公开(公告)号：EP3396840B1

公开(公告)日：2020-03-04

申请号：EP18162355.4

申请日：2018-03-16

申请人： Sungrow Power Supply Co., Ltd.

发明人： Zhuang, Jiacai ,  Cui, Yuqing ,  Zhao, Deyong ,  Luo, Xiaohui ,  Zhang, Chaoxuan ,  Xu, Jun ,  Gu, Yilei ,  Wang, Xinyu

IPC分类号： H02M7/487 ,  H02M1/38 ,  H02M1/08

公开(公告)号：EP3396840A1

公开(公告)日：2018-10-31

申请号：EP18162355.4

申请日：2018-03-16

申请人： Sungrow Power Supply Co., Ltd.

发明人： Zhuang, Jiacai ,  Cui, Yuqing ,  Zhao, Deyong ,  Luo, Xiaohui ,  Zhang, Chaoxuan ,  Xu, Jun ,  Gu, Yilei ,  Wang, Xinyu

IPC分类号： H02M7/487 ,  H02M1/38 ,  H02M1/08

摘要： An ANPC inverter, a zero-crossing switching method and a zero-crossing switching apparatus of the ANPC inverter are provided. The method includes: controlling switch states of switch devices in a bridge leg to change according to a preset logic when zero-crossing switching occurs in an output voltage instruction of the bridge leg, so as to prevent overvoltage in the switch device in the bridge leg. The preset logic includes switching among a sequence of switch state combinations. Switch state combinations of the switch devices before and after the zero-crossing switching occurs are defined as the first and second switch state combinations of the sequence. The second to the penultimate switch state combinations are all safe switch state combinations selected in advance, in each of which a maximum voltage borne by the switch devices in the bridge leg is clamped to a safe limit value.

公开(公告)号：EP3361591A1

公开(公告)日：2018-08-15

申请号：EP18154634.2

申请日：2018-02-01

申请人： Sungrow Power Supply Co., Ltd.

发明人： Gu, Yilei ,  Gu, Yu ,  Zhuang, Jiacai

IPC分类号： H02J1/10 ,  H02J3/38

CPC分类号： H02J3/385 ,  H02J1/102 ,  H02M3/156 ,  H02M3/1582 ,  H02S40/32 ,  H02S40/34 ,  Y02E10/58

摘要： A photovoltaic inverter system and an operation method thereof are provided. The photovoltaic inverter system includes photovoltaic modules, DC/DC converters, at least one direct current combiner device and a centralized inverter. An input signal or an output signal of each of the DC/DC converters is sampled by the DC/DC converter, and a loop process is performed by the DC/DC converter on the input signal or the output signal to maintain the input signal or the output signal at a preset value, so as to keep the output power of the photovoltaic module to be the maximum output power, thereby solving the problem of the series-parallel mismatch of a photovoltaic array due to being shaded or aging of a photovoltaic module. In addition, the photovoltaic inverter system can include only one centralized inverter. Therefore, the cost is reduced compared with photovoltaic inverter systems in the conventional technology.