公开(公告)号：US09673731B2

公开(公告)日：2017-06-06

申请号：US14920217

申请日：2015-10-22

Applicant: Sungrow Power Supply Co., Ltd.

Inventor： Lin Cheng ,  Nianan Pan ,  Zhicheng Wang ,  Lei Tao

IPC: H02M1/36 ,  H02M7/493 ,  H02M7/44 ,  H02H7/122

CPC classification number: H02M7/44 ,  H02H7/1222 ,  H02H7/1227 ,  H02M7/493

Abstract: Provided are a parallel inverter system, and a shutdown control method and a shutdown control device for the parallel inverter system. A shutdown instruction is determined and responded according to a level of the shutdown instruction. The shutdown instruction is determined to be an emergency shutdown instruction under certain emergency shutdown conditions, and a driving signal for the power switch devices of the inverter apparatus is needed to be instantly locked out. The shutdown instruction is determined to be a normal shutdown instruction under non-emergency shutdown conditions, a switch-off signal is transmitted to alternating-current switches connected to the inverter apparatus to be shut down, states of the alternating-current switches connected to the inverter apparatus to be shut down are detected, the driving signal for the power switch devices of the inverter apparatus to be shut down is instantly locked out in a case that the alternating-current switches are switched off.

公开(公告)号：US20240339921A1

公开(公告)日：2024-10-10

申请号：US18579630

申请日：2022-04-24

Applicant: Sungrow Power Supply Co., Ltd.

Inventor： Shuai Sun ,  Anran He ,  Peng Chen ,  Zhicheng Wang ,  Xuebing Chen

IPC: H02M1/00 ,  H02S40/32

CPC classification number: H02M1/0074 ,  H02M1/0077 ,  H02S40/32

Abstract: A photovoltaic system and a control method. The photovoltaic system includes a master DC/DC converter; a slave DC/DC converter; a master DC/AC converter; and a slave DC/AC converter. The master DC/AC converter is configured to send a current instruction value and an input voltage of the master DC/AC converter to the slave DC/AC converter; and the slave DC/AC converter is configured to control an output current, based on an input voltage of the slave DC/AC converter, the current instruction value, and the input voltage of the master DC/AC converter, so that a current through the N wire is less than a preset current.

公开(公告)号：US11387643B2

公开(公告)日：2022-07-12

申请号：US16959982

申请日：2019-12-31

Applicant: SUNGROW POWER SUPPLY CO., LTD.

Inventor： Cheng Liang ,  Nianan Pan ,  Zhicheng Wang ,  Lin Cheng ,  Longlin Sun ,  Jigui Feng

IPC: H02H7/122

Abstract: A method, a device, and a system for protecting parallel-connected topology units are provided. A target signal transmitted via the signal synchronization line is obtained, and the target signal is sent to other controllers based on a type of the target signal. If the target signal is a carrier synchronization signal, the current power module is controlled to perform carrier synchronization and to be in a working mode. If the target signal is a power module fault signal, the current power module is controlled to be in a shutdown mode. The signal synchronization lines between the parallel-connected topology units are shared in a time-sharing manner, where the carrier synchronization signal is transmitted if the power module works normally, and the power module fault signal is transmitted if the power module is faulty. The topology units monitor the transmitted target signal in real time for fast synchronous protection.