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Isishwankathelo seMiba yoMbane kwi-Photovoltaic Inverters

Kwigridi ye-photovoltaic eqhagamshelwe ii-inverters, kukho ezininzi iiparameters zobugcisa be-voltage: ubuninzi be-voltage ye-DC, uluhlu lwamandla ombane osebenzayo we-MPPT, uluhlu lwamandla ombane ogcweleyo, i-voltage yokuqala, i-voltage elinganisiweyo, i-voltage ephumayo, njl. Ezi parameters zijolise kuzo kwaye zonke ziluncedo. .Eli nqaku lishwankathela imiba ye-voltage ye-photovoltaic inverters yereferensi kunye notshintshiselwano.

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I-36V-High-Efficiency-Module1

Q: Ubuninzi bombane wokufaka i-DC

A: Ukunciphisa umbane ovulekileyo wesiphaluka ovulekileyo womtya, kuyafuneka ukuba umbane ovulekileyo wesiphaluka ovulekileyo wentambo awukwazi ukudlula ubuninzi be-voltage ye-DC kwiqondo lokushisa elincinci.Ngokomzekelo, ukuba i-voltage yesiphaluka evulekileyo yecandelo yi-38V, i-coefficient yeqondo lokushisa ngu-0.3% / ℃, kunye ne-voltage yesiphaluka evulekileyo yi-43.7V kwi-minus 25 ℃, ngoko ubuninzi beentambo ze-25 zinokuqulunqwa.25 * 43.7=1092.5V.

Umbuzo: Uluhlu lwamandla ombane osebenzayo weMPPT

A: I-inverter yenzelwe ukuziqhelanisa ne-voltage eguqukayo rhoqo yamacandelo.I-voltage yamacandelo iyahluka ngokotshintsho ekukhanyeni kunye nobushushu, kwaye inani lamacandelo adityaniswe kuluhlu nawo kufuneka luyilwe ngokwemeko ethile yeprojekthi.Ke ngoko, i-inverter ibeke uluhlu lokusebenza apho inokusebenza ngokuqhelekileyo.Ubuninzi boluhlu lwe-voltage, ngokubanzi ukusetyenziswa kwe-inverter.

Umbuzo: Uluhlu lombane olupheleleyo

A: Ngaphakathi koluhlu lwe-voltage ye-inverter, inokukhupha amandla alinganisiweyo.Ukongeza ekudibaniseni iimodyuli ze-photovoltaic, kukho nezinye izicelo ze-inverter.I-inverter inomlinganiselo ophezulu wegalelo langoku, njenge-40kW, eyi-76A.Kuphela xa igalelo lombane lidlula i-550V isiphumo sinokufikelela kuma-40kW.Xa i-voltage yegalelo idlula i-800V, ubushushu obuveliswa yilahleko bukhula ngokukhawuleza, okukhokelela kwi-inverter efuna ukunciphisa imveliso yayo.Ke i-voltage yomtya kufuneka iyilwe kangangoko kunokwenzeka embindini woluhlu olugcweleyo lomthamo.

Umbuzo: Ukuqalisa i-voltage

A: Phambi kokuba uqalise i-inverter, ukuba amacandelo awasebenzi kwaye akwimo yesekethe evulekileyo, i-voltage iya kuba phezulu.Emva kokuqala i-inverter, amacandelo aya kuba kwindawo yokusebenza, kwaye i-voltage iya kuncipha.Ukuthintela i-inverter ukuba iqalise ngokuphindaphindiweyo, i-voltage yokuqala ye-inverter kufuneka ibe phezulu kunomthamo omncinci osebenzayo.Emva kokuba i-inverter iqalisiwe, oko akuthethi ukuba i-inverter iya kuba nemveliso yamandla ngokukhawuleza.Inxalenye yolawulo ye-inverter, i-CPU, isikrini kunye nezinye izinto zisebenza kuqala.Okokuqala, i-inverter iyazijonga, kwaye emva koko ijonga amacandelo kunye negridi yamandla.Emva kokuba kungabikho iingxaki, i-inverter iya kuba nemveliso kuphela xa amandla e-photovoltaic edlula amandla okulinda e-inverter.
Awona mandla ombane aphezulu e-DC angaphezulu kunowona mandla ombane osebenzayo weMPPT, kwaye i-voltage yokuqalisa iphezulu kunowona mbane uphantsi wokusebenza weMPPT.Oku kungenxa yokuba iiparamitha ezimbini zombane ophezulu wokufaka igalelo le-DC kunye nokuqaliswa kwamandla ombane zihambelana nemo yesekethe evulekileyo yecandelo, kwaye umbane ovulekileyo wesekethe yecandelo umalunga ne-20% ngaphezulu kombane osebenzayo.

Umbuzo: Uwubona njani umbane ophumayo kunye noqhagamshelo lwegridi yombane?

