Incazelo emfushane yokuqedwa kwe-harmonic ehlakaniphile kanye nedivayisi yokucindezela i-arc:
Ohlelweni lwaseShayina luka-3~35KV lokuphakela nokusabalalisa ugesi, iningi lazo amasistimu angenasisekelo.Ngokusho kwezindinganiso zemboni yenkampani yethu, lapho ukumiswa kwesigaba esisodwa kwenzeka, uhlelo luvunyelwe ukusebenza ngendlela engavamile amahora angu-2, okunciphisa kakhulu izindleko zokusebenza futhi kuthuthukisa ukuthembeka kwesistimu yokunikezwa kwamandla nokusabalalisa.Kodwa-ke, ngenxa yokwenyuka kancane kancane kwamandla okunikezwa kwamandla esistimu, imodi yokuphakela amandla ishintshile kancane kancane ukusuka kolayini abaphezulu kuya kwezintambo zekhebula, futhi amandla okusebenza kwesistimu ukuya phansi azoba mkhulu kakhulu.Uma isistimu yenza isisekelo sesigaba esisodwa, i-arc ekhiqizwa amandla amanje e-capacitor akulula ukucisha, futhi kungenzeka ibe idivayisi yokubeka phansi i-arc ngezikhathi ezithile.Ngalesi sikhathi, ukugcwala ngokweqile kwensiza ephansi ye-arc kanye nochungechunge lwe-ferromagnetic resonance overvoltage okudalwe yikho kuzofaka engozini kakhulu ukusebenza okuphephile kwegridi yamandla.I-overvoltage yedivayisi yesisekelo se-arc yesigaba esisodwa ibucayi kakhulu, futhi izinga elingavamile lesigaba sephutha lokudlula amandla lifinyelela izikhathi ezingu-3 ~ 3.5 zevolthi yesigaba sokusebenza esivamile.Uma i-overvoltage ephezulu kangaka isebenza kugridi amahora ambalwa, izolimaza nakanjani ukufakwa kwemishini kagesi.Ngemuva kokuthi ukufakwa kwamathuluzi kagesi sekuqoqwe futhi kwalimala izikhathi eziningi, kuzokwakhiwa ubuthakathaka bokufakwa kwe-insulation, okuholela ekwehleni kwe-insulation kanye nokubekwa phansi, okuholela engozini yokuhluleka kwesekethe emfushane ngemibala emibili.Ukwengeza, izophinda ibangele izingozi zokuphepha ezifana nokuwohloka kokufakwa kwezinto zikagesi (ikakhulukazi ukuhlukaniswa kwe-motor insulation), ukuqhuma kwekhebula, isilawuli se-voltage transformer saturation state excitation burning PT, kanye nokuqhuma kwe-zinc oxide arrester.Ukuze kuxazululwe inkinga ye-overvoltage ebangelwa idivayisi ye-arc kagesi ephansi yesikhathi eside, ikhoyili yokucindezela i-arc isetshenziselwa ukunxephezela okwamanje kwe-neutral point capacitor, futhi ukwenzeka kwephuzu elivamile le-arc kagesi liyacindezelwa.Inhloso yale ndlela ukuqeda ukukhanya kukagesi.Kodwa-ke, ngenxa yezici eziningi zekhoyili yokucindezela i-arc ngokwayo, akunakwenzeka ukunxephezela ngokuphumelelayo i-capacitive current, ikakhulukazi umonakalo obangelwa izingxenye zemvamisa ephezulu kumandla kagesi awukwazi ukuqedwa.Ngesisekelo sokufunda izindandatho ezihlukahlukene zokucindezela i-arc, inkampani yethu ithuthukise idivayisi ye-HYXHX ehlakaniphile yokucindezela i-arc.
