Kuhlelo lwase-China lokuphakela nokusabalalisa ugesi lwe-3-35kV, indawo enkulu emaphakathi ayigxilile.Ngokusho kwamazinga emboni kazwelonke, lapho ukumiswa kwesigaba esisodwa kwenzeka, uhlelo lungasebenza ngokungavamile amahora angu-2, okunciphisa kakhulu izindleko zokusebenza futhi kuthuthukise ukuthembeka kwesistimu yokunikezwa kwamandla nokusabalalisa.Kodwa-ke, ngenxa yokuthuthukiswa okuqhubekayo kwamandla okunikezwa kwamandla kwesistimu, imodi yokunikezwa kwamandla kancane kancane ishintsha kusukela kumugqa wokudlulisela kuya kulayini wekhebula, futhi ukugeleza kwamanje kusuka ohlelweni kuya ku-capacitor yomgwaqo kuzoba kukhulu kakhulu.Uma uhlelo lusekelwe esigabeni esisodwa, isivikelo samanje se-capacitor akulula ukusisula, futhi siguqulwa sibe isistimu yokubeka phansi ngezikhathi ezithile.Ukugcwala ngokweqile kwesistimu yokuvikela phansi kanye ne-ferromagnetic parallel resonance overvoltage okubangelwa ukugcwala ngokweqile kuzofaka engozini kakhulu ukusebenza okuphephile kwegridi yamandla.Ukugcwala ngokweqile kwesistimu yokuvikela ephansi yezigaba ezimbili kubi kakhulu, futhi izinga lokugcwala ngokweqile kwesigaba sokuhluleka komshini liphindwe izikhathi ezi-3 kuya kwezingu-3.5 kunawo wonke ama-voltages esigaba sokusebenza esivamile.Uma i-overvoltage ephezulu kangaka kwenzeka kugridi yamandla amahora amaningana, nakanjani izolimaza ukufakwa kwemishini kagesi.Ngemva kokunqwabelana okuphindaphindiwe kanye nokulimala kongqimba olufakwayo lwempahla kagesi, luzobangela iphuzu elibuthakathaka lesendlalelo sokugquma, lubangele uhlelo olunephutha lokumisa ungqimba olufakwa ngaphakathi, futhi lubangele izingozi zokuhluleka kwesifunda esifushane ngemibala emibili.Ngaphezu kwalokho, izophinde ibangele izingozi zokuphepha ezifana nokwehluleka kongqimba lokufakelwa kwezinto zikagesi (okubalulekile ukwehluleka kwe-insulation layer ye-motor), ukuqhuma kwezintambo, indawo yokukhipha i-PT ye-voltage transformer saturation excitation regulator, ukuqhuma high-voltage arrester, njll. Ukuze kuxazululwe inkinga yokweqile okubangelwa uhlelo lwesikhathi eside oluvikela ugesi oluvikelayo, ikhoyili yokucindezela i-arc isetshenziselwa ukunxephezela amandla amanje we-neutralization capacitor, futhi amathuba okuba nokwenzeka kwephuzu elivamile lokuvikelwa kukagesi ecindezelwe.Inhloso yale ndlela ukususa ugesi wesithombe.Njengamanje, akucaci ukuthi ikhoyili yokucindezela i-arc ngokwayo inezici eziningi, futhi ayikwazi ukunxephezela ngempumelelo i-capacitive current, ikakhulukazi umonakalo odalwe kumishini yamandla kagesi aphezulu awukwazi ukunxeshezelwa ngokuthanda kwakhe.Ngokwesisekelo socwaningo lwesayensi ngezindandatho ezihlukahlukene zokucindezela i-arc, inkampani yethu ithuthukise imishini yokucindezela i-arc ehlakaniphile ye-HYXHX.
