A management system includes a first receiver receiving, at a predetermined time interval, a reference value of a reference power meter, a second receiver receiving, at an interval shorter than the time interval, a first measurement value of a first power meter closer to a power system than a merging point of a power line connected to a distributed power supply and a power line connected to a load device, a third receiver receiving, at an interval shorter than the time interval, a second measurement value of a second power meter for measuring power consumption of the load device, and a controller executing a first calibration process related to the first power meter based on a comparison between the reference value and the first measurement value and subsequently executing a second calibration process related to the second power meter based on the first measurement value and the second measurement value.

Various implementations power homes and businesses without needing to connect to electric utility company-provided power, i.e., they can operate off-grid. Generally the system includes solar panel racks (e.g., photovoltaic cells on sheets stabilized using ballasts, anchors, or mounting) that generate electrical power used to provide power to a building or that is stored on batteries. The system includes the solar panel racks and an enclosure to be installed at the premises and separate from the building. The enclosure includes the batteries and inverters that are electronically connected to the solar panel racks and batteries. The inverters are configured to convert direct current (DC) electricity from the solar power racks and batteries to alternating current (AC) electricity to provide power to the building via wires electrically connecting the inverters to the main panel of the building.

A DC/DC converter includes a semiconductor switch S1 and is configured to convert an input voltage by turning on and off the semiconductor switch S1. A semiconductor switch S2 is connected between a main power supply and input of the DC/DC converter. A semiconductor switch S3 is connected between a connection point between the semiconductor switch S2 and the input of the DC/DC converter and the backup power supply. A control unit turns on the semiconductor switch S2 and the semiconductor switch S3 in a normal state, and turns off the semiconductor switch S2 and turns on the semiconductor switch S3 when an abnormality occurs in the main power supply.

A mobile terminal includes a touch screen display, a camera, a power button and an activation button for turning on the touch screen display. The mobile terminal has a first function and a second function to perform in response to user input and provides user settings for configuring at least one of the first and second functions such that the at least one of the first and second functions is performed along with turning on the touch screen display when pressing of the activation button is detected while the touch screen display is turned off. The mobile terminal is configured to perform the first and second functions depending upon length of pressing of the activation button in addition to turning on the touch screen display.

Methods and apparatuses are provided for controlling power transmission in a power transmitter. Voltage information including a minimum voltage, a maximum voltage, and a first voltage, is received from each of a plurality of power receivers. Power is transmitted to the plurality of power receivers based on the voltage information. A respective report about a power reception condition is received from each of the plurality of power receivers while transmitting the power. Each respective report includes a measured voltage at a corresponding power receiver of the plurality of power receivers. A power receiver is selected from among the plurality of power receivers based on the received reports. An amount of the power is adjusted by reducing a difference between a first voltage of the selected power receiver and a measured voltage of the selected power receiver.

A disclosed wireless power transmitting apparatus comprises: a plate; a transmitting coil that transmits wireless power to a cooking device disposed on the plate; a driving circuit that applies a current to the transmitting coil; a communication module that communicates with the cooking device; and a control unit that controls the driving circuit such that the wireless power is periodically transmitted on the basis of a transmission period of the wireless power determined by discharge characteristics of the cooking device when the cooking device enters a standby mode.

A method for controlling an electrical consumer is provided. The electrical consumer is coupled to an electricity supply grid using a frequency converter. The electricity supply grid has a line voltage and is characterized by a nominal line voltage. The electricity supply grid is monitored for a grid fault in which the line voltage deviates from the nominal line voltage by at least a first differential voltage. When the grid fault occurs, the electrical consumer remains coupled to the electricity supply grid, and a power consumption of the electrical consumer is changed on the basis of the deviation of the line voltage from the nominal line voltage.

A chip with power-glitch detection is provided, which includes a power terminal receiving power, an inverter, and a back-up power storage device coupled to the power terminal. The inverter has an input terminal coupled to the power terminal. The back-up power storage device transforms the power to back-up power. The inverter is powered by the back-up power when a power glitch occurs on the power terminal, and the power glitch is reflected at an output terminal of the inverter.

A system, a device, a method, a communication protocol, and/or the like, for energy management in a fragment, heterogeneous, electrical grid. The grid may include multiple types of power generation systems, electrical energy storage systems, electrical loads, and efficiently managing these systems may require elements that will bridge the technology gap of these systems, as well as provide best-effort power generation and consumption in order to stabilize the grid. These techniques are especially important in differentiated electric energy networks, such as micro-grids, island grids, virtual power plants, and/or the like.

Methods and systems for managing energy consumption during a power-loss event provide a backup power unit that can notify electronic devices of a switch to backup power. The electronic devices can then automatically minimize power consumption upon receiving such notification. The notification can take the form of one or more signals indicative of a backup power operational state. The signals may be sent to the electronic devices over any suitable wired or wireless connection. Depending on the particular operational states, the electronic devices can take one or more predefined backup power handling actions, such as reducing device functionality, entering low-power mode, performing a controlled shutdown, and the like. The particular actions taken may depend on the type of devices, such that certain devices may have power consumption priority over other devices. The above arrangement provides an intelligent way to reduce overall energy consumption during a power-loss event.