INVERTER APPARATUS AND SOLAR PHOTOVOLTAIC GRID-CONNECTED SYSTEM USING THE SAME

摘要

#$%^&*AU2012266985B220150507.pdf#####(12) t$1tI*W JPJA** IWi (10) (43)E~# WO 2012/167691 A1 2012 * 12 P] 13 H (13.12.2012) WIPO I PCT (51) 04)* I3;*: GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, H02M 7/5387 (2007.01) KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, (21) MW$i- : PCT/CN2012/075848 NA, NG, NI, NO, NZ, OM, PE, PG, PH, PL, PT, QA, RO, (22) 049F$-Wi: 2012 5 A 22 H (22.05.2012) RS, RU, RW, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, (25) $jfc: ZA, ZM, ZWO (26) 4 C: ~ (84) 4Ht5( tTh- $fTV{{IZ{N t): ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, 201110381814.0 2011 % 1 I9 25 H (25.11.2011) CN RW, SD, SL, SZ, TZ, UG, ZM, ZW), rk _ (AM, AZ, BY, KG, KZ, RU, TJ, TM), rtII (AL, AT, BE, BG, CH, (71) i*A (X0Z# N1 )niht lt[): |t4$|N CY, CZ, DE, DK, EE, ES, Fl, FR, GB, GR, HR, HU, IE, 4 q (HUAWEI TECHNOLOGIES CO., LTD.) IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, [CN/CN]; r @ $@~)[vx RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, )i , Guangdong 518129 (CN)o GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG)O (72) IVA; A (75) t0 A / $ A ( Jt )Z [-4): 4:, (LI, Quan) - Tli N VT fA @( #9 21 *(3)), [CN/CN]; A ff[$ Iii E65j20 _ Vg g g T)]p gg g*d5, A z ) , Guangdong 518129 (CN)0 o &Fli 41 I ([ Ml[148.2(h))o (81) f0 ZKt Y ( h IH A, 9* $_"T Tflt n'j 214 * N2)(ajWFQ-n~f4 t)) AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, Fl, GB, GD, (54) Title: INVERTER DEVICE AND SOLAR GRID-CONNECTED PHOTOVOLTAIC SYSTEM USING SAME r (5 4) i]US JWR MtE nu ; Hxt"'H L 23 21 r4-L------- - - -A I V2oSE T22 T21 2212 II TVA Ii D24 22 BOOSTER CIRCUIT2Ii. (57) Abstract: An inverter device and a grid-connected solar photovoltaic system. The inverter device comprises a booster circuit (22) and a bridge inverter (21). The bridge inverter comprises a supplementary branch that comprises a first power switch tube (T2 1), and a first diode (D2 1), the source drains of the first diode (D21) and of the first power switch tube (T21) being forward seri ally connected. The electric current input of the supplementary branch electrically connects to voltage output of the booster circuit. The electric current output of the supplementary branch electrically connects to an alternating output (VA). When the voltage of the O direct current power source (Vi) is low, the booster circuit and the direct current power source can together provide direct current to the inverter circuit, so that the inverter operates in three levels, thereby enhancing the efficiency of the system. (57) Ul: [)lfd]WVO 2012/167691 A l II1111111 1V II IVII DIDiD II DDIII II1111111 D~ I -$ t H IX ~ #~~ (22) HXV]t (21) , *XUJ ~~Th~~~5{+~(21 (T21)R' (D21) ,k~~ M--h' (D21)4hF~~ht if±4tT# ~flttL Th±LIh±YF~ (VA) t44Z0 iS Lh-Lt'ilFt± (vi) Mul ±ttPbl t