Ububanzi bokusetshenziswa kwedivayisi ehlakaniphile yokucindezela i-arc:
1. Lo mshini ulungele uhlelo lwamandla kagesi aphakathi kuka-3 ~ 35KV;
2. Lezi zinsiza zifanele uhlelo lokuphakelwa kwamandla lapho indawo emaphakathi ingagxilile, indawo emaphakathi isekelwe ngekhoyili yokucindezela i-arc, noma indawo emaphakathi isekelwe ngenxa yokumelana okuphezulu.
3. Le mishini ifanele amagridi kagesi anezintambo njengomzimba oyinhloko, amagridi kagesi ayingxube anezintambo nezintambo eziphezulu njengomzimba oyinhloko, namagridi kagesi anezintambo eziphezulu njengomzimba oyinhloko.
Izici zobuchwepheshe zedivayisi ehlakaniphile yokucindezela i-arc:
Isilawuli samukela izinhlaka ezine ze-CPU, esokusebenzelana kwabantu kanye nokuxhumana kwesikhathi sangempela, esisodwa esokwenza isampula nokubala, esokuphatha isignali yokuphumayo ukuze kuqinisekiswe ukufaneleka kwamasignali okukhiphayo, nesinye esokurekhoda amaphutha.
Izici zesoftware:
1. Isistimu yokusebenza ye-multitasking yesikhathi sangempela (RTOS):
Ukuthuthukiswa kwesofthiwe kusebenzisa isistimu yokusebenza yesikhathi sangempela nomsebenzi womtapo wolwazi onamandla, futhi kuqondiswe kusitayela sokuhlela semisebenzi yansuku zonke, futhi lenza ukwaba izinsiza, ukuhlela umsebenzi, ukuphatha okuhlukile neminye imisebenzi ngokuhambisana nemodi yesevisi ebaluleke kakhulu.Isebenza ngokwethembeka kakhulu futhi ingasebenzisa ngokugcwele ukusebenza kwamaphrosesa wesignali yedijithali nama-microprocessors.Ulimi lwekhompuyutha oluchazayo luyashesha ukuluqalisa, lufundeka kangcono, futhi kulula ukunwetshwa nokulufakela.
2. Iphrothokholi yokuxhumana ejwayelekile ye-MODBUS:
Iphrothokholi yokuxhumana ejwayelekile ye-MODBUS yamukelwa ukuze kube lula ukufinyelela kumasistimu ahlukahlukene ahlanganisiwe wokuzenzakalela.I-microprocessor ehlukile yokucubungula ukuxhumana ikhethiwe ukuze kuthuthukiswe ikhono lokucubungula ukuxhumana nesivinini sokuxhumana.
Ngemva kokuthi idivayisi yenziwe yasebenza, ingabuyiselwa endaweni ekude.
3. Ukusebenzisa i-DSP esebenza kahle kakhulu:
Ingxenye yesampula nokubala ikhetha i-chip ye-TMS320F2812DSP ye-TI Company.Imvamisa ephezulu ifika ku-150MHz.
Ngokohlelo lwekhompuyutha, isignali ye-analog eqoqwe ngesikhathi sangempela ingashintshwa ngokushesha i-Fourier ngesikhathi esifushane, futhi i-pulse current ingatholwa futhi ikalwe ngesikhathi sangempela.
I-4.14-bit yamashaneli amaningi amasampula ngasikhathi sinye isiguquli sedijithali-kuya-analogi:
Ngenxa yokuthi isistimu iyadingeka ukuze ibe nokunemba kwesampula, i-AD ikhetha amabhithi ayi-14.Kuneziteshi ezingu-8 sezizonke.Wonke amakholomu eziteshi ezi-4 asebenzisa izikhangiso ngesikhathi esifanayo ukuze athuthukise ukunemba kokusetshenziswa.I-CLK yangaphandle ye-AD ingu-16M, ngaleyo ndlela iqinisekisa isampula yamaphuzu angu-64 nezidingo zokubala zomjikelezo ngamunye wamasampula ethu.
