Nhanganyaya
Sezvo kutorwa kwe photovoltaic (PV) kunowedzera, mamwe mapurojekiti ari kutarisanazero-export zvinodiwa. Zvishandiso zvinowanzorambidza simba rezuva rakawandisa kuti rirege kuyerera richidzokera mugedhi, kunyanya munzvimbo dzine ma transformer akazara, muridzi asina kujeka wekodzero dzekubatanidza grid, kana mitemo yakasimba yemhando yemagetsi. Gwaro rino rinotsanangura nzira yekuisaanti-reverse (zero-export) magetsi mamita, mhinduro dzepakati dziripo, uye magadzirirwo akakodzera eakasiyana PV system saizi uye maapplication.
1. Mafungiro Akakosha Usati Waiswa
Mandatory Scenarios eZero-Export
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Transformer saturation: Kana matransformer emuno ave kutoshanda pakakwirira, reverse simba rinogona kukonzera kuwandisa, kugumburwa, kana kutadza kwemidziyo.
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Kuzvishandisa wega (hapana gidhi rekutengesa rinobvumidzwa): Mapurojekiti asina grid feed-mumvumo anofanirwa kushandisa ese anogadzirwa simba munharaunda.
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Simba rekuchengetedza hutano: Reverse simba rinogona kuunza DC zvikamu, harmonics, kana mitoro isina kuenzana, kuderedza grid mhando.
Pre-Instalation Checklist
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Kuenderana nemudziyo: Ita shuwa kuti chiyero chemita chinoenderana nehukuru hwePV system (imwe-chikamu ≤8kW, matatu-chikamu> 8kW). Tarisa inverter kutaurirana (RS485 kana yakaenzana).
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Environment: Nekumisikidzwa kwekunze, gadzirira nzvimbo dzinodzivirira mamiriro ekunze. Kune akawanda-inverter masisitimu, ronga RS485 bhazi wiring kana Ethernet data concentrators.
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Kuteerera uye kuchengeteka: Simbisa iyo grid yekubatanidza poindi nechishandiso, uye tarisa kuti kuremerwa kwemhando inofanana inotarisirwa chizvarwa chePV.
2. Core Zero-Export Solutions
Solution 1: Simba Limiting kuburikidza neInverter Control
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Principle: Iyo smart mita inoyera chaiyo-nguva yazvino kutungamira. Kana reverse kuyerera kwaonekwa, mita inotaurirana kuburikidza neRS485 (kana mamwe maprotocol) neinverter, iyo inoderedza simba rayo rekubuda kusvika kunze kwenyika = 0.
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Shandisa makesi: Transformer-yakazara nzvimbo, kuzvidyira mapurojekiti ane mitoro yakagadzikana.
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Zvakanakira: Yakareruka, yakaderera-mutengo, mhinduro inokurumidza, hapana chikonzero chekuchengetedza.
Solution 2: Mutoro Absorption kana Energy Storage Integration
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Principle: Iyo mita inotarisisa ikozvino pane grid yekubatanidza nzvimbo. Panzvimbo yekudzikamisa iyo inverter inobuda, simba rakawandisa rinoendeswa kumasisitimu ekuchengetedza kana mitoro yekurasa (semuenzaniso, maheater, maindasitiri emidziyo).
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Shandisa makesi: Mapurojekiti ane mitoro yakasiyana-siyana, kana uko kukwidziridza PV chizvarwa chiri pamberi.
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Zvakanakira: Inverters inogara muMPPT maitiro, simba harina kuparara, yakakwirira system ROI.
3. Installation Scenarios by System Size
Single-Inverter Systems (≤100 kW)
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Configuration: 1 inverter + 1 bidirectional smart mita.
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Meter position: Pakati pe inverter AC kubuda uye main breaker. Hapana mimwe mitoro inofanirwa kubatana pakati.
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Wiring order: PV inverter → Yezvino Shandura (kana ikashandiswa) → Smart magetsi mita → Main breaker → Yemuno mitoro / Gridhi.
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Logic: Iyo mita inoyera kutungamira uye simba, ipapo inverter inogadzirisa inobuda kuti ienderane nemutoro.
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Benefit: Easy wiring, mutengo wakaderera, mhinduro inokurumidza.
Multi-Inverter Systems (>100 kW)
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Configuration: Multiple inverters + 1 smart simba mita + 1 data concentrator.
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Meter position: Pane yakajairika grid coupling poindi (zvese inverter zvinobuda zvakasanganiswa).
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Wiring: Inverter zvinobuda → Bhazibha → Bidirectional mita → Data concentrator → Main breaker → Giridhi/Mitoro.
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Logic: Iyo data concentrator inounganidza mita data uye inogovera mirairo kune yega yega inverter zvakaenzana.
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Benefit: Scalable, centralized control, inoshanduka parameter marongero.
4. Kuiswa mune Different Project Types
Kuzvidyira Chete Zvirongwa
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Zvinodiwa: Hapana gidhi kunze kwenyika inobvumidzwa.
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Meter position: Pakati pe inverter AC yakabuda uye yemunharaunda mutoro breaker. Hapana shanduko yekubatanidza grid inoshandiswa.
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Check: Kuedza pasi pechizvarwa chakazara pasina mutoro - inverter inofanira kuderedza simba kusvika zero.
Transformer Saturation Projects
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Zvinodiwa: Grid yekubatanidza inobvumidzwa, asi reverse simba rinorambidzwa zvachose.
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Meter position: Pakati pe inverter kubuda uye grid yekubatanidza breaker.
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Logic: Kana reverse simba rakaonekwa, iyo inverter inogumira kubuda; se backup, mabreaker anogona kudimbura kudzivirira kushushikana kwetransformer.
Traditional Self-Consumption + Grid Export Projects
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Zvinodiwa: Kutengesa kunze kunobvumidzwa, asi kwakaganhurirwa.
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Kugadziriswa kwemamita: Anti-reverse mita yakaiswa munhevedzano ine utility's bidirectional billing mita.
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Logic: Iyo anti-reverse mita inodzivirira kunze kwenyika; chete kana yakundikana iyo yekushandisa mita inorekodha feed-in.
5. FAQs
Q1: Iyo mita pachayo inomira reverse kuyerera here?
Kwete. Meta inoyera kwainoenda simba uye inoshuma. Iyo inverter kana controller inoita chiito.
Q2: Iyo system inogona kukurumidza sei kuita?
Kazhinji mukati memasekonzi 1-2, zvichienderana nekumhanya kwekutaurirana uye inverter firmware.
Q3: Chii chinoitika panguva yekutadza kwetiweki?
Nhaurirano yemunharaunda (RS485 kana kutonga kwakananga) kunovimbisa kuenderera mberi kwekuchengetedzwa kunyangwe pasina internet.
Q4: Mamita aya anogona kushanda mukupatsanura-chikamu masisitimu (120/240V)?
Ehe, mamwe mamodheru akagadzirirwa kubata kupatsanurwa-chikamu masisitimu anoshandiswa muNorth America.
Mhedziso
Zero-export kutevedza kuri kuita zvekusungirwa mumapurojekiti mazhinji ePV. Nekuisa anti-reverse smart magetsi emagetsi panzvimbo chaiyo uye nekuabatanidza nemainverters, dump loads, kana kuchengetedza,EPCs, makondirakiti, uye vanogadzirainogona kuunza inovimbika, inoteedzera-inoteedzera solar masisitimu. Iyi mhinduro kwete chetechengetedza gridasiwowedzera kuzvidyira uye ROIkune vashandisi vekupedzisira.
Nguva yekutumira: Sep-07-2025