2023-11-13
Iyini indima yabavikeli be-solar DC?Ngicabanga ukuthi abaklami abaningi bakagesi bacace kakhulu.Umbani njengenhlekelele yemvelo engathi sína, ukuvela kombani-okubangelwa i-overvoltage overcurrent yesikhashana kulula kakhulu ukubangela ukulimala kwemishini kagesi yesakhiwo, ikakhulukazi imishini kagesi, okuholela ekulahlekelweni kwezomnotho okuqondile nokungaqondile ebhizinisini.Ngakho-ke, ukuvikelwa kombani nokuvikelwa kokuphepha kubuchwepheshe bokuvikela ukukhuphuka sekuphenduke indawo eshisayo yamanje.Ngakho-ke, abavikeli bokuhlinzwa be-DC kufanele babe kanjani ukukhetha?
Ngokuthuthuka kobuchwepheshe, imikhiqizo ye-elekthronikhi iya ngokuya ihlukahluka, futhi ukusetshenziswa kwayo kuya ngokuya kusakazeka.Kodwa-ke, izinga lokumelana nomthamo kagesi okhuphukayo lale mikhiqizo ye-elekthronikhi ngokuvamile liphansi kunalelo lamadivayisi okusabalalisa amandla kagesi aphansi, ngakho-ke asengozini yokuguquguquka kagesi, okungukuthi, umonakalo ovela kuma-voltages akhuphukayo.Lokhu okubizwa ngokuthi i-surge, okubuye kwaziwe ngokuthi yi-transient overvoltage, ukushintshashintsha kwe-voltage kwesikhashana okwenzeka kusekethe futhi kungahlala cishe ingxenye eyisigidi yesekhondi kusekethe, njengesimo sezulu sombani, umbani ungaqhubeka nokukhiqiza amandla kagesi. ukushintshashintsha kwesekethe.
Isistimu yesekethe engu-220V izokhiqiza ukuguquguquka kwamandla kagesi okuhlala njalo okungafinyelela ku-5000 noma ku-10000V, okwaziwa nangokuthi ukuqhuma noma ukweqisa kwesikhashana.Izindawo eziningi zombani e-China, kanye nombani njengento ebalulekile ekukhiqizeni i-voltage yokuqhuma emgqeni, ngakho-ke kuyadingeka ukuqinisa ukuvikeleka kombani ohlelweni lokusabalalisa lwamandla aphansi.
Umvikeli wokuhlinzwa we-SPDleso sivikeli se-overvoltage, isimiso sokusebenza siwukuthi lapho intambo yamandla, ulayini wokudlulisa isignali udlula ugesi omningi, isivikelo sokuhlinza sizoba ngumbhobho we-overvoltage ukuze sibeke umkhawulo kagesi ebangeni lamandla kagesi angakwazi ukumelana nawo, ngaleyo ndlela kuvikelwe okokusebenza ekushaqekeni kwamandla kagesi.
Umvikeli wokuhlinza ezimweni ezijwayelekile, esimweni sokumelana okuphezulu, akukho ukuvuza kwamanje;lapho kune-overvoltage kumjikelezo, umvikeli ohlinzayo uzoqalwa ngesikhathi esifushane kakhulu, ukuvuza kwamandla okungaphezulu kwe-overvoltage, ukuvikela imishini;i-overvoltage iyanyamalala, umvikeli ohlinzayo ukubuyisela isimo sokumelana okuphezulu, ngeke kuthinte ukunikezwa kwamandla okujwayelekile nhlobo.
Njengamanje, ukuklanywa komvikeli we-solar surge we-dc kusenamaphutha amaningi ekwakhiweni kwangempela kubangele izinkinga eziningi, futhi kwaze kwabangela ukuba iphrojekthi ibambezeleke, kanje:
1) Incazelo yomklamo ilula kakhulu, incazelo ayivezwanga ngokucacile, futhi izidingo zokufaka azicacile ngokwanele, ezingabangela kalula ukungaqiniseki okuningi ngesikhathi sokwakha futhi kungabangela umonakalo noma ukulahlekelwa komnotho emishinini kagesi okufanele ibe nayo. kuvikelwe.
2) Idizayini yesivikeli se-DC surge ayiguquguquki ngokwanele, futhi kwesinye isikhathi isetshenziswa ngokuqondile emidwebeni yokwakha engaguquki yokuvikela umbani, engasuselwe ohlelweni oluphansi lohlelo lokusabalalisa lomklamo oqondisiwe, ingaholela kumvikeli ohlinzayo kuzintambo ezithile. amaphutha okufaka.
3) kumdwebo wesistimu yokusabalalisa, amapharamitha wokuklama isivikeli sokuhlinza awaphelele, njengeleveli yokuvikela i-voltage UP, noma ngabe ubufakazi bokuqhuma, i-voltage ephezulu yokusebenza ye-Uc namanye amapharamitha abalulekile ayakhekile, noma amanye amapharamitha awanembile. , okuholela ekusebenzeni kwangempela kokwehluleka kwesivikeli sokuhlinza noma ukulimala kwezinto zikagesi.
