Kwi-3-35kV yaseTshayina yonikezelo lwamandla kunye nenkqubo yokuhambisa, uninzi lwendawo engathathi hlangothi ayisekelwanga.Ngokwemigangatho yoshishino kazwelonke, xa i-single-phase grounding isenzeka, inkqubo inokusebenza ngokungaqhelekanga kwiiyure ze-2, ezinciphisa kakhulu iindleko zokusebenza kunye nokuphucula ukuthembeka kwenkqubo yokunikezelwa kwamandla kunye nokusabalalisa.Nangona kunjalo, ngenxa yokuphuculwa okuqhubekayo komthamo wombane wenkqubo, imowudi yokunikezelwa kwamandla iguquka ngokuthe ngcembe ukusuka kumgca wokuhambisa ukuya kumgca wentambo, kwaye ukuhamba kwangoku ukusuka kwinkqubo ukuya kwi-capacitor yendlela kuya kuba kukhulu kakhulu.Xa inkqubo iphantsi kwesigaba esisodwa, ukukhuselwa kwangoku kwe-capacitor akulula ukucacisa, kwaye iguqulwa ibe yinkqubo yokumisa okuphakathi.Ukugqithiswa kwenkqubo ekhuselayo yokumisa kunye ne-ferromagnetic parallel resonance overvoltage ebangelwa ku-overvoltage kuya kubeka emngciphekweni ukusebenza ngokukhuselekileyo kwegridi yamandla.I-overvoltage yesigaba sesibini sokukhusela inkqubo yokukhusela ibaluleke kakhulu, kwaye inqanaba lokugqithiswa kwesigaba sokungaphumeleli komatshini yi-3 ukuya ku-3.5 amaxesha awo onke ama-voltages esigaba sokusebenza esiqhelekileyo.Ukuba ukugqithisa okuphezulu okunjalo kwenzeka kwigridi yamandla kwiiyure ezininzi, ngokuqinisekileyo kuya kulimaza ukufakwa kwezixhobo zombane.Emva kokuqokelela ngokuphindaphindiweyo kunye nomonakalo we-insulation layer yezixhobo zombane, kuya kubangela indawo ebuthathaka yomgangatho wokugquma, kubangele inkqubo ephosakeleyo yokumisa i-insulation layer, kwaye ibangele iingozi zokusilela kwesekethe enemibala emibini.Ukongeza, iya kubangela iingozi zokhuseleko ezinje ngokusilela komgangatho wokugquma wesixhobo sombane (isitshixo kukusilela komgangatho wokugquma wemoto), ukuqhuma kweentambo, indawo yokukhupha i-PT ye-voltage transformer saturation excitation regulator, ukuqhuma kombane. i-high-voltage arrester, njl. Ukuze kulungiswe ingxaki yokugqithiswa kwe-voltage ebangelwa yinkqubo yexesha elide yokukhusela umbane, i-coil yokucinezela i-arc isetyenziselwa ukuhlawula i-current ye-neutralization capacitor, kunye nethuba lokukhusela impazamo yombane. icinezelwe.Injongo yale ndlela kukususa photoelectricity.Okwangoku, akucaci ukuba i-coil yokunciphisa i-arc ngokwayo ineempawu ezininzi, kwaye ayikwazi ukuhlawulela ngokufanelekileyo i-capacitive current, ngokukodwa umonakalo owenziwe kwizixhobo zamandla eziphezulu ze-voltage awukwazi ukuhlawulwa ngokuthanda.Ngokwesiseko sophando lwezenzululwazi kwiindandatho ezahlukeneyo zokucinezelwa kwe-arc, inkampani yethu iphuhlise izixhobo ezikrelekrele zokucinezela i-arc ye-HYXHX.
Umda wosetyenziso lwesixhobo socinezelo se-arc esikrelekrele:
1. Esi sixhobo sifanelekile kwi-3 ~ 35KV inkqubo yamandla ombane ophakathi;
2. Esi sixhobo sifanelekile kwisistim sombane apho indawo engathathi hlangothi ingagxininiswanga, indawo engathathi hlangothi igxininiswe nge-coil yokucinezela i-arc, okanye indawo engathathi hlangothi isekelwe ngokuchasana okuphezulu.
