{"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\/et\/blog\/novosti-interneta\/sistema-dugovoj-zashhity-s-vozmozhnostyu-srabatyvaniya-po-tokovomu-signalu","title":{"rendered":"Kaarekaitses\u00fcsteem, mille p\u00e4\u00e4stikuks on voolutugevuse signaal","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><img decoding=\"async\" alt=\"Kaarekaitses\u00fcsteem, mille p\u00e4\u00e4stikuks on voolutugevuse signaal\" src=\"\/wp-content\/uploads\/2019\/05\/07bfb9a07736ce2f9f9d17ef429b1d67.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nKlassikalisest vaatepunktist on kaar kaitse Venemaal kiire reageerimisega l\u00fchise kaitse, mis p\u00f5hineb avatud elektrikaare valgusspetra registreerimisel KRU-s. K\u00f5ige levinum meetod valgusspetra registreerimiseks on kiudoptilised andurid, mida kasutatakse peamiselt t\u00f6\u00f6stussektoris. Kuid uute toodete, nagu modulaarsete AFDD-de, mis t\u00f6\u00f6tavad voolusignaalide alusel ja v\u00f5imaldavad kaar kaitset paigaldada v\u00e4ljundliinidele, sealhulgas jaotuskarbid, kaablid, \u00fchendused, pistikupesad jne, ilmumisega elamussektori huvi selle teema vastu kasvab.<br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><br \/>\n<img decoding=\"async\" alt=\"Kaarekaitses\u00fcsteem, mille p\u00e4\u00e4stikuks on voolutugevuse signaal\" src=\"\/wp-content\/uploads\/2019\/05\/f35ab8d139903844857910e809d4c981.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nKuid tootjad ei jagat palju teavet modulaarsete toodete \u00fcksikasjaliku ja detailse \u00fclesehituse kohta (kui kellelgi on sellist teavet, oleksin saanud r\u00f5\u00f5muga linkidest, mis seda sisaldavad), kuid t\u00f6\u00f6stussektori kaar kaitses\u00fcsteemide korral on olukord teine; seal on kasutusjuhend 122 lehek\u00fcljel, kus \u00fcksikasjalikult esitletakse t\u00f6\u00f6p\u00f5him\u00f5te.<\/p>\n<p>Vaatame n\u00e4iteks Schneider Electric'i VAMP 321 arkaadkaitses\u00fcsteemi, mis sisaldab k\u00f5iki arkaadi kaitsefunktsioone, nagu voolutugevuse \u00fclepinge ja arkaadi j\u00e4lgimine.<\/p>\n<p><img decoding=\"async\" alt=\"Kaarekaitses\u00fcsteem, mille p\u00e4\u00e4stikuks on voolutugevuse signaal\" src=\"\/wp-content\/uploads\/2019\/05\/1f41efdf7c3b6db7c38b4901a2954927.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<h3>Funktsionaalsus<\/h3>\n<p><\/p>\n<ul>\n<li>Kolmefaasilise voolu kontroll.<\/li>\n<li>Nullseeria vool.<\/li>\n<li>S\u00fcndmuste logimine, h\u00e4irere\u017eiimide salvestamine.<\/li>\n<li>Toimivus kas samaaegselt voolu ja valguse j\u00e4rgi, v\u00f5i ainult valguse j\u00e4rgi, v\u00f5i ainult voolu j\u00e4rgi.<\/li>\n<li>Mehaanilise relee v\u00e4ljal\u00fclitamise aeg on alla 7 ms, valikulise IGBT-kaardi korral v\u00e4heneb see aeg 1 ms-ni.<\/li>\n<li>Kohandatavad aktiveerimispiirkonnad.<\/li>\n<li>Pidev enesekontrollis\u00fcsteem.<\/li>\n<li>Seadet saab kasutada erinevates madal- ja keskpinge arkaadkaitses\u00fcsteemides.<\/li>\n<li>Arkaadide v\u00e4lgudemetoodik ja arkaadkaitses\u00fcsteem m\u00f5\u00f5dab l\u00fchise voolu ja signaali arkaadide andurikanalite kaudu ning v\u00e4hendab l\u00fchise korral s\u00fcttimisaega kiiresti, katkestades voolu, mis toitub arkaadist.<\/li>\n<\/ul>\n<p><\/p>\n<h3>Maatriksite korrelatsiooniprintsiiip.