4) Imininingwane yedizayini ayinamininingwane.Ngokuvamile, ukuba nencazelo eningiliziwe yedizayini yesivikeli sokuhlinza sencwadi yokuklama, njengokubuka konke kwephrojekthi yokwakha, isisekelo somklamo, noma ngabe ukufakwa kwamasistimu olwazi lwe-elekthronikhi, izinga lokuvikelwa kwedivayisi yomvikeli wokuhlinza.
I-1) Incazelo yedizayini yomvikeli we-SPD ohlinzayo: ukubuka konke kwephrojekthi, ukuhlukaniswa kwesakhiwo sokuvikela umbani, isisekelo sokuklama, izinhlelo zolwazi lwe-elekthronikhi, izinga lokuvikela umbani, uhlelo lokumisa phansi, indlela ikhebula elingena ngayo ekhaya, izidingo zokumelana nesisekelo, njll.
2) Faka kuhlu indawo yokufakwa kwesivikeli sokuhlinza, inombolo yebhokisi likagesi, izinga lokuvikela, inombolo, imingcele eyisisekelo (i-discharge current In or inrush current limp, i-voltage ephezulu yokusebenza engu-Uc, izinga lokuvikela i-voltage Up), njll. .
Isistimu ye-low-voltage distribution pull ground system ine-IT, TT, TN-S, TN-CS amafomu amane, ngakho isivikeli sokuhlinza se-SPD kufanele sisekelwe ohlelweni oluhlukile lokumisa isistimu yokusabalalisa i-low-voltage bese ukhetha umdwebo wezintambo ohlukile, isibonelo, uma usebenzisa isistimu yokusabalalisa amandla ye-TN AC, imigqa yokusabalalisa ephuma ebhokisini lokusabalalisa eliphelele esakhiweni kuzodingeka isebenzise isistimu yokubeka phansi ye-TN-S.
Lapho izintambo zamandla e-low-voltage zisuka kugridi yekhebuli ephansi yesihlangu esingaphezulu noma ikhebula egqitshiwe, ayikwazi ukufakwa isivikeli sokuhlinza se-SPD.Futhi lapho zonke noma ingxenye low-voltage amandla imigqa for imigqa phezulu, futhi indawo ukuduma izinsuku ezingaphezu kuka 25d / a, lesi sikhathi ukufaka abavikeli surge ukuvimbela overvoltage eduze imigqa amandla ngenxa ukwethulwa umbani impulses, ukuze izinga le-overvoltage lingaphansi kuka-2.5kV.
Idivayisi yokuvikela i-Surge ngokuvamile ifakwe kugesi emugqeni ongenayo, indawo yokufakwa kwayo ingaba amadivaysi kagesi angaphakathi, kodwa futhi esimweni somnyango wezokuthutha kazwelonke wavuma ukufakwa kulayini wamandla oseduze kusuka esakhiweni, lokho i, ifakwe kulayini ongaphezulu kulayini wekhebula.Uma okokusebenza kwe-elekthronikhi ngokumelene ne-overvoltage kunezidingo eziphakeme, noma ukweqisa kuzoholela emiphumeleni emibi kakhulu, njengokukwazi ukudala ukuqhuma noma ngisho nomlilo, noma okokusebenza kwe-elekthronikhi okubalulekile ukumelana nomthamo we-overvoltage uphansi kakhulu, kodwa futhi udinga ukwandisa ukufakwa kwezivikeli zokuhlinza.
Kusistimu yokusabalalisa i-low-voltage ukukhetha idivayisi yokuvikela ukuhlinza kwe-DC lapho izici eziyinhloko okufanele zicatshangelwe zimi kanje:
(1) Nquma izinga lokuvikela amandla kagesi Ekuphakameni kwesivikeli sokuhlinza se-DC.Izinga lokuvikela i-voltage Up libhekisela ku-voltage ephezulu kuzo zombili iziphetho zesivikeli sokuhlinza esikalwa lapho isenzo samanje esikhiphayo, ngokuvamile sihlukaniswa ngamaleveli angu-2.5, 2, 1.8, 1.5, 1.2, 1.0, iyunithi ye-kV.Ukuze uvimbele okokusebenza kukagesi ukuthi kungalinyazwa ukweqisa kwamandla kagesi, siqale sicabangele ukuthi amandla kagesi okumelana nezinto ezivikelwe kufanele abe makhulu kuneleveli yokuvikela i-voltage Ephezulu yesivikeli sokuhlinza.
(2) umshini wokuvikela ohlinzayo usebenzisa imodi yokuvikela egcwele.Okungukuthi, ku-L-PE, LN kanye ne-LL line efakwe phakathi komvikeli ohlinzayo ukuze kudlale ukuvikelwa okuphelele komugqa, okungavikela i-pulse yombani kungakhathaliseki ukuthi yimuphi umugqa phakathi kwe-overvoltage, kuzokwenza ukuthi imishini kagesi isebenze ngempumelelo. kuvikelwe.Ngasikhathi sinye, ukuvulwa kwemodi yokuvikela egcwele yomvikeli ohlinzayo kungakhishwa ngasikhathi sinye amandla ukuze kugwenywe ukuqala komvikeli ohlinzayo emehlukweni obangelwa ukulimala kwawo, ngaleyo ndlela kwandise impilo yomvikeli wokuhlinzwa.
