| 发明名称 |
METHOD AND DEVICE FOR MODULATING A FIVE-LEVEL INVERTER, AND PHOTOVOLTAIC SYSTEM |
| 摘要 |
A method for modulating a five-level inverter, a device for modulating a five-level inverter, and a photovoltaic system are provided. The method includes: acquiring a voltage command value Vcmd of a phase bridge of the five-level inverter; controlling a first switching device and a fourth switching device to be switched on alternately in a case that Vcmd‰¥V1Pos+Vthrs1; controlling the first switching device and a third switching device to be switched on alternately in a case that V1Pos-Vthrs2‰¤Vcmd<V1Pos+Vthrs1; controlling the fourth switching device and the third switching device to be switched on alternately in a case that 0‰¤Vcmd<V1Pos-Vthrs2; controlling the third switching device and a fifth switching device to be switched on alternately in a case that -V1Neg+Vthrs3‰¤Vcmd<0; controlling the third switching device and a second switching device to be switched on alternately in a case that -V1Neg-Vthrs4‰¤Vcmd<-V1Neg+Vthrs3; and controlling the fifth switching device and the second switching device to be switched on alternately in a case that Vcmd<-V1Neg-Vthrs4. According to the method, the impact on the distortion of the phase bridge output voltage is reduced. |
| 申请公布号 |
EP3035510(A3) |
申请公布日期 |
2016.08.03 |
| 申请号 |
EP20150193963 |
申请日期 |
2015.11.10 |
| 申请人 |
SUNGROW POWER SUPPLY CO., LTD. |
发明人 |
DING, JIE;ZOU, HAIYAN;TAO, LEI;XU, TAOTAO;ZHANG, CHENG |
| 分类号 |
H02M1/00;H02M1/12;H02M3/00;H02M7/487;H02M7/5395 |
主分类号 |
H02M1/00 |
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