Huawei Technologies Co., Limited

Huawei Digital Power Technologies Co., Ltd.

Zhou Shu

Chuntao Zhang

Xiaofei Zhang

Lei Deng

Peng Shuai

Xuejuan Kong

Ran Li

This application discloses a non-current equalization UPS apparatus, a current distribution method, and a parallel UPS system. The current distribution method may be applied to any UPS apparatus in a parallel UPS system. A current proportion of a first current output by the any UPS apparatus in a total output current of the parallel UPS system is positively related to a capacity proportion of an available battery capacity of a battery string correspondingly connected to the any UPS apparatus in a total available battery capacity of the parallel UPS system. Therefore, a system backup time of the parallel UPS system can be prolonged, and resource utilization of a battery string with a large available battery capacity can be improved.

Non-current equalization UPS apparatus, current distribution method, and parallel UPS system

A power system, related to the field of electronic power. The power system includes a centralized controller and three power modules. Each phase of an alternating current power supply is connected to one power module, and an input end of each power module is connected to one phase of the alternating current power supply. Each power module includes a low voltage controller and at least two power units. Each power unit includes a unit controller. The centralized controller is connected to each low voltage controller by using a bus. The centralized controller sends a control signal to each unit controller by using each low voltage controller, to control the unit controller and/or a power conversion circuit. The power system can implement hot swap of the power module and improve on-site operation reliability.

Power system, data center, and charging device

A power supply system includes a plurality of parallelly-connected uninterruptible power supplies (UPSs), where each UPS collects a first current of the UPS within a collection period in a first duration. In a current equalization period in the first duration, a direct current to alternating current conversion module is controlled to output a first compensation current, where the first compensation current includes at least one of a first compensation reactive current component or a first quantity of first compensation harmonic components.

Power supply system, power supply method, control apparatus, and computer storage medium

A modular UPS system includes at least two power devices, a controlling device, and a serial bus. The power device is configured to receive control status information transmitted by the controlling device. The power device is configured to transmit a status signal data frame to the serial bus according to the control status information when determining that a current period is a first preset period, where the status signal data frame includes an identifier field, the identifier field includes a status signal data area, and the status signal data area is used to store a data value of a status signal. The serial bus is configured to receive status signal data frames transmitted by the at least two power devices, and transmit status signal data frames with a same value in status signal data areas to the controlling device in parallel.

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Dongguan, China

Zhou Shu