(3) Khetha umkhawulo ophezulu we-voltage esimeme yokusebenza i-Uc yesivikeli sokuhlinza.I-voltage yokusebenza esimeme ephezulu ibhekisa ku-voltage ephezulu engasetshenziswa ngokuqhubekayo kusivikeli sokuhlinza ngaphandle kokudala izinguquko ezicini zesivikeli sokuhlinza futhi iqhube isivikeli sokuhlinzwa.
(4) Khetha umkhawulo ofanele wokukhipha amandla wesivikeli sokuhlinza ngokuya nezici zemvelo zesayithi.Ubukhulu bamanje bokukhishwa busho ukuthi umvikeli ohlinzayo angadlula kuphela igagasi lamanje lamagagasi angu-8/20μs kabili ngaphandle kokulimala kumvikeli wokuhlinzwa.Eqinisweni, umvikeli we-DC ohlinzayo unomthamo omkhulu wokukhipha.
Umvikeli we-SPD Surge nakuba ukuvikelwa kwemishini ye-elekthronikhi emonakalweni we-overvoltage kuye kwadlala indima enkulu kakhulu, kodwa ngenxa yokuthi i-overvoltage ekhiqizwayo ngezinye izikhathi ingase idlule ububanzi bomvikeli ohlinzayo, ngakho-ke lapho umvikeli ohlinzayo esebenza isikhathi eside esimweni sokugcwala ngokweqile, izophinde ilimale ngamazinga ahlukahlukene, lezi zithinteka kakhulu impilo yesevisi yomvikeli wokuhlinza.Isibonelo, uma i-overvoltage yesikhashana iphezulu kakhulu, isivikeli sokuhlinza singase sibhodloze futhi sibangele ukujikeleza okufushane okubucayi, njengoba kuboniswe esithombeni.
Uma idivayisi yokuvikela ukuhlinzwa ingaxhunywanga ochungechungeni nge-breaker circuit, i-line breaker D1 izohamba ngokuzenzakalelayo, njengoba i-lcc yephutha yamanje isekhona, kuphela ngemva kokuba umvikeli ohlinzayo eshintshiwe, i-breaker circuit short D1 izovala kabusha, ukuze uhlelo lulahlekelwe ukuqhubeka kokunikezwa kwamandla.Isixazululo sale nkinga ukuxhuma i-circuit breaker ochungechungeni nesiphetho esiphezulu somvikeli ohlinzayo , ukukhetha i-circuit breaker elinganiselwe okwamanje ngokusho kokukhishwa okuphezulu kwamanje komvikeli ohlinzayo ukuze i-breaker circuit isebenze kahle, futhi ijika eligingqikayo lamukela uhlobo C, futhi umthamo walo wokuphuka kufanele ube mkhulu kunomkhawulo wamanje wesiyingi esifushane ekufakweni.Njengoba kuboniswe kuthebula:
| IMAX(kA) | Uhlobo Lwejika | Okwamanje(A) |
| 8-40 | C | 20 |
| 65 | C | 50 |
Okuvamile i-miniature circuit breaker breaking current ayinkulu kune-10kA, ithebula lingabonwa ngokukhethwa kwe-miniature circuit breaker kunzima ukuhlangabezana nomthamo wokuphuka kufanele kube mkhulu kunomkhawulo wamanje we-short-circuit wamanje ekufakweni.Ngakho-ke, ukusetshenziswa kwamafuse ukuvikela umvikeli ohlinzayo kuyisinqumo esifanele!
I-surge voltage isabalele.Ngokwezibalo, ukwanda kwe-overvoltage kwenzeka njalo ngemizuzu engu-8 kugridi kazwelonke, futhi u-20% -30% wokuhluleka kwekhompyutha kubangelwa amandla okushisa, ngakho-ke umklamo wokuvikela ukukhuphuka udingeka kakhulu.Idizayini yokuvikela i-Surge idizayini evimbelayo, okuwukuphela kwendlela yokuvikela okokusebenza kwethu emonakalweni we-overvoltage kancane ngangokunokwenzeka.Idizayini yedivayisi yokuvikela ukuhlinza kwe-solar DC kufanele icubungule ngokujulile izici ezihlukahlukene ezinethonya.Kungale ndlela kuphela lapho umvikeli ohlinzayo angadlala indima enkulu yokuvikela futhi avikele ngempumelelo imishini ye-elekthronikhi emonakalweni we-overvoltage.
I-Dongguan Slocable Photovoltaic Technology Co.,LTD.
Engeza:Guangda Manufacturing Hongmei Science and Technology Park, No. 9-2, Hongmei Section, Wangsha Road, Hongmei Town, Dongguan, Guangdong, China
TEL:0769-22010201
