Huawei Digital Power Technologies Co., Ltd.

Huawei Technologies Co., Limited

Wei Shui

Yan Zhang

Yang Liu

Yu Sun

Chen Xiao Wang

Yanzhong Zhang

Yongbing Gao

Chen Wang

Li Zhou

Guilei Gu

Tiansan Lin

Shuang Peng

Xun Ma

Yuan Cheng

Fayin Cao

Heming Liu

An interface circuit, a string, and a system that are applied to power line communication, to lower device specifications, includes: an inverter, an optimizer group, a capacitor, a magnetic ring, power lines, and a signal line. An optimizer in the optimizer group is configured to adjust a size of a direct current output by a photovoltaic module connected to the optimizer. Two ends of the signal line passing through the magnetic ring are connected to the inverter. Two ends of a power line passing through the magnetic ring are respectively connected to the capacitor and the optimizer group. By using the foregoing interface circuit, a high voltage of a direct current output by the optimizer group is prevented from being introduced into the inverter, thereby reducing a specification requirement of a device such as a capacitor.

Interface circuit, string, and system applied to power line communication

A wireless power supply apparatus includes a controller, a beamforming module, and an antenna array. When direction finding information is obtained, the controller determines an electromagnetic wave transmission direction, and transmits information about the transmission direction to the beamforming module. The beamforming module aggregates energy of electromagnetic waves corresponding to a plurality of radio frequency signals to the transmission direction. The antenna array receives the direction finding information, and transmits the electromagnetic waves.

Wireless power supply apparatus and wireless power receiving terminal

An isolated communications apparatus applied to a transformer. The transformer includes N first rectifier units and a second rectifier unit, and the isolated communications apparatus includes N first control units, a second control unit, and a signal convergence unit. The first control units are connected to the first rectifier units in a one-to-one correspondence. Each first control unit is connected to the signal convergence unit, and the signal convergence unit and the second control unit are connected through an optical fiber. The signal convergence unit is configured to: receive first data packets from the N first control units, send the first data packets to the second control unit, receive at least one second data packet from the second control unit, determine a first control unit corresponding to each second data packet, and send each second data packet to a corresponding first control unit.

Isolated communications apparatus and power supply system

A power line communication apparatus includes a first power line communication device disposed at a signal transmit end, a second power line communication device disposed at a signal receive end, a power line, a first magnetic ring disposed at the signal transmit end, and a second magnetic ring disposed at the signal receive end. The second power line communication device receives the modulated signal from the power line. The power line includes a wire for transmitting electric energy and a shield layer that wraps the wire for electromagnetic shielding. The wire and the shield layer separately extend from the signal transmit end to the signal receive end. The first magnetic ring and the second magnetic ring are separately coupled to the shield layer, to suppress inductance attenuation of the magnetic ring and improve reliability of the transmitted modulated signal.

Power line communication apparatus and power generating system

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.

Fault point position determining method and apparatus and photovoltaic system

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.

Method and apparatus for obtaining location information of controller

An inverter in a power generation system converts a direct current that is input from a direct-current-side device into an alternating current for power supply. The inverter includes a control apparatus and a communications apparatus. The control apparatus controls the inverter to convert the direct current that is input from the direct-current-side device into an alternating current for power supply. The communications apparatus is coupled to the control apparatus, and sends a networking information request signal used to request networking information to the direct-current-side device in the power generation system through a direct-current power line, where a frequency of the networking information request signal is within a first frequency band. The communications apparatus also receives the networking information from the direct-current-side device; and sends a control signal to the direct-current-side device, where a frequency of the control signal is within a second frequency band.

Power generation system and communications apparatus used in power generation system

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.

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Dongguan, China

Wei Shui