Uphononongo malunga neTopology kunye nezicelo zoLawulo lweeTransformers ze-Electronic Power ze-Medium-High Voltage II

Ukhetho lweSakhiwo sePET esipheleleyo esi-2

Ii-topologies ze-PET zahlukile kakhulu. Ngokusekelwe kwinani lamanqanaba okuguqulwa kwamandla, anokwahlulwahlulwa abe ziintlobo zesigaba esinye, izigaba ezibini, kunye nezigaba ezintathu [7]. Izakhiwo zezigaba ezibini ziquka ezo zinebhasi ze-DC ezine-voltage ephezulu kunye ne-voltage ephantsi, njengoko kubonisiwe kuMfanekiso 1.

Kwi-PETs zesigaba esinye (Umzobo 1(a)), i-frequency ephakathi/ephezulu Isiguquli sokuZihlukanisa iqhagamshela ii-AC/AC converters kumacala omabini. I-primary-side AC/AC converter iguqula i-input line-frequency AC voltage ibe yi-high-frequency AC voltage, edityaniswe nge-transformer ize iguqulwe ibuyele kwi-line-frequency AC voltage yi-secondary-side AC/AC converter. Ii-single-stage PETs zinezigaba ezimbalwa zokuguqula kunye neenxalenye ezimbalwa, ukusebenza kakuhle, kunye noxinano lwamandla aphezulu. Nangona kunjalo, ukungabikho kwebhasi ye-DC kuyenza ingafanelekanga kwiigridi ze-AC/DC ezixutyiweyo, kwaye ulawulo lokwahlulahlula amandla luyinkimbinkimbi.

IiPET ezinezigaba ezibini zinebhasi yeDC kwicala elinombane ophezulu okanye ophantsi. I-topology kwelinye icala le-transformer yokwahlukanisa ifana neye-PET enesigaba esinye, ngelixa elinye icala liqhagamshela kwibhasi yeDC nge-AC/DC okanye iisekethe zeDC/AC (Umzobo 1(c) kunye nomzobo 1(d)). Ngeekhonkco zeDC ezine-voltage ephezulu okanye ephantsi, iiPET ezinezigaba ezibini zinokuqhagamshela kwigridi zeDC eziphakathi/eziphezulu kwicala elinombane ophezulu okanye kwiinkqubo ze-PV/zokugcina kwicala elinombane ophantsi. Nangona kunjalo, amandla asebenzayo adluliselwa ngabaguquli kumacala omabini e-transformer yokwahlukanisa abuthathaka kakhulu kwiiparameter ze-inductance zokuvuza kwe-transformer. Ukongeza, i-DC bus capacitor ifumana utshintsho olukhulu lwe-voltage yemigca emibini, kwaye utshintsho lwangoku lwe-converter lukhulu [7], okwenza ulawulo lube nzima.

IiPET ezinezigaba ezintathu (Umzobo 1(b)) zineebhasi zeDC kumacala omabini ane-voltage ephezulu nephantsi. Umsinga we-AC ongenayo ulungiswa kwibhasi ye-DC ene-voltage ephezulu ngokuguqulwa kwe-AC/DC, uguqulwe ube ngamaza esikwere ane-frequency ephezulu, udityaniswe necala eline-voltage ephantsi nge-transformer ephakathi/ephezulu, ulungiswe kwibhasi ye-DC ene-voltage ephantsi, kwaye ekugqibeleni uguqulwe kwi-voltage ye-AC ene-frequency ngokuguqulwa kwe-DC/AC. IiPET ezinezigaba ezintathu zinokuqhagamshela kwiinkqubo ze-DC ezine-voltage ephezulu nephantsi. Ulawulo lwesigaba ngasinye sokuguqulwa luzimele, lunceda ukwahlulahlula kunye nolawulo lokubuyisela. Nangona kunjalo, amanqanaba amaninzi okuguqulwa akhokelela kwisakhiwo esinzima kakhulu. Ngenxa yoyilo lwezigaba ezininzi, ii-topology ze-PET ezinezigaba ezintathu zifezekisa ngokulula ukuhla kwe-voltage ephezulu kunye nokuhambelana necala eline-voltage ephantsi, ukuhlangabezana neemfuno zesicelo se-voltage ephakathi/ephezulu. Ke ngoko, ii-topology ezinezigaba ezintathu zezona zisetyenziswa kakhulu kuphando kunye nokusetyenziswa kwe-PET ene-voltage ephakathi/ephezulu.

Kwi-PETs kwizicelo ze-voltage ephakathi/ephezulu, icala le-voltage ephantsi linamanqanaba e-voltage aphantsi anemida emincinci ye-voltage yesixhobo. Ngokwahlukileyo koko, inqanaba lokulungisa i-voltage ephezulu kunye nenqanaba lokuzahlula eliphakathi lijongene namanqanaba e-voltage aphezulu, nto leyo ebeka iimfuno ezingqongqo kwi-topology yesekethe kunye nezixhobo. Uphando olukhoyo lugxile kwiindlela ezimbini: ① Ii-topology ezintsha kunye neendlela zokulawula ii-PETs ze-voltage ephakathi/ephezulu ngokusekelwe kuvavanyo lwe-voltage yesixhobo esikhoyo; ② Ii-topology ze-PET kunye nolawulo olusebenzisa izixhobo ezintsha ze-voltage ephezulu, njengezixhobo ze-10kV SiC [8, 9]. Nangona kunjalo, izixhobo ze-SiC ze-voltage ephezulu zisesekwisigaba se-R&D selabhoratri, kwaye izixhobo zorhwebo azikakwazi ukuhlangabezana neemfuno ze-voltage. Ke ngoko, ii-topology ezininzi ze-cascaded okanye ze-single-module multilevel zisetyenziselwa ukuhlangabezana neemfuno ze-voltage ephezulu yokufaka. Ii-topology eziqhelekileyo ziboniswe kuMfanekiso 2, ohlalutyiweyo kwiCandelo 3.