3. Esi sixhobo sifanelekile kwiigridi zamandla kunye neentambo njengomzimba oyintloko, i-hybrid power grids kunye neentambo kunye neentambo eziphezulu njengomzimba oyintloko, kunye neegridi zamandla ezineentambo eziphezulu njengomzimba oyintloko.
Iimpawu zobuchwephesha zesixhobo esikrelekrele sokucinezela i-arc:
Umlawuli wamkela izakhiwo ezine ze-CPU, enye yentsebenziswano yomntu kunye nokunxibelelana kwexesha langempela, enye isampuli kunye nokubala, enye yolawulo lwesignali yemveliso ukuqinisekisa ukuchaneka kweempawu zemveliso, kunye nokurekhoda iphutha.
Iimpawu zeSoftware:
1. Inkqubo yexesha lokwenyani yokwenza imisebenzi emininzi (RTOS):
Uphuhliso lwesoftware lwamkela inkqubo yokusebenza ngexesha lokwenyani kunye nomsebenzi wethala leencwadi leengcaphephe ezinamandla, kwaye lujolise kwisimbo sokucwangcisa imisebenzi yemihla ngemihla, kwaye lenze ulwabiwo lwezibonelelo, ukucwangcisa umsebenzi, ukuphatha ngaphandle kunye neminye imisebenzi ngokuhambelana nemowudi yenkonzo ephambili.Isebenza ngokuthembekileyo kwaye inokusebenzisa ngokupheleleyo ukusebenza kweeprosesa zesignali yedijithali kunye ne-microprocessors.Ulwimi lwekhompyutha oluchazayo lukhawuleza ukuphunyezwa, lufundeka ngcono, kwaye kulula ukwandisa nokutshintshwa.
2. Iprothokholi yonxibelelwano eqhelekileyo yeMODUS:
Iprothokholi esemgangathweni yonxibelelwano yeMODBUS yamkelwa ukuququzelela ukufikelela kwiinkqubo ezahlukeneyo ezizenzekelayo ezidibeneyo ezizenzekelayo.I-microprocessor yonxibelelwano eyahlukileyo ikhethiwe ukuze iphucule ngakumbi isakhono sokunxibelelana kunye nesantya sonxibelelwano.
Emva kokuba isixhobo sivuliwe, sinokubuyiselwa kwindawo ekude.
3. Ukusebenzisa iDSP esebenza kakhulu:
Inxalenye yesampulu kunye nokubala ikhetha itshiphu ye-TMS320F2812DSP ye-TI Inkampani.Isantya esiphezulu ukuya kuthi ga kwi-150MHz.
Ngokutsho kweprogram yekhompyutheni, umqondiso we-analog oqokelelwe ngexesha langempela unokuguqulwa ngokukhawuleza u-Fourier utshintshwe ngexesha elifutshane, kwaye i-pulse current inokufumaneka kwaye ilinganiswe ngexesha langempela.
I-4.14-bit yeetshaneli ezininzi ngaxeshanye isampulu yedijithali ukuya kwi-analog converter:
Ngenxa yokuba inkqubo ifuneka ukuba ibe nesampulu echanekileyo, i-AD ikhetha iibhithi ezili-14.Kukho amajelo asi-8 ewonke.Zonke iikholamu zetshaneli ezi-4 zisebenzisa iintengiso ngaxeshanye ukuphucula ukuchaneka kokusetyenziswa.I-CLK yangaphandle ye-AD yi-16M, ngaloo ndlela iqinisekisa i-64-point sampling kunye neemfuno zokubala zomjikelo ngamnye wesampulu yethu.
5. Ukusebenzisa izixhobo ezicwangcisekileyo:
Imisebenzi yezixhobo zemveli igxininiswe kwi-chip enye, eyanciphisa indawo ye-substrate kunye nenani leepads, inciphisa ubude bebhasi, iphucula ukusebenza kokuphazamiseka kunye nokuthembeka kwesiphaluka, kunye nokuphucula ukuguquguquka ngexesha elifanayo.
