公开(公告)号：US20230336122A1

公开(公告)日：2023-10-19

申请号：US18134749

申请日：2023-04-14

Applicant: Sungrow Power Supply Co., Ltd.

Inventor： Yuanze Zhang ,  Tao Jiang ,  Zijian Da

IPC: H02S50/10

CPC classification number: H02S50/10

Abstract: A HiL testing platform for a photovoltaic power station and a PPC performance testing method are provided. The HiL testing platform includes: a PPC, an inverter controller, and a HiL real-time simulator. Each of the PPC, the inverter controller, and the HiL real-time simulator is arranged with an upper computer. The PPC is configured to communicate with the inverter controller according to a predetermined communication protocol. The HiL real-time simulator is connected to the PPC and the inverter controller through a digital input interface and/or an analog output interface, and is configured to simulate a testing device in the photovoltaic power station in a digital model form.

公开(公告)号：US11784493B2

公开(公告)日：2023-10-10

申请号：US17485033

申请日：2021-09-24

Applicant: Sungrow Power Supply Co., Ltd.

Inventor： Tao Jiang ,  Nianan Pan ,  Chao Liu ,  Wei Sun ,  Xianli Zhang

IPC: H02J3/38 ,  H02J3/48

CPC classification number: H02J3/381 ,  H02J3/48 ,  H02J2300/24 ,  H02J2300/28

Abstract: A method and a device for primary frequency modulation in new energy power generation are provided. An inverter performs a first power adjustment according to a p-f droop curve before receiving a power adjustment instruction sent by the power station controller, and performs a second power adjustment in response to the power adjustment instruction. Since the inverter performs the first power adjustment before responding to the power adjustment instruction sent by the power station controller, the response of the primary frequency modulation is speeded up, so that rapid control for the new energy generation power is achieved, thereby ensuring stable operation of a power grid for new energy power generation.

公开(公告)号：US20220158453A1

公开(公告)日：2022-05-19

申请号：US17485033

申请日：2021-09-24

Applicant: Sungrow Power Supply Co., Ltd.

Inventor： Tao Jiang ,  Nianan Pan ,  Chao Liu ,  Wei Sun ,  Xianli Zhang

IPC: H02J3/38 ,  H02J3/48

Abstract: A method and a device for primary frequency modulation in new energy power generation are provided. An inverter performs a first power adjustment according to a p-f droop curve before receiving a power adjustment instruction sent by the power station controller, and performs a second power adjustment in response to the power adjustment instruction. Since the inverter performs the first power adjustment before responding to the power adjustment instruction sent by the power station controller, the response of the primary frequency modulation is speeded up, so that rapid control for the new energy generation power is achieved, thereby ensuring stable operation of a power grid for new energy power generation.

公开(公告)号：US10320294B2

公开(公告)日：2019-06-11

申请号：US15474045

申请日：2017-03-30

Applicant: SUNGROW POWER SUPPLY CO., LTD.

Inventor： Tao Jiang ,  Peng Chen ,  Xiaofei Wang ,  Fei Li

IPC: H02M3/158 ,  H02M7/537 ,  H02M1/32

Abstract: A discharging method of a bus capacitor, a controller, a DC-DC converter and an inverter are provided. After a DC-DC converter or an inverter is powered off, in a case that a detected voltage across a bus capacitor of the DC-DC converter or the inverter is determined to meet a preset condition, a switch of the DC-DC converter or the inverter is controlled to be turned on or turned off to cause the bus capacitor, the switch, and a reactor of the DC-DC converter or the inverter to form a current loop, until the voltage does not meet the preset condition. Based on the method, discharging function is achieved for the bus capacitor after the DC-DC converter or the inverter is powered off, without the need for an additional discharging circuit, which solves problems caused by the additional discharging circuit required in the conventional technology.