c1LL\u201d<\/h3>\n<p>\nDispositivi \u00ebsht\u00eb e lidhur me tensionin e linj\u00ebs. E mundshme matja e tensionit n\u00eb nj\u00eb faz\u00eb dhe mbrojtje p\u00ebr reduktim dhe rritje tensioni. Mbrojtja e orientuar nga shkarkimi n\u00eb tok\u00eb nuk \u00ebsht\u00eb n\u00eb dispozicion.<\/p>\n<p><img decoding=\"async\" alt=\"Sistemi i mbrojtjes me arka, me mund\u00ebsin\u00eb e aktivizimit nga sinjali i rrym\u00ebs\" src=\"\/wp-content\/uploads\/2019\/05\/ef85c9390c7ffe9b21367cceca125f0c.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<h3>\u201c1LN\u201d<\/h3>\n<p>\nDispositivi \u00ebsht\u00eb i lidhur me nj\u00eb tension nj\u00ebfazor. E mundshme matja e tensionit n\u00eb nj\u00eb faz\u00eb. N\u00eb rrjetet me tok\u00ebzim t\u00eb plot\u00eb dhe neutral t\u00eb kompensuar, mbrojtjet p\u00ebr reduktim dhe rritje tensioni jan\u00eb n\u00eb dispozicion. Mbrojtja e orientuar nga shkarkimi n\u00eb tok\u00eb nuk \u00ebsht\u00eb n\u00eb dispozicion.<\/p>\n<p><img decoding=\"async\" alt=\"Sistemi i mbrojtjes me arka, me mund\u00ebsin\u00eb e aktivizimit nga sinjali i rrym\u00ebs\" src=\"\/wp-content\/uploads\/2019\/05\/5cb78a2fa82bd50a825f13fad995e134.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<h3>Pjes\u00ebt simetrike<\/h3>\n<p>\nN\u00eb nj\u00eb sistem tri-fazor, tensionet dhe rrymat mund t\u00eb shp\u00ebrndahen n\u00eb pjes\u00eb simetrike, sipas Fortesque.<\/p>\n<h3>Pjes\u00ebt simetrike jan\u00eb:<\/h3>\n<p><\/p>\n<ul>\n<li>Se kuadri i drejtp\u00ebrdrejt\u00eb.<\/li>\n<li>Se kuadri i kund\u00ebrt.<\/li>\n<li>Se kuadri zero.<\/li>\n<\/ul>\n<p><\/p>\n<h3>Objekti t\u00eb kontrolluara<\/h3>\n<p>\nKy dispozitiv lejon kontrollin deri n\u00eb gjasht\u00eb objekte, si\u00e7 jan\u00eb nd\u00ebrprer\u00ebsi, ndar\u00ebsi ose thika ndihm\u00ebse. Kontrolli mund t\u00eb realizohet sipas parimit \u2018zgjedhje-veprim\u2019 ose \u2018kontrolli i drejtp\u00ebrdrejt\u00eb\u2019.<\/p>\n<h3>Funksionet logjike<\/h3>\n<p>\nDispositivi mb\u00ebshtet logjik\u00ebn programore t\u00eb p\u00ebrdoruesit p\u00ebr shprehje logjike sinjalesh.<\/p>\n<h3>Funksionet e disponueshme p\u00ebrfshijn\u00eb:<\/h3>\n<p><\/p>\n<ul>\n<li>Dhe.<\/li>\n<li>Ose.<\/li>\n<li>Ose ekskluzive.<\/li>\n<li>Jo.<\/li>\n<li>COUNTERs.<\/li>\n<li>RS &amp; D flip-flops.<\/li>\n<\/ul>\n<p>Burimi: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/451212\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412 \u043a\u043b\u0430\u0441\u0441\u0438\u0447\u0435\u0441\u043a\u043e\u043c \u043f\u043e\u043d\u0438\u043c\u0430\u043d\u0438\u0438 \u0434\u0443\u0433\u043e\u0432\u0430\u044f \u0437\u0430\u0449\u0438\u0442\u0430 \u0432 \u0420\u043e\u0441\u0441\u0438\u0438 \u2013 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