Tencent Technology (shenzhen) Company Limited

Guangdong East Power Co., Ltd.

East Group Go., Ltd.

Huawei Technologies Co., Limited

Haibo Xu

Yu Cai

Xi Zhang

Wei Yu

Xiao Xiao

Yuxi Liu

Jiayi Yan

Shengfa Zhang

Ming Li

Peng Li

Yiru Kuang

Jing Liu

Tao Zhang

Chuting Yao

Jian Wang

Zhijun Zhang

Zhaoyang Tang

Li Li

Yong Jun Chen

Hongyu Li

Shichao Liu

Ruikun Mai

Jiarong Wang

Simo He

Ling Fu

Mingli Dong

Changhu Peng

Zhipeng Pan

Jianhui Su

Nathan Edward Tenny

A microgrid system and method of controlling same, the microgrid system comprising a storage battery (), an energy storage converter (), a monitoring circuit and a controllable switch (). When the microgrid system is in grid-connected mode, the energy storage converter outputs steady power under the control of an inner current loop unit (); in grid-connected mode, an outer voltage loop unit () does not participate in control, but remains in an operating state, and on the basis of four outer voltage loop unit input signals, estimates in advance a specified current loop signal (U) for handover from grid-connected mode to island mode. When the microgrid system hands over from grid-connected mode to island mode, the outer voltage loop unit goes into operation, and the inner current loop unit controls a steady output voltage and frequency from the energy storage converter according to the pre-estimated specified current loop signal output by the outer voltage loop unit. The outer voltage loop unit controls the outputted specified current loop signal to be identical before and after mode handover, and can realize seamless handover between grid-connected and island modes for the microgrid system.

Microgrid system and method of controlling same

A method for displaying a terminal charging status and a terminal. The method includes: displaying a charging status region on a terminal screen when it is detected that a terminal battery is being charged, with a halo enlarging or shrinking with a preset frequency existing at the edge of the charging status region; according to a ratio of the current electric quantity of the terminal battery to the electric quantity of the terminal battery being fully charged, displaying a filled region having the same ratio in the charging status region. The method for displaying a terminal charging status and the terminal can realize visually displaying a charging status and a charging progress of the terminal.

Method for displaying terminal charging status and terminal

Described is a method and system for displaying an unread message. The method for displaying an unread message includes: pulling an unread message in a lock screen state; and displaying a corresponding unread message application icon on a first active hotspot on a lock screen when an unread message exists, and otherwise, hiding the unread message application icon. The method for previewing an unread message includes: receiving information for activating an unread message application icon in a lock screen state, and displaying a detail entry containing a predetermined number of unread messages on a second active hotspot; dragging the unread message application icon to a third active hotspot to enter into a corresponding application main window, or dragging the unread message application icon to the detail entry to enter into a message window corresponding to the detail entry.

Method and system for displaying unread message

The present invention relates to a method for measuring the frequency of phasor of a power system, belonging to the technical field of power systems and automation thereof. A grid-connected photovoltaic generation system is provided with a control module, a data buffer module, an inverter, a sampling module and an analog-to-digital conversion module; a voltage transformer is connected to the grid side of the grid-connected photovoltaic generation system; the voltage transformer is electrically connected to the analog-to-digital conversion module; the analog-to-digital conversion module converts an analog signal sent by the voltage transformer into a digital signal; the sampling module samples the digital signal and transmits the digital signal into the data buffer module; the data buffer module is provided with a plurality of data windows; and the control module receives signals from the data windows.

Method for measuring frequency of phasor of power system

A non-isolated symmetric self-coupling 18-pulse rectifier power supply system comprises a phase-shifting autotransformer, three circuits of output devices, a time sequence controller and a power output end. The phase-shifting autotransformer is provided with three groups of output ends and one group of input ends, and the output device in each circuit comprises a zero-sequence suppression reversing inductor, a three-phase uncontrolled rectifier bridge and a bidirectional switch BUCK converter, which are connected to each other in turn. The time sequence controller is provided with three groups of control ends which are respectively connected to the control end of the bidirectional switch BUCK converter in each circuit. The output end of the bidirectional switch buck converter in each circuit is connected to the power output end.

Non-isolated symmetric self-coupling 18-pulse rectifier power supply system

A symmetric-type UPS power system based on a nine-phase phase-shifting autotransformer includes a three-phase AC power input terminal, a three-phase AC power output terminal, a nine-phase phase-shift autotransformer, a synchronized control device for controlling output of a three-phase inverter, a power-frequency isolation transformer and three circuits of output devices; wherein the three-phase AC input terminal of the nine-phase phase-shifting autotransformer is connected to the three-phase AC power input terminal, each circuit of the output devices includes a zero-sequence suppression commutating inductor, a three-phase six-pulse rectifier, a three-phase inverter and a filter inductor which are connected with each other in sequence, each circuit of the zero-sequence suppression commutating inductor is connected to the three-phase AC output terminal of the phase-shifting autotransformer, each circuit of the filter inductor is connected to the input terminal of the power-frequency isolation transformer.

Symmetric-type UPS power system based on a nine-phase phase-shifting autotransformer

For unlocking touch control of a touch control terminal, it is detected if any unlock object is selected, then the selected unlock object is tracked to see if the selected unlock object has slid to any of a plurality of unlocking positions outside the corresponding locking zone. If positive, the touch control for a function corresponding to the selected unlock object is unlocked.

Touch control terminal and method and device for unlocking touch control

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Guangdong, China

Haibo Xu