公开(公告)号：US20210050816A1

公开(公告)日：2021-02-18

申请号：US17088023

申请日：2020-11-03

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xun MA ,  Guilei GU ,  Wei SHUI

IPC: H02S50/10 ,  H02S40/32

Abstract: Embodiments of this application disclose a fault point position determining method and apparatus and a photovoltaic system, to correctly and efficiently determine a fault point position when a disconnection fault occurs in a photovoltaic system. The method is applied to a photovoltaic system, the photovoltaic system includes at least one inverter and at least one photovoltaic unit, each photovoltaic unit includes at least one photovoltaic module and one photovoltaic module controller, and the method includes: sending, by an inverter, a first test signal to the at least one photovoltaic unit; obtaining, by the inverter, first test signal characteristic information fed back by the at least one photovoltaic unit; and performing, by the inverter, absolute value or relative value sorting on the at least one piece of first test signal characteristic information, and determining a fault point in the photovoltaic system based on a sorting result.

公开(公告)号：US20210408824A1

公开(公告)日：2021-12-30

申请号：US17472288

申请日：2021-09-10

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xun MA ,  Yu SUN ,  Wei SHUI

IPC: H02J13/00 ,  H02J3/38 ,  G05B15/02

Abstract: This application provides a method and apparatus for obtaining location information of a controller. The method includes: obtaining, by an inverter, signal feature information of each photovoltaic unit in a high-voltage direct current string, where the signal feature information of a photovoltaic unit includes a communication identifier of the photovoltaic unit and a signal feature of another photovoltaic unit, and the photovoltaic unit includes one controller and at least one photovoltaic module; determining an installation sequence of the photovoltaic units based on signal feature information of the photovoltaic units; and determining relative installation location information of each photovoltaic unit based on relative installation location information of a target photovoltaic unit in the high-voltage direct current string and the installation sequence of the photovoltaic units, where the target photovoltaic unit is at least one photovoltaic unit in the high-voltage direct current string.

公开(公告)号：US20180198406A1

公开(公告)日：2018-07-12

申请号：US15916296

申请日：2018-03-09

Applicant: Huawei Technologies Co., Ltd.

Inventor： Fayin CAO ,  Wei SHUI ,  Xun MA

IPC: H02S50/10 ,  H02S40/32

CPC classification number: H02S50/10 ,  H02S40/32

Abstract: A photovoltaic module monitoring apparatus includes a driver module, configured to: receive a status request differential signal sent by an inverter of the power system; obtain, according to the status request differential signal, status information of a photovoltaic PV module corresponding to the photovoltaic module monitoring apparatus; modulate the status information of the photovoltaic PV module to generate a status response differential signal; and send the status response differential signal to the inverter; and a bypass module parallelly connected to the driver module, configured to transmit the status request differential signal and the status response differential signal, where an impedance of the bypass module is less than an impedance of the photovoltaic PV module.