公开(公告)号：US20230291208A1

公开(公告)日：2023-09-14

申请号：US18316387

申请日：2023-05-12

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Xinyu YU ,  Kai XIN ,  Jianqiang WANG ,  Song WAN

IPC: H02J3/46 ,  H02S50/10 ,  H02J3/00

CPC classification number: H02J3/46 ,  H02S50/10 ,  H02J3/0012 ,  H02J2300/26

Abstract: The photovoltaic power generation system includes a controller and M groups of DC-DC circuits. Each group of DC-DC circuits include N DC-DC circuits, where M is a positive integer, and N is an integer greater than 1. An input end of each DC-DC circuit is connected to at least one photovoltaic unit, and each photovoltaic unit includes at least one photovoltaic module. The controller controls the N DC-DC circuits in each group of DC-DC circuits to sequentially start online IV curve scanning and controls a time interval at which two adjacent DC-DC circuits start online IV curve scanning to be less than duration of online IV curve scanning performed by one DC-DC circuit. The photovoltaic power generation system can reduce a fluctuation of a power output during online IV curve scanning, reduce duration of online IV curve scanning performed by the photovoltaic power generation system.

公开(公告)号：US20220209710A1

公开(公告)日：2022-06-30

申请号：US17696555

申请日：2022-03-16

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Song WAN ,  Wuben SUN ,  Yuandong MENG ,  Zhigang WANG ,  Yanzhong ZHANG

IPC: H02S20/32 ,  H02S40/30

Abstract: A photovoltaic system includes a plurality of photovoltaic racks, a plurality of photovoltaic strings connected to each photovoltaic rack in the plurality of photovoltaic racks, a detector, and a controller. Each photovoltaic rack is configured to rotate by an angle through the controller. Each photovoltaic string is configured to convert light energy into electric energy. The detector is separately connected to the controller and the plurality of photovoltaic strings, and is configured to detect blocking parameters of the plurality of photovoltaic strings. The controller is connected to the plurality of photovoltaic racks, and is configured to: control, based on illumination angles, the plurality of photovoltaic racks to rotate by an angle, obtain a photovoltaic rack blocking relationship based on the blocking parameters of the plurality of photovoltaic strings, and adjust a rotation angle of a first photovoltaic rack or a second photovoltaic rack based on the photovoltaic rack blocking relationship.

公开(公告)号：US20220352849A1

公开(公告)日：2022-11-03

申请号：US17868105

申请日：2022-07-19

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Jianqiang WANG ,  Yuandong MENG ,  Song WAN ,  Yanzhong ZHANG

IPC: H02S50/15 ,  H02J3/00 ,  G06T7/00

Abstract: A photovoltaic string location update method and apparatus includes: obtaining, based on a physical map, a physical location of a first photovoltaic string corresponding to a first logical location in the physical map, the physical map indicating a correspondence between a logical location of a photovoltaic string and a physical location of the photovoltaic string, and the photovoltaic string includes the first photovoltaic string; and when the physical location of the first photovoltaic string in the physical map is different from a first actual physical location of the first photovoltaic string, updating the physical location of the photovoltaic string in the physical map to the first actual physical location, to obtain an updated physical map. The first actual physical location of the photovoltaic string is inconsistent with the physical location in the physical map, to prepare for subsequent operation and maintenance accurately performed on the photovoltaic string.

公开(公告)号：US20220337186A1

公开(公告)日：2022-10-20

申请号：US17711243

申请日：2022-04-01

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Wuben SUN ,  Song WAN ,  Kai YIN ,  Yanzhong ZHANG ,  Huiping LIU ,  Yue ZHENG

IPC: H02S20/32 ,  H02S50/10 ,  G06N3/08 ,  G05D3/20 ,  G06N3/04

Abstract: A photovoltaic system includes the photovoltaic module, an electric energy conversion apparatus, an inverter, and a computing device. The computing device determines whether output power of the photovoltaic module meets a first preset condition, where the first preset condition is that the output power is greater than or equal to a first preset output power; when the first preset condition is met, the computing device determines to set the photovoltaic module to a default configuration direction, where the default configuration direction is a photovoltaic module orientation in which sunlight is irradiated onto the photovoltaic module with a minimum incident angle; and when the first preset condition is not met, the computing device determines to set the photovoltaic module to a target orientation, where the target orientation is different from the default configuration direction.

公开(公告)号：US20220166377A1

公开(公告)日：2022-05-26

申请号：US17669724

申请日：2022-02-11

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Jianqiang WANG ,  Song WAN ,  Yanzhong ZHANG ,  Yongbing GAO

IPC: H02S50/15 ,  H04N5/33 ,  H02S40/32

Abstract: This application discloses a method and an apparatus for detecting a solar cell of a photovoltaic plant. The method includes: obtaining a first infrared image and a second infrared image, where the first infrared image includes infrared image information corresponding to an ambient infrared signal reflected by a to-be-detected solar cell operating in a short-circuit state, the second infrared image includes infrared image information corresponding to an infrared signal emitted by the to-be-detected solar cell operating in a first state and infrared image information corresponding to an ambient infrared signal reflected by the to-be-detected solar cell, and the first state is another state other than the short-circuit state; and detecting, based on the first infrared image and the second infrared image, whether the to-be-detected solar cell has a defect.