Nrog rau kev loj hlob sai ntawm cov phiaj xwm tshiab txog lub zog xws li cov chaw tsim hluav taws xob photovoltaic (PV), cov tshuab khaws cia hluav taws xob, thiab cov chaw them hluav taws xob rau tsheb fais fab (EV), qhov sib txawv ntawm "DCization" ntawm cov tshuab faib hluav taws xob tau dhau los ua qhov tseem ceeb. Txawm li cas los xij, kev nkag siab yuam kev feem ntau tseem muaj nyob hauv kev xaiv: siv ncaj qha rau AC circuit breakers hauv DC scenarios, ua rau muaj kev phom sij rau kev nyab xeeb xws li arc extinction failure thiab kev tiv thaiv tsis zoo. Ib qho xwm txheej tiag tiag tau pom ib qho chaw khaws cia hluav taws xob raug kev puas tsuaj ntau lab vim yog lub voj voog luv luv los ntawm cov circuit breakers tsis sib xws. Txawm hais tias muaj kev ua haujlwm zoo sib xws hauv qhov tsos, DC thiab AC circuit breakers sib txawv hauv kev tsim qauv, cov txheej txheem kev siv, thiab cov xwm txheej siv. Tsab xov xwm no rhuav tshem lawv qhov sib txawv tseem ceeb thoob plaws 5 qhov ntev los muab cov lus qhia rau kev xaiv cov phiaj xwm tshiab txog lub zog.
Kev Sib Piv Tseem Ceeb: 5 Qhov Ntev Kom Nkag Siab Txog DC vs. AC Circuit Breakers
Cov lus hauv qab no qhia txog ob hom no sib txawv, nrog rau cov lus piav qhia ntxiv los qhia txog qhov cuam tshuam ntawm qhov xwm txheej tshiab ntawm lub zog:
| Kev Sib Piv Qhov Ntev | AC Circuit Breaker | DC Circuit Breaker | Qhov Cuam Tshuam Tseem Ceeb hauv Cov Xwm Txheej Zog Tshiab |
| Arc Extinction Difficulty | AC tam sim no muaj "zero-crossing points" (ib zaug txhua 10ms), ua rau muaj kev ploj ntawm cov arc ntuj nrog cov qauv yooj yim | Tsis muaj qhov chaw hla xoom hauv DC; arcs nyob ntev dua nrog lub zog siab dua, xav tau cov txheej txheem tshwj xeeb extinction (piv txwv li, magnetic blowout, vacuum interrupter) | Qhov hluav taws xob siab/tam sim no hauv cov zog tshiab DC sab (piv txwv li, cov txheej txheem khaws cia hluav taws xob) ua rau muaj kev pheej hmoo ntawm kev tawg arc nrog AC circuit breakers, ua rau muaj kev phom sij rau kev nyab xeeb ntawm cov khoom siv. |
| Cov yam ntxwv ntawm voltage/tam sim no | Hloov kho rau AC sine waves; cov voltages ntsuas feem ntau 220V/380V/10kV | Haum rau DC tam sim no ruaj khov; cov voltages ntsuas txog li 500V/1000V/1500V (tshwj xeeb rau lub zog tshiab) nrog kev tiv thaiv rau "kev cuam tshuam kev hloov pauv" | Cov modules PV txuas nrog series ncav cuag DC voltages tshaj 1000V, qhov twg AC circuit breakers 'voltage tsis txaus withstand peev xwm ua rau insulation breakdown. |
| Kev Tiv Thaiv Kev Xav | Tsom ntsoov rau kev tiv thaiv overload thiab luv luv-circuit; tripping curves raws li AC load yam ntxwv | Ntxiv "kev tiv thaiv polarity," "kev tiv thaiv kev ua tsis tiav ntawm kev sib pauv," thiab "kev tswj hwm tam sim no DC" rau kev tiv thaiv yooj yim | Cov txheej txheem khaws cia hluav taws xob tsim cov hluav taws xob DC thaum lub sijhawm them / tso tawm; AC circuit breakers tsis muaj kev tiv thaiv tsom mus rau, ua rau muaj kev sib tsoo lossis ua tsis tiav. |
| Kev Tsim Kho Vaj Tse | Chav tua hluav taws yooj yim; me me thiab pheej yig | Kev siv zog arc extinction + rwb thaiv tsev tsim; me ntsis loj dua thiab tus nqi siab dua li AC counterparts | Cov phiaj xwm hluav taws xob tshiab xav tau kev nyab xeeb heev; DC circuit breakers cov qauv tshwj xeeb ua kom muaj kev ua haujlwm ruaj khov mus sij hawm ntev |
| Lub Neej Siv Tau Thiab Kev Txij Nkawm | ~10 xyoo lub neej nyob rau hauv AC scenarios nrog cov nqi kho qis | Lub neej ua haujlwm 8-10 xyoo hauv cov xwm txheej DC; yuav tsum tau kuaj xyuas lub chamber arc tsis tu ncua nrog cov qauv kev saib xyuas siab dua | Cov chaw tsim hluav taws xob loj (PV/energy storage plants) muab qhov tseem ceeb rau cov tshuab hluav taws xob DC uas siv tau ntev kom txo tau lub sijhawm tsis ua haujlwm thiab cov nqi kho. |
Cov Lus Piav Qhia Ntxiv:
Cov xwm txheej DC fais fab tshiab (piv txwv li, cov hlua PV, cov roj teeb khaws cia hluav taws xob, cov zis DC ntawm EV charger) muaj "tsis muaj qhov chaw hla xoom, hluav taws xob siab, thiab tam sim no loj" - cov xwm txheej uas tsis yog AC circuit breakers 'arc extinction thiab voltage resistance peev xwm. Qhov no xav tau cov DC circuit breakers tshwj xeeb rau kev siv hluav taws xob tshiab.