<\/h3>\n<p>\nKonkreetse arkaadkaitse astme aktiveerimise tingimuste m\u00e4\u00e4ramisel rakendatakse valguse ja voolu maatriksite v\u00e4ljunditele loogilist summat.<\/p>\n<p>Kui kaitsetase on valitud ainult \u00fches matriisis, t\u00f6\u00f6tab see kas voolutingimuse v\u00f5i valgusega, seega saab s\u00fcsteemi seadistada t\u00f6\u00f6tama ainult voolupulsiga.<\/p>\n<h3>Signaalid, mis on programmeerimise k\u00e4igus saadaval kaitseastmete j\u00e4lgimiseks:<\/h3>\n<p><\/p>\n<ul>\n<li>Voolud faasides.<\/li>\n<li>Nullseeria vool.<\/li>\n<li>Joonpinged.<\/li>\n<li>Faasipinged.<\/li>\n<li>Nullj\u00e4rjestuse pinge.<\/li>\n<li>Sagedus.<\/li>\n<li>Faaside voolude summa.<\/li>\n<li>Otsese j\u00e4rjestuse vool.<\/li>\n<li>Tagurpidi j\u00e4rjestuse vool.<\/li>\n<li>Tagurpidi j\u00e4rjestuse voo suhteline v\u00e4\u00e4rtus.<\/li>\n<li>Voolude suhe tagurpidi ja nullj\u00e4rjestuse vahel.<\/li>\n<li>Otsese j\u00e4rjestuse pinge.<\/li>\n<li>Tagurpidi j\u00e4rjestuse pinge.<\/li>\n<li>Tagurpidi j\u00e4rjestuse pinge suhteline v\u00e4\u00e4rtus.<\/li>\n<li>Faaside voolu keskmine v\u00e4\u00e4rtus (IL1+IL2+IL3)\/3.<\/li>\n<li>UL1, UL2, UL3 pinge keskmine v\u00e4\u00e4rtus.<\/li>\n<li>U12, U23, U32 pinge keskmine v\u00e4\u00e4rtus.<\/li>\n<li>IL1 mittelineaarsuse koefitsient.<\/li>\n<li>IL2 mittelineaarsuse koefitsient.<\/li>\n<li>IL3 mittelineaarsuse koefitsient.<\/li>\n<li>Ua mittelineaarsuse koefitsient.<\/li>\n<li>IL1 ruutkeskmine v\u00e4\u00e4rtus.<\/li>\n<li>IL2 ruutkeskmine v\u00e4\u00e4rtus.<\/li>\n<li>IL3 ruutkeskmine v\u00e4\u00e4rtus.<\/li>\n<li>IL1, IL2, IL3 minimaalne v\u00e4\u00e4rtus.<\/li>\n<li>IL1, IL2, IL3 maksimaalne v\u00e4\u00e4rtus.<\/li>\n<li>U12, U23, U32 minimaalne v\u00e4\u00e4rtus.<\/li>\n<li>U12, U23, U32 maksimaalne v\u00e4\u00e4rtus.<\/li>\n<li>UL1, UL2, UL3 minimaalne v\u00e4\u00e4rtus.<\/li>\n<li>UL1, UL2, UL3 maksimaalne v\u00e4\u00e4rtus.<\/li>\n<li>Taustv\u00e4\u00e4rtus Uo.<\/li>\n<li>Ruutsumma I\u043e.<\/li>\n<\/ul>\n<p><\/p>\n<h3>H\u00e4daolukordade salvestamine<\/h3>\n<p>\nH\u00e4daolukordade salvestamine v\u00f5ib olla kasutatud k\u00f5ikide m\u00f5\u00f5tesignaalide (vood, pinged, digitaalsete sisendite ja v\u00e4ljundite olekute info) salvestamiseks. Digitaalsed sisendid sisaldavad ka kaares\u00fcsteemi kaitsesignaalide signaale.<\/p>\n<h3>Salvestamise k\u00e4ivitamine<\/h3>\n<p>\nSalvestamine v\u00f5ib alata k\u00e4ivitamisest v\u00f5i mis tahes kaitseastme aktiveerimisest v\u00f5i mis tahes digitaalsest sisendist. K\u00e4ivitussignaal valitakse v\u00e4ljundsignaalide ruudustikus (vertikaalne signaal DR). Samuti v\u00f5ib salvestamist alustada k\u00e4sitsi.<\/p>\n<h3>Isekontroll<\/h3>\n<p>\nSeadme energias\u00f5ltumatu m\u00e4lu on realiseeritud suurte kapatsiteediga kondensaatori ja madala energiatarbimisega m\u00e4luga.<\/p>\n<p>Kui t\u00e4iendav toiteallikas on sisse l\u00fclitatud, toidetakse kondensaatorit ja RAM-i sisemisest allikast. Kui toiteallikas on v\u00e4lja l\u00fclitatud, hakkab RAM saama voolu kondensaatorilt. See s\u00e4ilitab teabe seni, kuni kondensaator suudab hoida lubatud pinget. +25\u00b0C temperatuuriga ruumis on t\u00f6\u00f6aeg umbes 7 p\u00e4eva (k\u00f5rge niiskus v\u00e4hendab seda parameetrit).