Inkcazo emfutshane yokupheliswa okukrelekrele kwe-harmonic kunye nesixhobo sokucinezela i-arc:
Kwi-3 ~ 35KV yaseTshayina yonikezelo lwamandla kunye nenkqubo yokuhambisa, uninzi lwazo ziinkqubo ezingathathi hlangothi ezingenasiseko.Ngokwemigangatho yoshishino yenkampani yethu, xa isiseko sesigaba esisodwa senzeke, inkqubo ivumelekile ukuba isebenze ngokungaqhelekanga kwiiyure ze-2, ezinciphisa kakhulu iindleko zokusebenza kunye nokuphucula ukuthembeka kokunikezelwa kwamandla kunye nenkqubo yokusabalalisa.Nangona kunjalo, ngenxa yokwanda kancinci kwamandla ombane wenkqubo, imowudi yonikezelo lwamandla iye yatshintsha ngokuthe ngcembe ukusuka kwimigca ephezulu ukuya kwiintambo zentambo, kwaye amandla akhoyo enkqubo ukuya emhlabeni aya kuba mkhulu kakhulu.Xa inkqubo isenza i-single-phase-grounding, i-arc eyenziwa yi-capacitor yangoku ngokugqithisileyo akulula ukuyicima, kwaye inokuthi ibe yinto ephazamisayo yokumisa i-arc.Ngeli xesha, i-overvoltage yesixhobo sokumisa i-arc kunye ne-ferromagnetic series resonance overvoltage ebangelwa yiyo kuya kubeka emngciphekweni ukusebenza ngokukhuselekileyo kwegridi yamandla.I-overvoltage ye-single-phase-arc arc isixhobo sokumisa i-arc inzima kakhulu, kwaye inqanaba elingaqhelekanga le-fault phase overvoltage level lifikelela kwi-3 ~ 3.5 amaxesha ombane wesigaba sokusebenza esiqhelekileyo.Ukuba ukugqithisa okuphezulu okunjalo kusebenza kwigridi kwiiyure ezininzi, ngokuqinisekileyo kuya kulimaza ukufakwa kwezixhobo zombane.Emva kokuba i-insulation yezixhobo zombane iqokelelwe kwaye yonakaliswe ngamaxesha amaninzi, ubuthathaka be-insulation buya kuqulunqwa, okukhokelela ekuqhekekeni kwe-insulation kunye ne-grounding, okukhokelela kwingozi yokungaphumeleli kwesiphaluka esifutshane semibala emibini.Ukongeza, iya kubangela iingozi zokhuseleko ezinje ngokonakala kwezixhobo zombane (ingakumbi ukuqhawuka kokugqunywa kwemoto), ukuqhuma kwentambo, i-voltage transformer saturation state excitation regulator burning PT, kunye ne-zinc oxide arrester explosion.Ukuze ucombulule ingxaki yokugqithiswa kwe-overvoltage ebangelwa isixhobo sokumisa i-arc yexesha elide lombane, i-coil yokunciphisa i-arc isetyenziselwa ukuhlawulela i-current ye-neutral point capacitor, kunye nokuvela kwe-fault point point arc yombane icinezelwe.Injongo yale ndlela kukuphelisa ukukhanya kombane.Nangona kunjalo, ngenxa yeempawu ezininzi ze-arc yokunciphisa i-coil ngokwayo, akunakwenzeka ukuhlawulela ngokufanelekileyo i-capacitive current, ngokukodwa umonakalo obangelwa ngamacandelo aphezulu ombane kunikezelo lwamandla alukwazi ukupheliswa.Kwisiseko sokufunda iiringi ezahlukeneyo zokucinezela i-arc, inkampani yethu iphuhlise isixhobo esikrelekrele se-arc ye-HYXHX.