A: I-voltage ye-DC ayihambelani nombane wecala le-AC, kwaye i-photovoltaic inverter eqhelekileyo inemveliso ye-AC ye-400VN / PE.Ubukho okanye ukungabikho kwe-transformer yodwa akuhambelani nombane ophumayo.I-inverter edibeneyo yegridi ilawula i-current, kwaye i-voltage edibeneyo yegridi ixhomekeke kumbane wegridi.Ngaphambi kokudibanisa igridi, i-inverter iya kubona i-voltage yegridi kwaye idibanise kuphela kwigridi ukuba ihlangabezana neemeko.

Q: Yintoni ubudlelwane phakathi kwegalelo kunye nemveliso yombane?

A: Ingaba amandla ombane wokuphuma kwigridi eqhagamshelwe kwi-photovoltaic inverter ifunyenwe njani njenge-270V?

Uluhlu oluphezulu lokulandelela amandla e-high-power inverter MPPT yi-420-850V, oku kuthetha ukuba amandla aphumayo afikelela kwi-100% xa i-DC voltage i-420V.
I-voltage ephezulu (DC420V) iguqulelwa kwi-voltage esebenzayo yokutshintshana kwangoku, iphindaphindwe yi-coefficient yokuguqulwa ukuze ufumane (AC270V), ehambelana noluhlu lolawulo lombane kunye nomjikelo womsebenzi we-pulse ububanzi becala lemveliso.
Uluhlu lolawulo lwamandla ombane oluyi-270 (-10% ukuya kwi-10%) lu: olona mbane luphezulu lokuphuma kwicala le-DC420V yi-AC297V;Ukufumana ixabiso elisebenzayo le-AC297V AC amandla kunye nombane we-DC (i-peak AC voltage) ye-297 * 1.414 = 420V, ukubalwa kwe-reverse kunokufumana i-AC270V.Inkqubo yile: DC420V DC amandla ilawulwa PWM (pulse ububanzi modulation) emva kokuba ivulwe kwaye icinyiwe (IGBT, IPM, njl.), kwaye ke ihluzwe ukufumana amandla AC.

Umbuzo: Ngaba ii-inverters ze-photovoltaic zifuna ukuhamba nge-voltage ephantsi?

A: Isikhululo samandla ngokubanzi uhlobo lwee-inverters ze-photovoltaic zifuna ukuhamba nge-voltage ephantsi ngomsebenzi.

Xa iziphene zegridi yamandla okanye iziphazamiso zibangela ukuhla kwamandla ombane kwiindawo zoqhagamshelo lwegridi yeefama zomoya, iiinjini zomoya zinokusebenza ngokuqhubekayo phakathi koluhlu lokuhla kwamandla ombane.Kwizityalo zamandla e-photovoltaic, xa iingozi zenkqubo yamandla okanye ukuphazamiseka kubangela ukuhla kwamandla egridi, phakathi koluhlu oluthile kunye nexesha lokuhla kwamandla ombane, izityalo zamandla e-photovoltaic zinokuqinisekisa ukusebenza ngokuqhubekayo ngaphandle kokuqhawula kwigridi.

Q: Yintoni igalelo lombane kwicala le-DC legridi eqhagamshelwe kwi-inverter?

A: Igalelo lombane kwicala le-DC ye-photovoltaic inverter iyahluka ngomthwalo.Igalelo lombane elithile linxulumene ne-silicon wafer.Ngenxa yokumelana okuphezulu kwangaphakathi kweepaneli ze-silicon, xa umthwalo wangoku unyuka, i-voltage yeepaneli ze-silicon iya kuncipha ngokukhawuleza.Ke ngoko, kuyafuneka ukuba ube netekhnoloji ethi ibe yeyona ndawo iphezulu yolawulo lwamandla.Gcina i-voltage ephumayo kunye neyangoku yephaneli ye-silicon kwinqanaba elifanelekileyo ukuqinisekisa ukukhutshwa kwamandla aphezulu.

Ngokuqhelekileyo, kukho umbane oncedisayo ngaphakathi kwe-photovoltaic inverter.Olu ncediso lwamandla ombane lunokuqaliswa xa amandla ombane e-DC afikelela kuma-200V.Emva kokuqalisa, amandla anokunikezelwa kwisiphaluka solawulo lwangaphakathi lwe-inverter, kwaye umatshini ungena kwimodi yokulinda.
Ngokuqhelekileyo, xa igalelo lombane lifikelela kwi-200V okanye ngaphezulu, i-inverter inokuqalisa ukusebenza.Okokuqala, phakamisa igalelo le-DC kwi-voltage ethile, uze uyiguqule kwi-voltage yegridi kwaye uqinisekise ukuba isigaba sihlala sihlala sihlala sihleli, kwaye sidibanise kwigridi.Ii-inverters zihlala zifuna ukuba i-voltage yegridi ibe ngaphantsi kwe-270Vac, kungenjalo ayinakusebenza ngokufanelekileyo.Uxhulumaniso lwegridi ye-inverter lufuna ukuba uphawu oluphumayo lwe-inverter luphawu lomthombo wangoku, kwaye kufuneka luqinisekise ukuba isigaba sokuphuma sihambelana nesigaba se-AC segridi yamandla.


Ixesha lokuposa: May-15-2024