Taw qhia
Raws li photovoltaic (PV) saws nrawm, ntau txoj haujlwm tau ntsibxoom-export cov cai. Cov khoom siv hluav taws xob feem ntau txwv tsis pub lub hnub ci ntau dhau los ntawm kev ntws rov qab mus rau hauv daim phiaj, tshwj xeeb tshaj yog nyob rau hauv cov cheeb tsam uas muaj cov khoom siv hluav taws xob txaus, tsis paub meej cov tswv cuab ntawm cov cai sib txuas, lossis cov cai nruj zog. Phau ntawv qhia no piav qhia yuav ua li cas rau nruabanti-reverse (zero-export) fais fab ntsuas, cov kev daws teeb meem tseem ceeb muaj, thiab cov kev teeb tsa zoo rau qhov sib txawv PV qhov ntau thiab tsawg thiab kev siv.
1. Kev txiav txim siab tseem ceeb ua ntej kev teeb tsa
Yuav tsum tau Scenario rau Zero-Export
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Transformer saturation: Thaum lub tshuab hluav taws xob hauv zos twb tau ua haujlwm ntawm lub peev xwm siab, lub zog rov qab tuaj yeem ua rau overload, tripping, lossis khoom siv tsis ua haujlwm.
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Kev siv tus kheej nkaus xwb (tsis muaj daim phiaj xa tawm tso cai): Tej yaam num uas tsis muaj daim phiaj pub-nyob rau hauv kev pom zoo yuav tsum tau siv tag nrho cov generated zog hauv zos.
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Kev tiv thaiv hluav taws xob zoo: Rov qab fais fab tuaj yeem qhia txog DC cov khoom, kev sib haum xeeb, lossis cov khoom tsis sib npaug, ua kom cov kab sib chaws qis dua.
Pre-Installation Checklist
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Ntaus ntawv compatibility: Xyuas kom lub ntsuas ntsuas qhov muaj peev xwm sib npaug ntawm PV system loj (ib theem ≤8kW, peb theem> 8kW). Xyuas inverter kev sib txuas lus (RS485 los yog sib npaug).
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Ib puag ncig: Rau kev teeb tsa sab nraum zoov, npaj cov ntaub thaiv huab cua. Rau ntau lub tshuab inverter, npaj rau RS485 tsheb npav thaiv lossis Ethernet cov ntaub ntawv concentrators.
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Kev ua raws cai thiab kev nyab xeeb: Txheeb xyuas qhov sib txuas ntawm kab sib txuas nrog cov khoom siv hluav taws xob, thiab xyuas tias cov khoom thauj khoom sib tw yuav tsum muaj PV tiam.
2. Core Zero-Export Solutions
Tshuaj 1: Fais fab txwv ntawm Inverter Control
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Txoj Cai: Lub ntsuas ntsuas ntse ntsuas lub sijhawm tam sim no kev taw qhia. Thaum rov qab ntws tau pom, lub ntsuas hluav taws xob sib txuas lus ntawm RS485 (los yog lwm yam kev cai) nrog lub inverter, uas txo nws cov zis hluav taws xob kom txog thaum xa tawm = 0.
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Siv cov ntaub ntawv: Transformer-saturated thaj chaw, kev siv tus kheej ua haujlwm nrog cov khoom ruaj khov.
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Qhov zoo: Yooj yim, tsis tshua muaj nqi, teb ceev, tsis xav tau kev cia.
Kev daws 2: Load Absorption lossis Energy Storage Integration
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Txoj Cai: Lub ntsuas ntsuas ntsuas tam sim no ntawm qhov sib txuas ntawm kab sib chaws. Tsis txhob txwv qhov tso zis ntawm inverter, lub zog ntau dhau yog hloov mus rau cov tshuab khaws cia lossis cov khoom pov tseg (piv txwv li, cua sov, khoom siv hauv tsev).
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Siv cov ntaub ntawv: Tej yaam num uas muaj peev xwm sib txawv heev, los yog qhov uas ua rau PV ntau tshaj plaws yog qhov tseem ceeb.
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Qhov zoo: Inverters nyob hauv MPPT hom, lub zog tsis nkim, siab dua ROI.
3. Kev teeb tsa ntawm qhov system loj
Ib-Inverter Systems (≤100kW)
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Kev teeb tsa1 inverter + 1 bidirectional ntse meter.
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Meter txoj hauj lwm: Nruab nrab ntawm lub inverter AC tso zis thiab lub ntsiab breaker. Tsis muaj lwm yam kev thauj khoom yuav tsum tau txuas nrog hauv nruab nrab.