Yonke inkqubo yesoftware isebenzisa ii-ALTERA EPM7128 ezimbini njengenxalenye yengqiqo yedijithali.Le chip inokuphinda ihlelwe kwakhona, enamasango angama-2500 kunye neeseli ze-macro ezingama-128, ezinokuhlangabezana neemfuno zengqiqo enzima kakhulu.Ukusetyenziswa kwe-ic edibeneyo kunciphisa kakhulu inani lezixhobo ze-logic ezizimeleyo ezifunwa yinkqubo yedijithali, kwaye iphucula ukuthembeka kunye nokhuseleko lwenkqubo.
6. Umsebenzi wokurekhoda impazamo:
Irekhoda yempazamo inokurekhoda i-8 fault waveforms kwi-cyclical system, kubandakanywa i-voltage yesigaba sesithathu sasekhohlo nasekunene, i-voltage ye-zero-sequence, i-zero-sequence current, i-contactor yesigaba sesithathu se-AC kunye ne-circuit breaker ngaphambi nangemva kwempazamo eyenzekayo.
7.Ujongano lomatshini woluntu lwamkela umboniso omkhulu wekristale yolwelo kunye nemenyu epheleleyo yamaTshayina ukubonisa ubungakanani bemeko yangoku ngendlela yomzobo, ixesha lokwenyani kunye nexabiso lamandla ombane elikwinqanaba elithathu, ixabiso lombane lesigaba esinguziro, kunye nenqanaba elinguziro langoku. ixabiso.
Iimpawu eziphambili zesixhobo
1. Isantya sesenzo sesixhobo sikhawuleza, kwaye sinokusebenza ngokukhawuleza ngaphakathi kwe-30 ~ 40ms, esinciphisa kakhulu ixesha le-arc yesigaba esisodwa;
2. I-arc inokucima ngokukhawuleza emva kokuba isixhobo sisebenze, kwaye i-arc grounding overvoltage inokunciphisa ngokufanelekileyo ngaphakathi koluhlu lombane lomgca;
3. Emva kokuba isixhobo sisebenze, vumela i-capacitive current yenkqubo ukuba idlule ngokuqhubekayo ubuncinane kwiiyure ze-2, kwaye umsebenzisi unokujongana nomgca ophosakeleyo emva kokugqiba ukutshintshwa kokutshintshwa komthwalo;
4. Umsebenzi wokukhusela isixhobo awuchaphazeleki kwisikali kunye nemodi yokusebenza yegridi yamandla;
5. Isixhobo sinomsebenzi ophezulu weendleko zokusebenza, kwaye i-voltage transformer kuyo inokubonelela ngezibonakaliso ze-voltage ye-metering kunye nokukhusela, ithathe indawo ye-PTA giants;
6. Isixhobo sixhotyiswe ngesixhobo esincinci sokukhetha umgca wesiseko sangoku, esinokuphucula kakhulu ukuchaneka kokukhethwa komgca ngokusebenzisa iimpawu zenguqu enkulu ye-zero-sequence yangoku yomgca wephutha ngaphambi nangemva kokuba i-arc icinyiwe.
7. Isixhobo samkela indibaniselwano ye-anti-saturation i-voltage transformer kunye ne-eliminator ekhethekileyo yangoku yokunciphisa i-resonance eliminator, enokuthi ngokusisiseko icinezele i-ferromagnetic resonance kwaye ikhusele ngokufanelekileyo ukujonga;
8. Isixhobo sinomsebenzi we-arc light grounding fault wave recording, ukubonelela ngedatha kubasebenzisi ukuba bahlalutye iingozi.