Umgaqo osebenzayo wesixhobo esikrelekrele sokucinezela i-arc:
1. Xa inkqubo isebenza ngokuqhelekileyo, ibhodi yokulawula ikhomputha ye-ZK yesixhobo ibeka iliso ngokuqhubekayo i-voltage signal eyenziwa yi-voltage transformer PT;
2. Xa i-voltage esebenzayo ye-axiliary secondary lead triangle ye-voltage transformer itshintsha ukusuka kuntlukwano ophantsi onokuthi ube namandla aphezulu, oko kuthetha ukuba isofthiwe yenkqubo iphosakele.Ngeli xesha, ibhodi yokulawula i-microcomputer ZK iqala ngoko nangoko, kwaye kwangaxeshanye igweba uhlobo lwempazamo kunye nokwahlukana kwesigaba ngokotshintsho lweempawu zesibini zemveliso ye-PT Ua, Ub no-Uc:
a.Ukuba i-PT yesigaba esisodwa iphukile, umlawuli we-microcomputer u-ZK uya kubonisa ukuhlukana komgca ophukileyo kunye nomqondiso womgca ophukileyo, kunye nokukhupha isignali yokudibanisa i-passive switch ngexesha elifanayo;
b.Ukuba sisiphoso sokumisa isinyithi, ipaneli yokulawula ye-microcomputer i-ZK ibonisa indawo yempazamo esezantsi kunye nophawu lophawu lomgangatho, kwaye ikhupha isignali yokuchukumisa i-passive switch ngaxeshanye.Ngokweemfuno ezikhethekileyo zomsebenzisi, inokuphinda ikhuphe umyalelo wokuvala kwi-vacuum contactor JZ kwikhabhinethi, enokunciphisa kakhulu i-voltage yoqhagamshelwano kunye ne-voltage yesinyathelo, kwaye inceda ekuqinisekiseni ukhuseleko lomntu;
c.Ukuba yimpazamo ye-arc, iphaneli yokulawula i-microcomputer ye-ZK iya kubonisa isigaba sesiphoso somhlaba kunye nomqondiso weempawu zomhlaba, kwaye kwangaxeshanye thumela umyalelo wokuvala kwi-fault phase vacuum contactor JZ, kwaye i-AC contactor iya kuvala ngokukhawuleza i-arc. isiseko sitshintshelwa kwisiseko sesinyithi.Ngenxa yoxinzelelo lwe-arc yombane kumacala omabini, i-arc yombane ephantsi iyancipha ukuya kwi-zero ngokukhawuleza, kwaye i-arc yombane iyacinywa ngokupheleleyo.Ukuba isetyenziswe kwigridi elawulwa yimigca yokuhambisa, i-vacuum contactor JZ yezixhobo iya kuvala ngokuzenzekelayo emva kwemizuzwana emi-5 yokusebenza.Ukuba kukungaphumeleli kwesantya esikhawulezileyo, inkqubo iya kubuyiselwa.Ukuba yimpazamo esisigxina, iya kuqhubeka isebenza kwaye idlala indima ekunciphiseni ngokusisigxina ukugqithisa.Kwaye isiphumo sokwenziwa koqhagamshelwano lwesignali yoqhagamshelwano;
d.Ukuba isixhobo sinomsebenzi wokukhetha okuzenzekelayo, xa i-voltage engunxantathu yokuvula unxantathu u-u ye-transformer PT itshintsha ukusuka kwikhono eliphantsi ukuya kwikhono eliphezulu, imodyuli yokukhetha yokumisa encinci yangoku iqokelela ngokukhawuleza i-zero yesigaba sangoku somgca ngamnye, kwaye xa kukho akukho nqanaba elisezantsi Kwimeko yesiphoso somhlaba wesinyithi esingenakufunyanwa ngokuqhelekileyo, khetha umgca wephutha ngokwe-amplitude ye-zero-phase current of the line.Umgca wesiphoso ukhethwe ngokomgaqo wokuguqulwa okukhulu ngaphambi nangemva kokuba i-arc yokumisa icinyiwe.
Iimpawu eziphambili zesixhobo sokucinezela i-arc:
1. Isixhobo siqhuba ngokukhawuleza kwaye sinokusebenza ngaphakathi kwe-30 ukuya kwi-40 milliseconds, enciphisa kakhulu ixesha le-arc yesigaba esisodwa sokumisa;
2. I-arc inokucima ngokukhawuleza emva kokuba isixhobo sisebenza, ngokufanelekileyo ukunciphisa i-arc grounding overvoltage ngaphakathi koluhlu lwe-intanethi.
3. Emva kokusebenza kwesixhobo, vumela umbane wangoku wenkqubo ukuba udluliselwe ngokuqhubekayo ubuncinane iiyure ezimbini, kwaye umsebenzisi unokujongana nomgca ophosakeleyo emva kokugqiba umsebenzi wokutshintsha komthwalo.
4. Umsebenzi wokukhusela wesixhobo awuchaphazeleki kwisikali kunye nemodi yokusebenza yegridi yamandla;
5. Isixhobo siyabiza.Iziguquli ze-voltage zinokubonelela ngemiqondiso yombane wokulinganisa kunye nokukhusela, ukutshintshela iikhabhathi zemveli zokuguqula amandla ombane.
6. Isixhobo sixhotyiswe ngesixhobo esincinci sokukhetha umgca wesiseko sangoku, esinokuphucula kakhulu ukuchaneka kokukhethwa komgca ngokusebenzisa iimpawu zokuguqulwa okukhulu kwe-zero-sequence current yomgca wephutha ngaphambi nangemva kokucima i-arc.
7. Isixhobo samkela indibaniselwano ye-anti-saturation i-voltage transformer kunye ne-primary primary-limiting canceller ye-harmonic, ethi ngokusisiseko icinezele i-ferromagnetic resonance kwaye ikhusele ngokufanelekileyo i-PT.
8. Esi sixhobo sinomsebenzi wokurekhoda iimpazamo eziqhelekileyo zesixhobo sokumisa i-arc yombane, kwaye sibonelela ngedatha kubathengi ukuba bahlalutye izingozi zokhuseleko.