5. Ukusebenzisa amadivaysi anengqondo ahlelekayo:
Imisebenzi yemishini yendabuko igxile ku-chip eyodwa, okunciphisa indawo ye-substrate kanye nenani lamaphedi, ifinyeza ubude bebhasi, ithuthukise ukusebenza kokuphikisana nokuphazamiseka kanye nokuthembeka kwesifunda, futhi ithuthukise ukuguquguquka ngesikhathi esifanayo.
Lonke isofthiwe yesistimu isebenzisa i-ALTERA EPM7128 emibili njengengxenye ye-digital logic.Le chip ingahlelwa kabusha, enamasango angu-2500 namaseli angu-128 ama-macro, angahlangabezana nezidingo ze-logic eyinkimbinkimbi kakhulu.Ukusetshenziswa kwe-ic edidiyelwe kunciphisa kakhulu inani lamadivayisi anengqondo azimele adingwa uhlelo lwedijithali, futhi kuthuthukisa ukuthembeka nokuvikeleka kwesistimu.
6. Umsebenzi wokuqopha iphutha:
Irekhoda yephutha ingarekhoda ama-waveform amaphutha angu-8 ohlelweni lokujikeleza, okuhlanganisa i-voltage yezigaba ezintathu kwesokunxele nesokudla, i-voltage elandelanayo engu-zero, i-zero-sequence yamanje, i-AC contactor yezigaba ezintathu kanye ne-circuit breaker ngaphambi nangemva kokwenzeka kwephutha.
7.Isixhumi esibonakalayo somshini womuntu sisebenzisa isibonisi esikhulu sekristalu ewuketshezi kanye nemenyu egcwele yesiShayina ukuze kuboniswe inani lesimo samanje ngendlela enemifanekiso, isikhathi sangempela kanye nevelu yamandla kagesi yezigaba ezintathu enembile, inani lamandla kagesi wesigaba esiyiziro, kanye namandla wesigaba esiyiziro inani.
Izici eziyinhloko zedivayisi
1. Isivinini sesenzo sedivayisi siyashesha, futhi singasebenza ngokushesha phakathi kuka-30 ~ 40ms, okufinyeza kakhulu ubude be-arc yesigaba esisodwa esiphansi;
2. I-arc ingacishwa ngokushesha ngemva kokuba idivayisi isebenze, futhi i-arc grounding overvoltage inganqunywa ngokuphumelelayo ngaphakathi kobubanzi be-voltage yomugqa;
3. Ngemuva kokuthi idivayisi isebenze, vumela i-capacitive current yesistimu ukuthi idlule ngokuqhubekayo okungenani amahora angu-2, futhi umsebenzisi angabhekana nomugqa onephutha ngemva kokuqeda ukusebenza kokushintsha kokudlulisa umthwalo;
4. Umsebenzi wokuvikela wedivayisi awuthintwa isikali kanye nemodi yokusebenza yegridi yamandla;
5. Idivayisi inezindleko zokusebenza eziphezulu zokusebenza, futhi i-voltage transformer ekuyo inganikeza amasignali kagesi wokulinganisa nokuvikela, ithathe indawo ye-PTA giants evamile;
6. Idivayisi ifakwe idivayisi encane yamanje yokukhetha umugqa ophansi, engathuthukisa kakhulu ukunemba kokukhethwa komugqa ngokusebenzisa izici zokuguqulwa kwamanje kokulandelana kukaziro okukhulu komugqa wephutha ngaphambi nangemva kokuba i-arc icishiwe.
7. Lolu cingo lwamukela inhlanganisela ye-anti-saturation voltage transformer kanye nesinqamuleli esikhethekile esinqunyelwe samanje se-resonance, esingacindezela ngokuyisisekelo i-ferromagnetic resonance futhi ivikele ngempumelelo ukubuka;
8. Idivayisi inomsebenzi wokurekhoda iphutha le-arc light grounding fault wave, ihlinzeka ngedatha kubasebenzisi ukuhlaziya izingozi.
