This disclosure describes a miniaturized energy-monitoring device that can be powered through an Internet port, which also facilitates the programming the device and transmitting energy consumption data to a remote device for recording and analyzing.

This disclosure describes a miniaturized energy-monitoring device that can be powered through an Internet port, which also facilitates the programming the device and transmitting energy consumption data to a remote device for recording and analyzing.

Energy usage of a plurality of appliances is measured using a single meter. A pattern of energy usage with respect to the plurality of appliances is determined dependent upon the measured energy usage, appliance details of the plurality of appliances, and usage hours of the plurality of appliances. The pattern is provided to a user of the appliances.

Building automation systems, energy meters, and associated methods. A method includes receiving a plurality of voltage inputs and a plurality of current inputs from a multiphase power source. The method includes selecting a first voltage input from the plurality of voltage inputs. The method includes performing a signed power factor computation between respective pairs of the first voltage input and each of the plurality of current inputs. The method includes identifying a pair with a greatest positive power factor value. The method includes designating the identified pair with the greatest positive power factor value as an associated phase pair.

A wireless mesh network includes a group of nodes configured to predict cloud movements based on voltage time series data. A node residing in the wireless mesh network records voltage fluctuations at a site where solar power is generated. The voltage fluctuations occur when an advancing cloud reduces solar irradiance at the site, thereby reducing solar power generation. The node correlates these voltage fluctuations with other voltage fluctuations recorded by other nodes at other sites where solar power is generated. The node computes a time offset between these voltage fluctuations that corresponds to the time needed for the cloud to advance between the different sites. Based on this time offset and the locations of the various nodes, the node estimates a wind vector. The wind vector can be used to perform near-term solar forecasting by predicting when the cloud will advance to other sites and reduce solar power generation.

A test system for measuring electrical current consumption of a device under test (DUT) includes a capacitor with power and ground terminals; a voltage regulator with input and output terminals; first and second switching elements; and a controller. The voltage regulator generates a DUT operating voltage based on its input voltage. The first switching element is arranged between a direct current (DC) voltage source and the regulator input, and the second switching element is arranged between the DC voltage source and the capacitor. The controller operates the switching elements to charge the capacitor, and to configure the test system for measuring operating current of the DUT using the capacitor as the power source.

A utility meter device (1002) including a communications receiver (110) for receiving file fragments for the device, a processing means (150), eg microprocessor, microcontroller, and programmable non-volatile memory means (120), eg flash, EEPROM, for building and storing application and date files from the fragments, and executing a meter application of the device by processing at least one application file and associated data identified by configuration instructions in at least one of the fragments to provide data for reconfiguring a meter through a control interface (1016).

An electrical energy transferring device coupled to an electrical energy receiving device is provided. The electrical energy transferring device includes an electrical source measuring unit and a power indicating unit. The electrical source measuring unit detects a power consumption and/or a charging status of the electrical energy receiving device. The power indicating unit is coupled to the electrical source measuring unit for showing the power consumption and/or the charging status of the electrical energy receiving device by a color signal and/or an audio signal.

An electrical energy transferring device coupled to an electrical energy receiving device is provided. The electrical energy transferring device includes an electrical source measuring unit and a power indicating unit. The electrical source measuring unit detects a power consumption and/or a charging status of the electrical energy receiving device. The power indicating unit is coupled to the electrical source measuring unit for showing the power consumption and/or the charging status of the electrical energy receiving device by a color signal and/or an audio signal.

To determine a power consumption in a group of individual electric power distribution branches (3), a method includes the steps of: a) measuring the current (I) flowing in a main upstream line (2) and the voltage (U) of the main upstream line; b) measuring the voltage (U.sub.i) of at least one branch, downstream of a circuit breaker (7) equipping each branch (3); c) determining the current (I.sub.i) flowing through the branch based on the difference (ΔU.sub.i) between the upstream-downstream voltages; d) calculating the individual power consumption (P.sub.i′) of the branch from the current and the voltage of the branch; e) calculating the general power (P) consumed by the group of branches from the current and the voltage of the main upstream line; and f) correcting (F6) the individual power consumption (P.sub.i′) so that an instantaneous electric power consumption variation observed at the level of the branch (3) is equal to an instantaneous electric power consumption variation simultaneously observed at the level of the main upstream line (2).