Umgomo wokusebenza wedivayisi ehlakaniphile yokucindezela i-arc:
1. Uma uhlelo lusebenza ngokujwayelekile, ibhodi lokulawula ikhompiyutha i-ZK yedivayisi ngokuqhubekayo iqapha isignali ye-voltage eyenziwe yi-voltage transformer PT;
2. Lapho i-voltage esebenzayo yonxantathu oholayo wesibili oyisekelayo we-voltage transformer ishintsha isuka emehlukweni ongaba namandla aphansi iye emandleni aphezulu, kusho ukuthi isofthiwe yesistimu inephutha.Ngalesi sikhathi, ibhodi yokulawula ye-microcomputer ZK iqala ngokushesha, futhi ngesikhathi esifanayo ihlulela uhlobo lwephutha kanye nomehluko wesigaba ngokusho kwezinguquko ze-PT yesibili okukhipha amasignali Ua, Ub no-Uc:
a.Uma i-PT yesigaba esisodwa iphukile, isilawuli se-microcomputer ZK sizobonisa umehluko womugqa ophukile kanye nesignali yomugqa ophukile, futhi ikhiphe isignali yokuxhumana ye-passive switch ngesikhathi esifanayo;
b.Uma kuyiphutha lensimbi, iphaneli yokulawula ye-microcomputer i-ZK ibonisa indawo enephutha eliphansi kanye nesignali yesibaluli esiphansi, futhi ikhiphe isignali yokuthinta yokushintsha kokushintsha ngesikhathi esifanayo.Ngokwezidingo ezikhethekile zomsebenzisi, ingaphinde ikhiphe umyalo wokuvala wesenzo ku-vacuum contactor JZ ekhabhinethi, enganciphisa kakhulu i-voltage yokuxhumana kanye nesinyathelo se-voltage, futhi ivumelane nokuqinisekisa ukuphepha komuntu siqu;
c.Uma kuyiphutha le-arc, iphaneli yokulawula ye-microcomputer ZK izobonisa isigaba sephutha lomhlabathi kanye nesignali yesici somhlaba, futhi ngesikhathi esifanayo ithumele umyalo wokuvala ku-fault phase vacuum contactor JZ, futhi i-AC contactor izovala ngokushesha i-arc isisekelo sishintshwa sibe yinsimbi.Ngenxa yokucindezela kwe-arc kagesi ezinhlangothini zombili, i-arc kagesi ephansi iyancipha ibe zero ngokushesha, futhi i-arc kagesi icime ngokuphelele.Uma isetshenziswa kugridi ebuswa izintambo zokudlulisela, i-vacuum contactor JZ yamathuluzi izovala ngokuzenzakalelayo ngemva kwemizuzwana emi-5 yokusebenza.Uma kuwukuhluleka kwesivinini esisheshayo, isistimu izolulama.Uma kuyiphutha elingunaphakade, izoqhubeka nokusebenza futhi ibambe iqhaza ekunciphiseni unomphela ukugcwala ngokweqile.Futhi okukhipha isignali yokuxhumana ye-passive switch;
d.Uma idivayisi inomsebenzi wokukhetha othomathikhi, lapho i-voltage engunxantathu yokuvula eyisizayo engunxantathu engu-u ye-transformer PT ishintsha isuka kumandla aphansi iye kwamandla aphezulu, imojula encane yamanje yokukhetha isisekelo iqoqa ngokushesha i-zero-phase yamanje yomugqa ngamunye, futhi uma kukhona akukho ukumiswa kwesigaba esisodwa Uma kwenzeka iphutha lensimbi lensimbi elingenakukwazi ukutholwa ngokujwayelekile, khetha umugqa wephutha ngokuya nge-amplitude ye-zero-phase yamanje yomugqa.Umugqa wephutha ukhethwa ngokuya ngesimiso soguquko olukhulu ngaphambi nangemva kokuba i-arc yokubeka phansi icishiwe.
Izici eziyinhloko zedivayisi ehlakaniphile yokucindezela i-arc:
1. Idivayisi isebenza ngokushesha futhi ingasebenza phakathi kwama-millisecond angu-30 kuya kwangu-40, okufinyeza kakhulu ubude be-arc yesigaba esisodwa esiphansi;
2. I-arc ingacishwa ngokushesha ngemva kokuba idivayisi isiqalile ukusebenza, kunciphise ngempumelelo i-arc grounding overvoltage ngaphakathi kwebanga lamandla kagesi aku-inthanethi.
3. Ngemuva kokusebenza kwedivayisi, vumela amandla wamanje wesistimu ukuthi adluliswe ngokuqhubekayo okungenani amahora amabili, futhi umsebenzisi angabhekana nolayini onephutha ngemuva kokuqeda umsebenzi wokushintsha umthwalo.
4. Umsebenzi wokuvikela wezinto zokusebenza awuthintwa isikali kanye nemodi yokusebenza yegridi yamandla;
5. Idivayisi iyonga kakhulu.Ama-voltage transformer anganikeza amasignali kagesi okulinganisa nokuvikela, esikhundleni samakhabhinethi e-voltage transformer yendabuko.
6. Idivayisi ifakwe idivayisi encane yamanje yokukhetha umugqa ophansi, engathuthukisa kakhulu ukunemba kokukhethwa komugqa ngokusebenzisa izici zokuguqulwa okukhulu kwe-zero-sequence yamanje yomugqa wephutha ngaphambi nangemuva kokucisha i-arc.
7. Lolu cingo lwamukela inhlanganisela ye-anti-saturation voltage transformer kanye nesikhansela esikhethekile esinqunyelwe samanje se-harmonic, esicindezela ngokuyisisekelo i-ferromagnetic resonance futhi sivikele ngempumelelo i-PT.
8. Lesi sixhobo sinomsebenzi wokurekhoda amaphutha avamile wedivaysi yokumisa i-arc kagesi, futhi inikeza idatha kumakhasimende ukuze ahlaziye izingozi zokuphepha.