Izingxenye eziyinhloko zedivayisi nezici zazo:
1. High-voltage vacuum okusheshayo contactor JZ nge isigaba sokwehlukana control;
Lena i-AC esheshayo ye-vacuum contactor eyenziwe ngokukhethekile yinkampani yethu engalawulwa ngokuhlukaniswa kwesigaba, futhi ingasetshenziswa ngokuhlukana ngo-8~12ms.Ingxenye eyodwa ye-vacuum contactor ixhunywe ebhasini, kanti enye isekelwe ngokuqondile.Ngesikhathi sokusebenza okuvamile, i-JZ ivuliwe futhi ivaliwe ngaphansi kokulawula isilawuli se-microcomputer.Amasekhethi wamandla okusebenza we-vacuum contactors wesigaba ngasinye akhiywe ngokulinganayo.Uma noma yisiphi isigaba sivala idivayisi yaso yokumisa ibhasi yesistimu, ezinye izigaba ezimbili ngeke zisasebenza.
Umsebenzi we-JZ ukuvikela okokusebenza kwesistimu ethonyeni lokugeleza kwe-overvoltage ngokudluliswa ngokushesha ukusuka ekusekelweni kwe-arc okungazinzile kuye endaweni eqondile yensimbi eyizinzile lapho i-arcing grounding kwenzeka ohlelweni.
2. Isivikeli se-HYT esikhulu esivikela ukuqhuma kwe-overvoltage;
Isivikeli se-HYT esinomthamo omkhulu ongaqhumi sisebenza ukuze sikhawulele ukugcwala ngokweqile kwesistimu.Ihlukile kusakhiwo esivamile se-zinc oxide arrester (MOA) futhi inezinzuzo ezilandelayo:
(1) Izinga lokugeleza elikhulu kanye nobubanzi bezicelo;
(2) Indlela yokuxhuma yezinkanyezi ezine inganciphisa kakhulu ukuqhuma kwesigaba-kuya-isigaba futhi ithuthukise kakhulu ukuthembeka kokuvikela;
(3) Umthamo omkhulu we-zinc oxide ongamelani nomugqa kanye negebe lokukhipha ziyavikelana.Igebe lokukhipha lenza izinga lokushaja le-ZnO non-linear resistance resistance liyizero, ukumelana ne-ZnO non-linear akwehlisi, izici ezingekho emgqeni ze-ZnO non-linear ukumelana azibuyeli emuva ngemva kokuba igebe lokuphuma selivuliwe, igebe lokukhipha aliwenzi umsebenzi wokucindezelwa kwe-arc, futhi impilo yomkhiqizo iyathuthukiswa
(4) Inkomba yokukhuphuka kwamandla kagesi ingu-1, futhi amandla kagesi wokushaja nawokukhipha ayafana ngaphansi kwamagagasi amaza kagesi ahlukahlukene, futhi ngeke athintwe amagagasi ahlukahlukene okusebenza okuguquguqukayo.Inani elinembile lokuvikela i-overvoltage nokusebenza okuhle kakhulu kokuvikela
(5) Inani elisheshayo lokushaja nokukhishwa lisondele ku-voltage esele, futhi akukho mkhuba wokunquma, okuzuzisa ukuvikela ungqimba olufakwayo lwemishini yokusonta.
(6) Isakhiwo silula futhi sicacile, ivolumu incane, futhi ukufakwa kulula;
Isivikelo se-overvoltage esingaqhumi esikhaleni esikhulu singesokuqala saso ukukhawulela ukugcwala ngokweqile kwazo zonke izinhlobo.Ngaphambi kokuthi i-AC contactor JZ ingacushwa, i-overvoltage ilinganiselwe phakathi kwebanga lokuphepha.
3. I-HYXQ eyinhloko yamanje ekhawulela i-harmonic eliminator:
I-HYXQ ingumkhiqizo wokusungulwa kwenkampani yethu.Ifakwe ngochungechunge phakathi kwephoyinti eliphakathi nendawo le-voltage transformer kanye nomhlabathi ukuze kucindezelwe i-ferromagnetic resonance yochungechunge lwe-voltage transformer futhi kuthuthukiswe isici sokuphepha sokusebenza kwegridi yamandla.