Imisebenzi esisiseko ye-arc ekrelekrele yokucinezela kunye nesixhobo sokuphelisa i-harmonic:
1. Xa isixhobo sisebenza ngokuqhelekileyo, sinomsebenzi we-PT cabinet
2. Ngelo xesha, inomsebenzi we-alarm yokuqhawula inkqubo kunye nokukhiya;
3. Inkqubo yentsimbi yentsimbi ye-alarm yomhlaba, inkqubo yokudlulisa i-fault point function;
4. Sula isixhobo sokumisa i-arc, umsebenzi wenkqubo yesoftware ye-resonance;i-voltage esezantsi kunye nomsebenzi we-alarm overvoltage;
5. Inemisebenzi yokurekhoda yolwazi efana nexesha lokuphelisa i-alarm, i-fault nature, i-fault phase, i-voltage ye-system, i-voltage evulekile ye-delta voltage, i-capacitor ground current, njl., ekulungele ukuphatha iimpazamo kunye nokuhlalutya;
6. Xa isoftware yesistim inesiphambeko senqanaba elinye, isixhobo sinokudibanisa ngokukhawuleza impazamo emhlabeni malunga ne-30ms ngokusebenzisa i-splitting vacuum contactor ekhethekileyo.I-grounding overvoltage izinzile kwinqanaba le-voltage yesigaba, esinokuthi sithintele ngokufanelekileyo impazamo yesiphaluka esifutshane semibala emibini ebangelwa yi-single-phase grounding kunye nokuqhuma kwe-zinc oxide arrester okubangelwa yi-arc grounding overvoltage.
7. Ukuba isinyithi sisekelwe, i-voltage yoqhagamshelwano kunye ne-voltage yesinyathelo ingancitshiswa kakhulu, ehambelana nokuqinisekisa ukhuseleko lomntu (i-metal grounding ingamiselwa ukuba isixhobo sisebenza ngokweemfuno zomsebenzisi);
8. Ukuba isetyenziswe kwigridi yamandla ehlanganiswe ikakhulu yimigca ephezulu, i-vacuum contactor iya kuvala ngokuzenzekelayo emva kwemizuzwana emi-5 yokusebenza kwesixhobo.Ukuba kukungaphumeleli okomzuzwana, inkqubo iya kubuyela kwimeko yesiqhelo.Kwimeko yokungaphumeleli okusisigxina, isixhobo siya kusebenza kwakhona ukukhawulela ngokusisigxina ukugqithisa.
9. Xa impazamo ye-PT yoqhawulo lwenzeka kwisixokelelwano, isixhobo siya kubonisa umahluko wesigaba sempazamo yoqhagamshelo kunye nokukhupha isignali yoqhagamshelwano ngexesha elinye, ukuze umsebenzisi akwazi ukutshixa ngokuthembekileyo isixhobo sokhuseleko esinokusilela ngenxa yoqhagamshelo lwe-PT. .
10. Ubuchwephesha besixhobo obubodwa “besokethi esikrelekrele (i-PTK)” bunokucinezela ngokupheleleyo ukwenzeka kweresonance ye-ferromagnetic, kwaye bukhusele ngokufanelekileyo iplatinam ekutshisweni, ugqabhuko-dubulo kunye nezinye iingozi ezibangwa kukurhawuka kwenkqubo.
11. Isixhobo sixhotyiswe ngesokethi ye-RS485, kwaye samkela iprothokholi yonxibelelwano yeMODBUS esemgangathweni ukuqinisekisa imowudi yokuhambelana phakathi kwesixhobo kunye nazo zonke iinkqubo zokucupha ividiyo, kunye nokugcina imisebenzi yokuhanjiswa kwedatha kunye nolawulo olukude.
Imisebenzi eyongezelelweyo yokucinezelwa kwe-arc ekrelekrele kunye nesixhobo sokuphelisa i-harmonic:
1. Umsebenzi wokukhetha okuzenzekelayo unokuqwalaselwa ngokweemfuno zomsebenzisi
2. Isixhobo esincinci sokukhetha umgca wesiseko se-HYLX sangoku esiphuhliswe yinkampani yethu ikakhulu ikhetha umgca ngokwe-amplitude ye-zero-sequence current xa inkqubo isekelwe.Iyaloyisa ukungabikho kokuchaneka okuphantsi komgca wokukhetha xa isantya somgca wokukhetha sicotha kwaye i-arc isekelwe kwisixhobo esiqhelekileyo somgca wokukhetha.
3. Umsebenzi wokuphelisa (ukususa) i-resonance (vibration) unokumiselwa ngokweemfuno zomsebenzisi;
4. Isiguquli samandla ombane esichasene nokusasaza esiphuhliswe yinkampani yethu sinokulungiswa ukuba sihambelane nesixhobo sokurhoxisa se-harmonic esisezantsi, esitshabalalisa imeko ye-ferromagnetic resonance kwaye inqande "iplatinam evuthayo" kunye "nokudubula kweplatinam" okubangelwa yi-resonance overvoltage ACCIDENT. .
5. Isixhobo sokuphelisa i-microcomputer se-harmonic sinokumiselwa ngokweemfuno zomsebenzisi ukuphelisa i-ferromagnetic resonance.
Ixesha lokuposa: Apr-13-2023