发明名称 |
METHOD AND DEVICE FOR SWITCHING OPERATION MODE OF A FIVE-LEVEL INVERTER |
摘要 |
A method and device for switching an operation mode of a five-level inverter are provided. The method includes: determining a first three-level operation mode as a three-level operation mode to be switched to from a five-level operation mode in a case that a PV input voltage is higher than a bridge line-line voltage command value; switching, after the operation mode is switched to the first three-level operation mode, the operation mode from the first three-level operation mode to a second three-level operation mode, in a case that a junction temperature of a switching device operating in the first three-level operation mode exceeds a first preset value; and switching the operation mode from the second three-level operation mode to the first three-level operation mode in a case that the junction temperature of a switching device operating in the second three-level operation mode exceeds a second preset value. |
申请公布号 |
US2016181946(A1) |
申请公布日期 |
2016.06.23 |
申请号 |
US201514938228 |
申请日期 |
2015.11.11 |
申请人 |
Sungrow Power Supply Co., Ltd. |
发明人 |
DING Jie;ZOU Haiyan;TAO Lei;XU Taotao;ZHANG Cheng |
分类号 |
H02M7/483;H02M1/32 |
主分类号 |
H02M7/483 |
代理机构 |
|
代理人 |
|
主权项 |
1. A method for switching an operation mode of a five-level inverter, comprising:
determining a first three-level operation mode as a three-level operation mode of the five-level inverter to be switched to from a five-level operation mode in a case that a PV input voltage is higher than a bridge line-line voltage command value of the five-level inverter required when the five-level inverter is connected to a power grid, wherein the five-level inverter has two three-level operation modes; switching, after the operation mode of the five-level inverter is switched to the first three-level operation mode, the operation mode of the five-level inverter from the first three-level operation mode to a second three-level operation mode in a case that a junction temperature of a switching device operating in the first three-level operation mode exceeds a first preset value; and switching the operation mode of the five-level inverter from the second three-level operation mode to the first three-level operation mode in a case that the junction temperature of a switching device operating in the second three-level operation mode exceeds a second preset value. |
地址 |
Hefei CN |