Amacandelo aphambili esixhobo kunye neempawu zabo:
1. I-vacuum ye-high-voltage vacuum ngokukhawuleza i-JZ kunye nolawulo lokwahlula isigaba;
Le yi-AC ekhawulezayo yokudibanisa i-vacuum ephuhliswe ngokukodwa yinkampani yethu enokulawulwa ngokuhlukana kwesigaba, kwaye inokufakwa ekusebenzeni ngokwahlukileyo kwi-8 ~ 12ms.Esinye isiphelo se-vacuum contactor sidibaniswe nebhasi, kwaye esinye isiphelo sisekelwe ngokuthe ngqo.Ngethuba lokusebenza okuqhelekileyo, i-JZ ivuliwe kwaye ivaliwe phantsi kolawulo lomlawuli we-microcomputer.Iisekethe zamandla ezisebenzayo ze-vacuum contactors zesigaba ngasinye zitshixiwe ngokufanayo.Xa nasiphi na isigaba sivala isixhobo sayo sokumisa ibhasi, ezinye izigaba ezibini azisayi kusebenza.
Umsebenzi we-JZ kukukhusela izixhobo zenkqubo kwimpembelelo yokugqithisa ngokukhawuleza ngokutshintshela kwi-arc engazinzanga kwisiseko esizinzileyo sesinyithi esithe ngqo xa i-arcing grounding isenzeka kwinkqubo.
2. Isithuba esikhulu se-HYT esikhusela uqhushumbo esingenawo amandla okukhusela;
Umthamo omkhulu we-HYT woqhushumbo-ubungqina bokulondolozwa-free overvoltage umkhuseli wenza umda ukugqithiswa kwenkqubo.Yahlukile kwisakhiwo se-zinc oxide arrester (MOA) ngokubanzi kwaye ineenzuzo ezilandelayo:
(1) Izinga lokuhamba okukhulu kunye noluhlu olubanzi lwesicelo;
(2) Indlela yokudibanisa iinkwenkwezi ezine inokunciphisa kakhulu ukugqithisa kwesigaba ukuya kwisigaba kunye nokuphucula kakhulu ukuthembeka kokukhusela;
(3) I-high-capacity zinc oxide non-linear resistor kunye ne-gap yokukhupha ikhuselana.I-gap yokukhupha yenza isantya sokutshaja se-ZnO non-linear resistance resistance zero, i-ZnO i-non-linear resistance ayithobi, iimpawu ezingabonakaliyo ze-ZnO zokuchasana ezingabonakaliyo aziyi kubuyela emva emva kokuba i-gap yokukhupha ivuliwe, i-gap yokukhupha ayiwenzi umsebenzi woxinzelelo lwe-arc, kwaye ubomi bemveliso buphuculwe
(4) Isalathiso sokunyuka kwamandla ombane si-1, kwaye intlawulo kunye nokukhutshwa kwamandla ombane ziyafana phantsi kweefomathi ezahlukeneyo zombane, kwaye aziyi kuchaphazeleka ngeendlela ezahlukeneyo zokusebenzisa amaza ombane.Ixabiso elichanekileyo lokukhusela i-overvoltage kunye nokusebenza okugqwesileyo kokukhusela
(5) Ixabiso elikhawulezayo lentlawulo kunye nokukhutshwa lisondele kwi-voltage eseleyo, kwaye akukho nto yokunqunqa, enenzuzo ukukhusela i-insulation layer yezixhobo zokujija.
(6) Isakhiwo silula kwaye sicacile, umthamo uncinci, kwaye ukufakela kukulungele;
Isithuba esikhulu sokudubula-ubungqina bokulondolozwa-free overvoltage mkhuseli yeyokuqala yohlobo lwayo ukunciphisa ukugqithisa kwazo zonke iintlobo.Ngaphambi kokuba i-AC contactor JZ ingasebenzi, i-overvoltage ilinganiselwe ngaphakathi koluhlu lokhuseleko.
3. I-HYXQ ephambili yangoku yokunciphisa i-harmonic eliminator:
I-HYXQ yimveliso eyenziwe yinkampani yethu.Ifakwe kuthotho phakathi kwendawo ephambili engathathi hlangothi ye-voltage transformer kunye nomhlaba ukucinezela uthotho lwe-ferromagnetic resonance ye-voltage transformer kunye nokuphucula into yokhuseleko yokusebenza kwegridi yamandla.
