I-inverter sisixhobo sohlengahlengiso lwamandla esinezixhobo zesemiconductor, ezisetyenziswa ikakhulu ukuguqula amandla eDC abe ngamandla e-AC.Ngokuqhelekileyo yenziwe yi-boost circuit kunye ne-inverter bridge circuit.Isekethe yokunyusa inyusa amandla ombane weDC weseli yelanga ukuya kumbane weDC ofunekayo kulawulo lwemveliso ye-inverter;i-inverter bridge circuit iguqula amandla ombane e-DC anyusiweyo abe yi-AC yombane kunye nefrikhwensi eqhelekileyo ngokulinganayo.
I-Inverter, eyaziwa ngokuba ngumlawuli wamandla, inokwahlulwa ibe ngumbane ozimeleyo kunye nokusetyenziswa kwegridi ngokuhambelana nokusetyenziswa kwe-inverter kwinkqubo yokuvelisa amandla e-photovoltaic.Ngokwendlela yokumodareyitha i-waveform, inokwahlulwa ibe yi-square wave inverter, inverter yenyathelo, i-sine wave inverter, kunye nesigaba esithathu sokuguqula inverter.Kwii-inverters ezisetyenziselwa kwiinkqubo ezidityanisiweyo zegridi, ziyakwazi ukwahlula zibe yi-transformer-type inverters kunye ne-transformer-less inverters ngokubhekiselele ekubeni kukho i-transformer.Iiparamitha eziphambili zobuchwepheshe ze-solar photovoltaic inverter zezi:
1. Ixabiso lemveliso yombane
I-photovoltaic inverter kufuneka ikwazi ukukhupha ixabiso elilinganisiweyo lombane ngaphakathi koluhlu oluvumelekileyo lokuguquguquka kombane ochaziweyo we-DC.Ngokubanzi, xa umbane wokuphuma olinganiselweyo ukwinqanaba elinye lama-220v kunye nenqanaba lesithathu le-380v, ukutenxa kokutshintsha kombane kuchazwe ngolu hlobo lulandelayo.
(1) Xa isebenza ngokuzinzileyo, kuyafuneka ngokubanzi ukuba ukutenxa kokutshintsha kombane kungadluli ± 5% yexabiso elilinganisiweyo.
(2) Xa umthwalo uguqulwa ngokukhawuleza, ukuphambuka kombane akudluli ± 10% yexabiso elilinganisiweyo.
(3) Phantsi kweemeko eziqhelekileyo zokusebenza, ukungalingani kwesigaba sesithathu sokukhutshwa kwamandla ombane yi-inverter akufanele kudlule i-8%.
(4) Ukuphazamiseka kwe-voltage waveform (i-sine wave) yesiphumo sesigaba sesithathu siyimfuneko ngokubanzi ukuba singadluli i-5%, kwaye isiphumo sesigaba esisodwa akufanele sidlule i-10%.
(5) Ukutenxa rhoqo kwi-inverter output voltage AC kufuneka ibe ngaphakathi kwe-1% phantsi kweemeko eziqhelekileyo zokusebenza.I-voltage frequency frequency echazwe kumgangatho wesizwe we-Gb/t 19064-2003 kufuneka ibe phakathi kwe-49 kunye ne-51hz.
2. Umthwalo wamandla ombane
Ubungakanani bomthwalo wamandla omthwalo bubonisa ukukwazi kwe-inverter ukuthwala umthwalo we-inductive okanye umthwalo we-capacitive.Ngaphantsi kwemeko ye-sine wave, umthamo wamandla omthwalo ngu-0.7 ukuya kwi-0.9, kwaye ixabiso elilinganisiweyo ngu-0.9.Kwimeko yamandla athile omthwalo, ukuba amandla ombane we-inverter aphantsi, umthamo ofunekayo we-inverter uya kwanda, okubangela ukunyuka kweendleko.Ngelo xesha, amandla abonakalayo esekethe ye-AC yenkqubo ye-photovoltaic iyanda, kwaye i-current circuit iyanda.Ukuba inkulu, ilahleko iya kunyuka ngokuqinisekileyo, kwaye ukusebenza kakuhle kwenkqubo kuya kuncipha.
3. Isiphumo esilinganisiweyo sangoku kunye nomthamo wemveliso
Isiphumo esilinganisiweyo sangoku sibhekisa kwisiphumo esikalisiweyo sangoku se-inverter ngaphakathi koluhlu oluchaziweyo lomthwalo wamandla, iyunithi yi;Umthamo wemveliso olinganisiweyo ubhekiselele kwimveliso yombane wemveliso olinganisiweyo kunye nomlinganiselo wemveliso yangoku ye-inverter xa imveliso yamandla i-1 (okt umthwalo osulungekileyo ochasayo), iyunithi yi-kva okanye kw.
Ixesha lokuposa: Jul-15-2022