I-Inverter iwuhlobo lwedivayisi yokulungisa amandla eyakhiwe ngamadivayisi we-semiconductor, ikakhulukazi asetshenziselwa ukuguqula amandla e-DC abe amandla e-AC, ngokuvamile akhiwa i-boost circuit kanye ne-inverter bridge circuit.I-boost circuit ikhulisa i-DC voltage yeseli yelanga ku-DC voltage edingwa isilawuli sokuphuma kwe-inverter;Isekhethi yebhuloho le-inverter iguqula i-boosted DC voltage ibe imvamisa evamile ye-AC voltage ngokulinganayo.
I-inverter, eyaziwa nangokuthi isilawuli samandla, ingahlukaniswa ngezinhlobo ezimbili zokunikezwa kwamandla okuzimele kanye negridi exhunywe ngokusetshenziswa kwe-inverter ohlelweni lokukhiqiza amandla e-photovoltaic.Ngokwemodi ye-waveform modulation, ingahlukaniswa ibe yi-square wave inverter, i-step wave inverter, i-sine wave inverter kanye ne-inverter yezigaba ezintathu ezihlanganisiwe.Ukuze inverter esetshenziswa ohlelweni grid-exhunywe, ngokusho khona noma ukungabikho transformer zingahlukaniswa transformer uhlobo inverter kanye transformer uhlobo inverter.Imingcele eyinhloko yezobuchwepheshe ye-solar photovoltaic inverter yilezi:
1. I-voltage ephumayo elinganiselwe
Isiguquli se-pv kufanele sikwazi ukukhipha i-voltage elinganiselwe phakathi kwebanga lokuguquguquka elivunyelwe le-voltage ecacisiwe ye-dc.Ngokuvamile, lapho i-voltage elinganiselwe yokuphumayo iyisigaba esisodwa esingu-220v nesigaba sesithathu esingu-380v, ukuchezuka kokuguquguquka kwamandla kagesi kunalezi zinhlinzeko ezilandelayo.
(1) Ekusebenzeni kwesimo esingaguquki, ukuchezuka kokuguquguquka kwamandla kagesi ngokuvamile kuyadingeka ukuthi kungadluli u-± 5% yenani elilinganiselwe.
(2) Ukuchezuka kwamandla kagesi akumele kudlule ku-± 10% yenani elilinganiselwe uma kwenzeka ukuguqulwa komthwalo.
(3) Ngaphansi kwezimo ezijwayelekile zokusebenza, izinga elingalingani lokuphuma kwamandla kagesi wesigaba sesithathu se-inverter akufanele lidlule u-8%.
(4) Ukuhlanekezela kwesigaba sesithathu se-voltage waveform (sine wave) akufanele kudlule u-5%, futhi ukuphuma kwesigaba esisodwa akufanele kudlule u-10%.
(5) I-inverter ephumayo ye-AC voltage frequency ngaphansi kwezimo ezijwayelekile zokusebenza ukuchezuka kwayo kufanele kube phakathi kuka-1%.Imvamisa kagesi okukhiphayo ecaciswe ku-gb/t ejwayelekile kazwelonke 19064-2003 kufanele ibe phakathi kuka-49 no-51hz.
2, ukulayisha amandla factor
Isici samandla okulayisha sibonisa umthamo we-inverter enomthwalo we-inductive noma umthwalo we-capacitive.Ngaphansi kwezimo ze-sine wave, isici samandla okulayisha sisuka ku-0.7 siye ku-0.9, futhi isilinganiso singu-0.9.Endabeni yamandla athile omthwalo, uma isici samandla se-inverter siphansi, umthamo we-inverter odingekayo uzokhula, okuholela ekwenyukeni kwezindleko, ngesikhathi esifanayo, amandla abonakalayo esistimu ye-photovoltaic AC loop iyanda, i ukukhuphuka kwamanje kwe-loop, ukulahlekelwa kuzokwanda nakanjani, futhi ukusebenza kahle kwesistimu kuzokwehla.
3. Ukukhishwa okulinganiselwe okwamanje kanye nomthamo
Okukhiphayo okulinganiselwe okwamanje kubhekisela kumthamo ophumayo olinganiselwe we-inverter ngaphakathi kwebanga lesici samandla esibekiwe (iyunithi: A).Umthamo wokuphumayo olinganiselwe uwumkhiqizo we-voltage elinganiselwe ephumayo kanye nesilinganiso sokuphumayo samanje se-inverter lapho isici samandla esiphumayo singu-1 (okungukuthi, umthwalo oqinile ophikisayo), ku-KVA noma kW.
Isikhathi sokuthumela: Aug-20-2022