Ekusebenzeni okuvamile, ukumelana kucishe kube ngu-40kΩ, kanti ukumelana kokuvuthwa okuyinhloko kwe-PT kuyizinga le-megohm, ngakho-ke ngeke kuthinte ukusebenza okuhlukahlukene kwe-PT, futhi ngeke kushintshe kakhulu imingcele ehlukahlukene yohlelo.Lapho i-PT iphindaphinda, i-iron core igcwele, ukuvuswa kwamanje kokuvunguza okuyinhloko kuyanda, futhi ukumelana kwe-MQYXQ kukhula ngokushesha, okungadlala umphumela omuhle wokudambisa.
I-HYXQ inesakhiwo esilula nesicacile, isisindo esincane, ukufakwa okulula nokusebenza okuthembekile.Ingakwazi ukugcina ukushaywa kwe-pulse okuqhubekayo futhi okusheshayo;ukushuba okukhulu kochungechunge lwe-resonance overvoltage, isikhathi sokuhlanza ishayela samanje sibe sifushane;lo mkhiqizo ungakhawulela ukwanda okungazelelwe kwe-excitation current ye-primary winding ye-voltage transformer, futhi ugweme okwamanje okubangelwa ukuvuthwa okuyinhloko kwe-voltage transformer.Ngenxa yalokho, amandla e-kinetic we-circuit breaker awanele ukucisha i-arc ngemva kokuba i-breaker yesifunda ihlanganisiwe, okuholela ekuhlulekeni kwesikhashana kwengozi yokuphepha kwepayipi lebhasi.
4. Isilawuli se-Microcomputer ZK:
I-ZK iyingxenye ebalulekile yokulawula yale mishini.Inquma indawo yephutha kanye nohlobo lwephutha (ukunqanyulwa kwe-transformer okungenzeka kube khona, isisekelo sensimbi, kanye ne-arc grounding) ngokusekelwe kumasiginali we-Ua, Ub, Uc, no-U ahlinzekwa i-voltage transformer, futhi ilawula ukuthintana kwe-vacuum ene-voltage ephezulu ngendlela esethiwe kusengaphambili. Idivayisi ye-JZ.
Ukucindezelwa kwezintandane nokukhetha komugqa kungahlanganiswa ukuze kuzuzwe umgomo wokuxhumana okusesilinganisweni phakathi kokukhethwa komugqa nokukhetha umugqa.
5. I-FU ye-FU:
I-FU iyisivikelo esigciniwe sazo zonke izinto zokusebenza, ezingagwema inkinga yokuhluleka kwe-short-circuit yemibala emibili okubangelwa amaphutha ezintambo noma ukusebenza okungalungile.Inezici ezilandelayo:
(1) Umthamo omkhulu wokuphuka, kuze kufike ku-63KA;
(2) Ukuphulwa kwesifunda okusheshayo, isikhathi sokuphulwa kwesifunda singu-1 ~ 2ms;
(3) Umkhawulo wamanje kulula ukuwusebenzisa, futhi iphutha elivamile lamanje lingakhawulelwa ngaphansi kwe-1/5 yephutha elikhulu le-short-circuit impulse current;
6. I-transformer ekhethekile ye-voltage PT ene-axiliary second winding:
Idivayisi isebenzisa i-transformer ekhethekile ye-anti-saturation voltage.Uma kuqhathaniswa nama-voltage avamile aguquguqukayo, ayikwazi ukunikeza kuphela amasiginali azinzile we-voltage yokulinganisa nokulawula uhlelo, kodwa futhi izivikele ngokuthembekile ezingozini ezifana nokulimala kwe-voltage transformer kanye nokutubeka okubangelwa i-resonance nonlinear yesistimu.
Isikhathi sokuthumela: Apr-12-2023