<\/p>\n<p>Energiakindel RAM on m\u00f5eldud h\u00e4irere\u017eiimide ja s\u00fcndmuste logide salvestamiseks.<\/p>\n<p>Mikrokontrolleri funktsioone ja selle k\u00fclge \u00fchendatud kaablite terviklikkust, samuti tarkvara t\u00f6\u00f6kindlust kontrollib eraldi enesekontrolli v\u00f5rgustik. Lisaks j\u00e4lgimisele proovib see v\u00f5rgustik mikrokontrollerit t\u00f5rgete korral taask\u00e4ivitada. Kui taask\u00e4ivitamine eba\u00f5nnestub, annab enesekontrolli seade m\u00e4rku, et algab pideva sisemise rikke indikaator.<\/p>\n<p>Kui isejuhtimise seade tuvastab pideva rikke, lukustab see teised v\u00e4ljundreleed (v\u00e4lja arvatud isejuhtimise funktsiooni v\u00e4ljundrelee ja n\u00f6\u00f6rikaitsel kasutatavad v\u00e4ljundreleed).<\/p>\n<p>Kontrollitakse ka sisemist toiteallikat. Kui t\u00e4iendavat toiteallikat ei ole, saadetakse automaatselt alarmisignaal. See t\u00e4hendab, et sisemise rikke v\u00e4ljundrelee on pingestatud, kui t\u00e4iendav toiteallikas on sisse l\u00fclitatud ja sisemisi rikete ei ole tuvastatud.<\/p>\n<p>Kontrollitakse keskseadet, sisend-\/v\u00e4ljundseadmeid ja andureid.<\/p>\n<h3>N\u00f6\u00f6rikaitse funktsiooniga kasutatavad m\u00f5\u00f5tmised<\/h3>\n<p>\nKolme faasi voolu ja maasisu voolu m\u00f5\u00f5tmine n\u00f6\u00f6rikaitse jaoks toimub elektroonika kaudu. Elektroonika v\u00f5rdleb voolutasemeid seadistuste v\u00e4\u00e4rtustega ja v\u00e4ljastab binaarsed signaalid \u201cI&gt;&gt;\u201d v\u00f5i \u201cIo&gt;&gt;\u201d, kui piir \u00fcletatakse. Arvesse v\u00f5etakse k\u00f5iki voolu komponente.<\/p>\n<p>Signaalid \u201cI&gt;&gt;\u201d ja \u201cIo&gt;&gt;\u201d on seotud FPGA kiibiga, mis teostab kaare kaitse funktsiooni. Kaare kaitse m\u00f5\u00f5tmise t\u00e4psus on \u00b1 15% 50 Hz juures.<\/p>\n<p><img decoding=\"async\" alt=\"Kaarekaitses\u00fcsteem, mille p\u00e4\u00e4stikuks on voolutugevuse signaal\" src=\"\/wp-content\/uploads\/2019\/05\/c1f12088f2d6f4f00acaadac09a254cb.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<h3>Harmoonikad ja \u00fcldine mittesinusoidaalsus (THD)<\/h3>\n<p>\nSeade arvutab THD protsendina p\u00f5hifrekventsidel vooludest ja pingetest.<\/p>\n<p>Harmoonikad 2. kuni 15. j\u00e4rjestikuse jaoks arvestatakse faasivoolude ja pingete puhul. (17. harmoonika arvestatakse osaliselt 15. harmoonika v\u00e4\u00e4rtuses. See juhtub digitaalse m\u00f5\u00f5tmise p\u00f5him\u00f5tete t\u00f5ttu.)<\/p>\n<h3>Pinge m\u00f5\u00f5tmise re\u017eiimid<\/h3>\n<p>\nS\u00f5ltuvalt rakendusest ja olemasolevatest voolumuunduritest v\u00f5ib seade olla \u00fchendatud kas nulli j\u00e4rjestuse pinge, sirge v\u00f5i faasi pingega. Kohandatav parameeter \u201cPinge m\u00f5\u00f5tmise re\u017eiim\u201d peab olema seatud vastavalt kasutatavale \u00fchendusele.<\/p>\n<h3>Saadaval re\u017eiimid:<\/h3>\n<p><\/p>\n<h3>\u201cU0\u201d<\/h3>\n<p>\nSeade on \u00fchendatud nulli j\u00e4rjestuse pingega. Saadaval on suunatud kaitse maavoolu l\u00fchise eest. Sirge pinge m\u00f5\u00f5tmine, energia m\u00f5\u00f5tmine ja pingete t\u00f5usu- ja languse kaitse ei ole saadaval.<\/p>\n<p><img decoding=\"async\" alt=\"Kaarekaitses\u00fcsteem, mille p\u00e4\u00e4stikuks on voolutugevuse signaal\" src=\"\/wp-content\/uploads\/2019\/05\/d28c23a5da99f011260962f9d5f22124.