Imisebenzi eyisisekelo yokucindezela kwe-arc ehlakaniphile kanye nedivayisi yokususa i-harmonic:
1. Uma idivayisi isebenza ngokujwayelekile, inomsebenzi we-PT cabinet
2. Ngesikhathi esifanayo, inomsebenzi we-alamu yokunqanyulwa kwesistimu nokukhiya;
3. I-alamu yensimbi yesistimu ye-fault, i-alamu yokudlulisa i-ground fault point function;
4. Sula idivayisi yokumisa i-arc, umsebenzi we-software yochungechunge lwe-resonance;umsebenzi we-alamu ophansi we-voltage kanye ne-overvoltage;
5. Inemisebenzi yokurekhoda yolwazi njengesikhathi sokuqeda i-alamu yephutha, imvelo yephutha, isigaba sephutha, i-voltage yesistimu, i-voltage ye-delta evulekile yesifunda, i-capacitor ground current, njll., elungele ukuphathwa kwephutha nokuhlaziywa;
6. Uma isofthiwe yesistimu inephutha lesigaba esisodwa sokumisa, idivayisi ingaxhuma ngokushesha iphutha phansi phakathi kuka-30ms ngokusebenzisa isixhumi esikhethekile sokuhlukanisa isigaba.I-grounding overvoltage izinzile ezingeni le-voltage yesigaba, engavimbela ngempumelelo iphutha lesifunda esifushane elinemibala emibili elibangelwa ukumiswa kwesigaba esisodwa kanye nokuqhuma kwe-zinc oxide arrester okubangelwa i-arc grounding overvoltage.
7. Uma insimbi igxiliwe, i-voltage yokuxhumana kanye nesinyathelo se-voltage ingancishiswa kakhulu, okulungele ukuqinisekisa ukuphepha komuntu siqu (isisekelo sensimbi singasethwa ukuthi ngabe idivayisi isebenza ngokuvumelana nezidingo zomsebenzisi);
8. Uma isetshenziswa kugridi yamandla ikakhulukazi eyakhiwe imigqa ephezulu, isixhumi esingenasici sizovala ngokuzenzakalelayo ngemva kwamasekhondi angu-5 okusebenza kwedivayisi.Uma kuwukwehluleka kwesikhashana, isistimu izobuyela kokujwayelekile.Esimeni sokwehluleka unaphakade, idivayisi izophinda isebenze ukuze ikhawulele unomphela ukugcwala ngokweqile.
9. Uma kwenzeka iphutha lokunqanyulwa kwe-PT ohlelweni, idivayisi izobonisa umehluko wesigaba sephutha lokunqanyulwa futhi ikhiphe isignali yokuxhumana ngesikhathi esifanayo, ukuze umsebenzisi akwazi ukukhiya ngokuthembekile idivayisi yokuvikela engase yehluleke ngenxa yokunqanyulwa kwe-PT. .
10. Ubuchwepheshe bedivayisi obuyingqayizivele be-“intelligent socket (PTK)” bungacindezela ngokuphelele ukwenzeka kwe-ferromagnetic resonance, futhi buvikele ngempumelelo iplatinum ekushi, ekuqhumeni nakwezinye izingozi ezibangelwa ukukhala kwesistimu.
11. Lolu cingo lufakwe isokhethi le-RS485, futhi lwamukela iphrothokholi yokuxhumana ye-MODBUS ejwayelekile ukuze kuqinisekiswe imodi yokuhambisana phakathi kwedivayisi nawo wonke amasistimu okuqapha amavidiyo, nokugcina imisebenzi yokudluliswa kwedatha nesilawuli kude.
Imisebenzi eyengeziwe yokucindezelwa kwe-arc ehlakaniphile kanye nedivayisi yokususa i-harmonic:
1. Umsebenzi wokukhetha othomathikhi ungalungiswa ngokuya ngezidingo zomsebenzisi
2. Idivaysi encane yamanje yokukhetha umugqa ophansi ye-HYLX eyakhiwe inkampani yethu ikhetha ngokuyinhloko umugqa ngokuvumelana nobukhulu bamanje bokulandelana kweqanda lapho uhlelo lusekelwe phansi.Inqoba ububi bokunemba okuphansi komugqa wokukhetha lapho ijubane lomugqa wokukhetha lihamba kancane futhi i-arc isekelwe kudivayisi yomugqa wokukhetha evamile.
3. Umsebenzi wokuqeda (ukususa) i-resonance (ukudlidliza) ungahlelwa ngokuya ngezidingo zomsebenzisi;
4. Isiguquli samandla kagesi esikhethekile esilwa nokugcwala kwamanzi esakhiwe inkampani yethu singalungiselelwa ukuthi sifane nesikhanseli se-harmonic esinqunyelwe njengamanje, esicekela phansi ngokuyisisekelo isimo se-ferromagnetic resonance futhi sigweme “i-platinum evuthayo” kanye “nokuqhuma kokuphepha kwe-platinum” okubangelwa INGOZI ye-resonance overvoltage. .
5. Idivaysi yokuqeda i-harmonic ye-Microcomputer nayo ingamiswa ngokuvumelana nezidingo zomsebenzisi ukuze kuqedwe i-ferromagnetic resonance.
Isikhathi sokuthumela: Apr-13-2023