I-inverter iyidivayisi yokulungisa amandla eyakhiwe ngamadivayisi e-semiconductor, asetshenziswa kakhulu ukuguqula amandla e-DC abe amandla e-AC.Ivamise ukuhlanganisa i-boost circuit kanye ne-inverter bridge circuit.I-boost circuit ithuthukisa i-DC voltage yeseli yelanga ku-DC voltage edingekayo ekulawuleni okuphumayo kwe-inverter;i-inverter bridge circuit iguqula i-boosted DC voltage ibe i-AC voltage nefrikhwensi evamile ngokulinganayo.
I-inverter, eyaziwa nangokuthi isilawuli samandla, ingahlukaniswa ibe amandla azimele kanye nokusetshenziswa okuxhunywe kugridi ngokuya ngokusetshenziswa kwe-inverter ohlelweni lokukhiqiza amandla e-photovoltaic.Ngokwendlela yokuguqula i-waveform, ingahlukaniswa ibe yi-square wave inverter, i-step wave inverter, i-sine wave inverter, kanye ne-inverter yezigaba ezintathu ezihlanganisiwe.Kuma-inverters asetshenziswa ezinhlelweni ezixhunywe kugridi, angahlukaniswa abe ama-inverters ohlobo lwe-transformer kanye nama-inverters angaphansi kwe-transformer ngokuya ngokuthi kukhona i-transformer.Imingcele eyinhloko yezobuchwepheshe ye-solar photovoltaic inverter yilezi:
1. I-voltage ephumayo elinganiselwe
Isiguquli se-photovoltaic kufanele sikwazi ukukhipha inani le-voltage elinganiselwe ngaphakathi kwebanga lokuguquguquka elivumelekile le-voltage ye-DC ecacisiwe.Ngokuvamile, lapho i-voltage elinganiselwe yokuphumayo iyisigaba esisodwa esingu-220v nesigaba sesithathu esingu-380v, ukuchezuka kokuguquguquka kwamandla kagesi kucaciswa kanje.
(1) Uma isebenza ngendlela enganyakazi, ngokuvamile kudingeka ukuthi ukuchezuka kokuguquguquka kwamandla kagesi kungeqi ku-±5% yenani elilinganiselwe.
(2) Lapho umthwalo ushintshwa ngokuzumayo, ukuchezuka kwe-voltage akudluli ± 10% yenani elilinganiselwe.
(3) Ngaphansi kwezimo ezijwayelekile zokusebenza, ukungalingani kokuphuma kwamandla kagesi ezigaba ezintathu yi-inverter akufanele kudlule u-8%.
(4) Ukuhlanekezelwa kwe-voltage waveform (i-sine wave) yokuphuma kwezigaba ezintathu ngokuvamile kuyadingeka ukuthi kungadluli u-5%, futhi okuphumayo kwesigaba esisodwa akufanele kudlule u-10%.
(5) Ukuchezuka kwefrikhwensi ye-AC voltage ephumayo ye-inverter kufanele ibe ngaphakathi kwe-1% ngaphansi kwezimo ezijwayelekile zokusebenza.Imvamisa kagesi okukhiphayo ecaciswe ku-Gb/t ejwayelekile kazwelonke 19064-2003 kufanele ibe phakathi kuka-49 no-51hz.
2. Layisha amandla factor
Usayizi wesici samandla okulayisha ukhombisa ikhono le-inverter ukuthwala umthwalo ongenisayo noma umthwalo we-capacitive.Ngaphansi kwesimo se-sine wave, isici samandla okulayisha singu-0.7 kuya ku-0.9, futhi inani elilinganiselwe lingu-0.9.Endabeni yamandla athile omthwalo, uma isici samandla se-inverter siphansi, umthamo odingekayo we-inverter uzokhula, okuholela ekwandeni kwezindleko.Ngesikhathi esifanayo, amandla abonakalayo wesifunda se-AC sesistimu ye-photovoltaic ayanda, futhi ukwanda kwamanje kwesifunda.Uma kukhulu, ukulahlekelwa kuzokwanda nakanjani, futhi ukusebenza kahle kwesistimu nakho kuzokwehla.
3. Okukhiphayo okulinganiselwe kwamanje kanye namandla okukhiphayo alinganiselwe
Isilinganiso sokuphumayo samanje sibhekisela kumthamo ophumayo olinganiselwe we-inverter ngaphakathi kwebanga lesici samandla esibekiwe, iyunithi iyi-;umthamo wokuphumayo olinganiselwe ubhekisela kumkhiqizo we-voltage elinganiselwe ephumayo kanye nesilinganiso sokuphumayo samanje se-inverter lapho isici samandla okukhiphayo singu-1 (okungukuthi umthwalo oqinile ophikisayo), iyunithi yi-kva noma i-kw.
Isikhathi sokuthumela: Jul-15-2022