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<h3>\u201c1LL\u201d<\/h3>\n<p>\nSeade on \u00fchendatud \u00fchefaasilise pingega. \u00dchefaasilise pinge m\u00f5\u00f5tmine ja pingekaitse alandamise ja t\u00f5stmise eest on saadaval. Suunatud maapinda l\u00fchistamise kaitse ei ole saadaval.<\/p>\n<p><img decoding=\"async\" alt=\"Kaarekaitses\u00fcsteem, mille p\u00e4\u00e4stikuks on voolutugevuse signaal\" src=\"\/wp-content\/uploads\/2019\/05\/ef85c9390c7ffe9b21367cceca125f0c.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<h3>\u201c1LN\u201d<\/h3>\n<p>\nSeade on \u00fchendatud \u00fchefaasilise pingega. \u00dchefaasilise pinge m\u00f5\u00f5tmine on saadaval. Gloomaktsentide ja kompenseeritud neutraali korral on saadaval pingekaitse alandamise ja t\u00f5stmise eest. Suunatud maapinda l\u00fchistamise kaitse ei ole saadaval.<\/p>\n<p><img decoding=\"async\" alt=\"Kaarekaitses\u00fcsteem, mille p\u00e4\u00e4stikuks on voolutugevuse signaal\" src=\"\/wp-content\/uploads\/2019\/05\/5cb78a2fa82bd50a825f13fad995e134.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<h3>S\u00fcmmeetrilised koostisosad<\/h3>\n<p>\nKolmefaasilises s\u00fcsteemis saavad pinged ja voolud olla jagatud s\u00fcmmeetrilisteks koostisosadeks vastavalt Fortescue'ile.<\/p>\n<h3>S\u00fcmmeetrilised koostisosad on:<\/h3>\n<p><\/p>\n<ul>\n<li>Otsene j\u00e4rjestus.<\/li>\n<li>Tagasij\u00e4rjestus.<\/li>\n<li>Nullj\u00e4rjestus.<\/li>\n<\/ul>\n<p><\/p>\n<h3>Kontrollitavad objektid<\/h3>\n<p>\nSee seade v\u00f5imaldab kontrollida kuni kuut objekti, nagu l\u00fcliti, l\u00f5husti v\u00f5i maandusnoa. Kontrollimine v\u00f5ib toimuda 'valik-tegevus' v\u00f5i 'otse kontrolli' p\u00f5him\u00f5tte j\u00e4rgi.<\/p>\n<h3>Loogilised funktsioonid<\/h3>\n<p>\nSeade toetab kasutaja programmilist loogikat signaalide loogiliste avalduste jaoks.<\/p>\n<h3>Saadaval on j\u00e4rgmised funktsioonid:<\/h3>\n<p><\/p>\n<ul>\n<li>JA.<\/li>\n<li>V\u00d5I.<\/li>\n<li>Eksklusiivne V\u00d5I.<\/li>\n<li>EI.<\/li>\n<li>COUNTERid.<\/li>\n<li>RS &amp; D flip-flop' id.<\/li>\n<\/ul>\n<p>Allikas: <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 \u044d\u0442\u043e \u0431\u044b\u0441\u0442\u0440\u043e\u0434\u0435\u0439\u0441\u0442\u0432\u0443\u044e\u0449\u0430\u044f \u0437\u0430\u0449\u0438\u0442\u0430 \u043e\u0442 \u043a\u043e\u0440\u043e\u0442\u043a\u0438\u0445 \u0437\u0430\u043c\u044b\u043a\u0430\u043d\u0438\u0439, \u043e\u0441\u043d\u043e\u0432\u0430\u043d\u043d\u0430\u044f \u043d\u0430 \u0440\u0435\u0433\u0438\u0441\u0442\u0440\u0430\u0446\u0438\u0438 \u0441\u043f\u0435\u043a\u0442\u0440\u0430 \u0441\u0432\u0435\u0442\u0430 \u043e\u0442\u043a\u0440\u044b\u0442\u043e\u0439 \u044d\u043b\u0435\u043a\u0442\u0440\u0438\u0447\u0435\u0441\u043a\u043e\u0439 \u0434\u0443\u0433\u0438 \u0432 \u041a\u0420\u0423, \u043d\u0430\u0438\u0431\u043e\u043b\u0435\u0435 \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u0451\u043d \u043c\u0435\u0442\u043e\u0434 \u0440\u0435\u0433\u0438\u0441\u0442\u0440\u0430\u0446\u0438\u0438 \u0441\u043f\u0435\u043a\u0442\u0440\u0430 \u0441\u0432\u0435\u0442\u0430 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