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Kev txiav txim xaim: PV inverter → Tam sim no Transformers (yog siv) → Ntse zog ntsuas → Main breaker → Local loads / Grid.
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Logic: Lub ntsuas ntsuas ntsuas kev taw qhia thiab lub zog, tom qab ntawd lub inverter kho cov zis kom phim cov load.
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Tau txais txiaj ntsig: Kev xaim yooj yim, tus nqi qis, teb ceev ceev.
Multi-Inverter Systems (> 100 kW)
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Kev teeb tsa: Ntau lub inverters + 1 lub ntsuas hluav taws xob ntse + 1 cov ntaub ntawv concentrator.
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Meter txoj hauj lwm: Ntawm cov kab sib txuas sib txuas (tag nrho cov inverter outputs ua ke).
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Kev xaim: Inverter outputs → Busbar → Bidirectional meter → Data concentrator → Main breaker → Grid / Loads.
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Logic: Cov ntaub ntawv concentrator sau cov ntaub ntawv ntsuas thiab faib cov lus txib rau txhua lub inverter proportionally.
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Tau txais txiaj ntsig: Scalable, centralized tswj, hloov pauv parameter nqis.
4. Kev teeb tsa hauv ntau hom phiaj xwm
Kev siv tus kheej nkaus xwb Projects
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Kev xav tau: Tsis muaj daim phiaj export tso cai.
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Meter txoj hauj lwm: Nruab nrab ntawm inverter AC tso zis thiab lub zos load breaker. Tsis siv daim phiaj sib txuas.
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Tshawb xyuas: Kuaj nyob rau hauv tag nrho tiam uas tsis muaj load - inverter yuav tsum txo hwj chim mus rau xoom.
Transformer Saturation Projects
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Kev xav tau: Daim phiaj kev sib txuas tau tso cai, tab sis rov qab fais fab nruj txwv tsis pub.
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Meter txoj hauj lwm: Nruab nrab ntawm inverter tso zis thiab daim phiaj kev sib txuas breaker.
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Logic: Yog kuaj pom lub zog rov qab, lub inverter txwv cov zis; Raws li kev thaub qab, cov khoom tawg tuaj yeem txiav tawm kom tsis txhob muaj kev ntxhov siab ntawm kev hloov pauv.
Ib txwm siv nws tus kheej + Daim phiaj Export Projects
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Kev xav tau: Export tso cai, tab sis txwv.
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Kev teeb tsa Meter: Anti-reverse meter ntsia tau rau hauv series nrog cov nqi hluav taws xob bidirectional nqi ntsuas.
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Logic: Anti-reverse meter tiv thaiv kev xa tawm; tsuas yog nyob rau hauv cov ntaub ntawv ntawm tsis ua hauj lwm lub utility meter sau feed-in.
5. FAQs
Q1: Puas yog lub 'meter' nws tus kheej nres rov qab ntws?
Tsis yog. Lub 'meter' ntsuas fais fab kev taw qhia thiab qhia nws. Lub inverter lossis maub los ua haujlwm.
Q2: Lub kaw lus tuaj yeem cuam tshuam sai npaum li cas?
Feem ntau hauv 1-2 vib nas this, nyob ntawm kev sib txuas lus ceev thiab inverter firmware.
Q3: Dab tsi tshwm sim thaum lub network tsis ua haujlwm?
Kev sib txuas lus hauv zos (RS485 lossis kev tswj ncaj qha) ua kom muaj kev tiv thaiv txuas ntxiv txawm tias tsis muaj internet.
Q4: Cov ntsuas no puas tuaj yeem ua haujlwm hauv cov kab ke sib cais (120/240V)?
Yog lawm, qee cov qauv tsim los tswj cov txheej txheem sib cais siv hauv North America.
Xaus
Zero-export ua raws li yuav tsum tau ua nyob rau hauv ntau PV tej yaam num. Los ntawm kev txhim kho cov khoom siv hluav taws xob tiv thaiv rov qab ntawm qhov chaw raug thiab sib koom ua ke nrog inverters, pov tseg loads, lossis cia,EPCs, cov neeg cog lus, thiab cov tsim tawmtuaj yeem xa cov kev txhim khu kev qha, kev cai-ua raws hnub ci tshuab. Cov kev daws teeb meem no tsis yog xwbtiv thaiv kab sib chawstab sis kujua kom nws tus kheej noj thiab ROIrau cov neeg siv kawg.
Post lub sij hawm: Sep-07-2025