Peb cov DC circuit breakers tshiab uas siv hluav taws xob tshwj xeeb siv lub tshuab nqus tsev arc extinction + magnetic blowout technology (arc extinction time ≤2ms) nrog rau cov voltages uas ntsuas tau 500V-1500V, lawv hloov kho tau yooj yim rau PV, kev khaws cia hluav taws xob, thiab EV charging scenarios.
Cov Ntsiab Cai Xaiv Ua Tau Zoo Rau Cov Xwm Txheej Zog Tshiab
1. Xauv Core Direction los ntawm Hom Tam Sim NoCov voj voog DC (piv txwv li, cov hlua PV, cov roj teeb khaws cia hluav taws xob, cov zis DC ntawm lub charger) xav tau cov cuab yeej txiav hluav taws xob DC; cov voj voog AC (piv txwv li, cov zis inverter, cov chaw txuas grid, cov voj voog faib hluav taws xob qis) siv cov cuab yeej txiav hluav taws xob AC - kev siv sib xyaw yog txwv tsis pub ua.
2. Txhim kho kev xaiv los ntawm cov kev teeb tsa ntawm qhov xwm txheej:
①PV Fais Fab: Muab qhov tseem ceeb rau DC circuit breakers nrog "kev hloov pauv hluav taws xob dav dav (500V-1000V) + kev tiv thaiv kev sib txuas rov qab."
② Cov Txheej Txheem Khaws Cia Zog: Xaiv cov qauv nrog "kev tawg sai (≤2ms) + kev tswj hwm tam sim no" kom tsis txhob muaj kev pheej hmoo ntawm lub roj teeb luv luv.
③EV Charging Stations: Xaiv cov "compact + high protection (IP67)" DC circuit breakers rau kev teeb tsa sab nraum zoov.
3. Txo cov kev pheej hmoo nrog Daim Ntawv Pov ThawjXaiv cov khoom lag luam uas ua raws li GB/T 14048.3-2017 (DC circuit breaker tus qauv hauv tebchaws), CE (rau cov lag luam European), thiab UL (rau cov lag luam North American) kom ua tau raws li cov cai ntawm kev ua haujlwm tshiab.
Kev Kawm Txog Qhov Teeb Meem: Kev Pheej Hmoo ntawm Kev Xaiv Tsis Yog piv rau Tus Nqi ntawm Kev Xaiv Yog
Thaum xub thawj, lub chaw tsim hluav taws xob PV 100MW siv cov cuab yeej hluav taws xob AC ntawm sab DC los txiav cov nqi. Tom qab 3 lub hlis ua haujlwm, muaj hluav taws kub los ntawm kev ua tsis tiav ntawm arc extinction, ua rau muaj 2 lab yuan poob nyiaj ncaj qha. Tom qab hloov mus siv cov cuab yeej hluav taws xob DC tshwj xeeb, lub Hoobkas tau ua haujlwm ruaj khov rau 2 xyoos yam tsis muaj qhov tsis zoo. Lwm qhov project khaws cia hluav taws xob siv peb cov cuab yeej hluav taws xob 1500V DC tau ua tiav zam kev pheej hmoo luv luv ntawm 3 lub roj teeb los ntawm kev tawg sai, txo cov nqi kho los ntawm 40% piv rau qhov nruab nrab ntawm kev lag luam. Cov xwm txheej no lees paub tias kev xaiv cov cuab yeej hluav taws xob raug ua kom muaj kev nyab xeeb thiab kev txuag nyiaj mus sij hawm ntev hauv cov xwm txheej hluav taws xob tshiab.
Xaus Lus: Cov Lus Qhia Txog Kev Hloov Pauv + Kev Txhawb Nqa Cov Peev Xwm
Kev nyab xeeb ntawm kev faib hluav taws xob hauv cov haujlwm tshiab pib nrog kev xaiv cov khoom siv hluav taws xob kom raug. Ua tus kws tshaj lij hauv kev daws teeb meem ntawm cov khoom siv hluav taws xob,NEEGmuab ntau yam DC circuit breakers rau PV, khaws cia hluav taws xob, thiab EV charging applications, txhawb nqa kev tsim qauv parameter customized.Thov hu rau peb cov kws pab tswv yim kom tau txais kev pab txhawb nqa dawb rau kev xaiv cov haujlwm tshwj xeeb!
Lub sijhawm tshaj tawm: Lub Ob Hlis-02-2026