Ekusebenzeni okuqhelekileyo, ukuchasana malunga ne-40kΩ, kwaye ukuchasana kwe-primary winding ye-PT yinqanaba le-megohm, ngoko ke akuyi kuchaphazela imisebenzi eyahlukeneyo ye-PT, kwaye ayiyi kutshintsha kakhulu iiparitha ezahlukeneyo zenkqubo.Xa i-PT ihlanjululwa, i-core yensimbi ihlutha, i-excitation current ye-primary winding inyuka, kwaye ukuchasana kwe-MQYXQ kwanda ngokukhawuleza, okunokuthi kudlale umphumo omhle wokudambisa.
I-HYXQ inesakhiwo esilula nesicacileyo, ubunzima obulula, ukufakela okufanelekileyo kunye nokusebenza okuthembekileyo.Iyakwazi ukugcina ukucocwa kwangoku ngokuqhubekayo kunye nokukhawuleza kwe-pulse;ubukhulu be-series resonance overvoltage, i-pulse yangoku yokucoca ixesha elifutshane;le mveliso inokunciphisa ukunyuka ngokukhawuleza kwe-excitation current ye-primary winding ye-voltage transformer, kwaye igweme i-current ebangelwa yi-primary winding ye-voltage transformer.Ngenxa yoko, amandla e-kinetic we-circuit breaker ayanelanga ukucima i-arc emva kokuba i-breaker circuit ixutywe, okubangelwa ukusilela kwe-short-circuit ukhuseleko kwingozi yebhasi.
4. Umlawuli weMicrocomputer ZK:
I-ZK yinxalenye yolawulo oluphambili lwesi sixhobo.Imisela indawo yesiphoso kunye nohlobo lwempazamo (uqhawulo lwe-transformer olunokubakho, ukumisa isinyithi, kunye ne-arc grounding) ngokusekwe kwi-Ua, Ub, Uc, kunye ne-U yeempawu ezibonelelwa yi-voltage transformer, kwaye ilawula unxibelelwano lwe-vacuum ephezulu-voltage ngendlela esetwe kwangaphambili. Isixhobo JZ.
Ukunyanzeliswa kweentandane kunye nokukhethwa komgca kunokudibaniswa ukufezekisa injongo yokulungelelaniswa okuphakathi phakathi kokukhethwa komgca kunye nokukhethwa komgca.
5. Ifuse yokunciphisa amandla ombane aphezulu ngoku FU:
I-FU ngumkhuseli wogcino kuzo zonke izixhobo, ezinokuthi ziphephe ingxaki yokusilela kombane omfutshane wemibala emibini obangelwa ziingcingo ezingalunganga okanye iimpazamo zokusebenza.Inezi mpawu zilandelayo:
(1) Umthamo omkhulu wokuqhawula, ukuya kuthi ga kwi-63KA;
(2) Ukuqhekeka kwesekethe ngokukhawuleza, ixesha lokuqhawula isiphaluka li-1 ~ 2ms;
(3) Ukukhawulelana kwangoku kulula ukuyisebenzisa, kwaye i-fault current yesiqhelo inokulinganiselwa ngaphantsi kwe-1/5 ye-short-circuit i-fault impulse current enkulu;
6. Isiguquli samandla ombane esikhethekileyo se-PT nesincedisi somoya wesibini:
Isixhobo sisebenzisa i-transformer ekhethekileyo ye-anti-saturation voltage.Xa kuthelekiswa neziguquli zombane eziqhelekileyo, ayinako ukubonelela ngokufanelekileyo kuphela imiqondiso yombane ozinzileyo kumlinganiselo wenkqubo kunye nolawulo, kodwa iyazikhusela ngokuthembekileyo kwiingozi ezinjengomonakalo we-voltage transformer kunye nokutshiswa okubangelwa yi-resonance nonlinear system.
Ixesha lokuposa: Apr-12-2023