Systems and methods for measuring power consumption in a display assembly are provided. Images are displayed at an electronic display subassembly. A simulated electric meter is electrically interposed between a utility electric supply and at least the electronic display subassembly and measures power consumed by at least said electronic display subassembly. Cumulative power measurements may be recorded by the simulated electric meter for each image displayed at the electronic display subassembly.

An electrical panel or an electrical meter may provide improved functionality by interacting with a smart plug. A smart plug may provide a smart-plug power monitoring signal that includes information about power consumption of devices connected to the smart plug. The smart-plug power monitoring signal may be used in conjunction with power monitoring signals from the electrical mains of the building for providing information about the operation of devices in the building. For example, the power monitoring signals may be used to (i) determine the main of the house that provides power to the smart plug, (ii) identify devices receiving power from the smart plug, (iii) improve the accuracy of identifying device state changes, and (iv) train mathematical models for identifying devices and device state changes.

An electrical panel or an electrical meter may provide improved functionality by interacting with a smart plug. A smart plug may provide a smart-plug power monitoring signal that includes information about power consumption of devices connected to the smart plug. The smart-plug power monitoring signal may be used in conjunction with power monitoring signals from the electrical mains of the building for providing information about the operation of devices in the building. For example, the power monitoring signals may be used to (i) determine the main of the house that provides power to the smart plug, (ii) identify devices receiving power from the smart plug, (iii) improve the accuracy of identifying device state changes, and (iv) train mathematical models for identifying devices and device state changes.

An electrical panel or an electrical meter may provide improved functionality by interacting with a smart plug. A smart plug may provide a smart-plug power monitoring signal that includes information about power consumption of devices connected to the smart plug. The smart-plug power monitoring signal may be used in conjunction with power monitoring signals from the electrical mains of the building for providing information about the operation of devices in the building. For example, the power monitoring signals may be used to (i) determine the main of the house that provides power to the smart plug, (ii) identify devices receiving power from the smart plug, (iii) improve the accuracy of identifying device state changes, and (iv) train mathematical models for identifying devices and device state changes.

An electrical panel or an electrical meter may provide improved functionality by interacting with a smart plug. A smart plug may provide a smart-plug power monitoring signal that includes information about power consumption of devices connected to the smart plug. The smart-plug power monitoring signal may be used in conjunction with power monitoring signals from the electrical mains of the building for providing information about the operation of devices in the building. For example, the power monitoring signals may be used to (i) determine the main of the house that provides power to the smart plug, (ii) identify devices receiving power from the smart plug, (iii) improve the accuracy of identifying device state changes, and (iv) train mathematical models for identifying devices and device state changes.

Techniques for generating simulated waveforms for an electric meter include operating a meter in simulation mode without an external load device connected to the meter. Simulated waveforms are generated for a number of channels based on waveform component values. The waveforms are generated at a rate that corresponds to a sample rate of an analog to digital converter (ADC) of the meter. In simulation mode, the waveforms are provided to a meter firmware interface, instead of the waveform data obtained from the ADC.

Embodiments generally relate to a method for allowing power supplied through a cable to be determined. The method comprises receiving magnetic field data, the magnetic field data relating to a magnetic field generated by the cable, receiving reference data, the reference data relating to a current supplied to one or more monitored loads powered through the cable; based on the received magnetic field data and reference data, determining at least one parameter of a function that relates the magnetic field generated by the cable to the power supplied through a cable; and making available the at least one parameter, so that a power supplied by the cable can be determined based on the at least one parameter and a magnetic field value. The one or more monitored loads are a subset of all the loads powered through the cable.

Provided is a sensor in which a current sensor that detects a current of a power line as a change in a magnetic field and a voltage sensor that detects a voltage of the power line using capacitive coupling are integrally formed. The transmission of signals related to substantially the same sections is omitted in order to effectively compress an output signal from the sensor and an output signal from the voltage sensor. When the amplitude and phase of a fundamental wave which are estimated from the output signal from the sensor and the amplitude and phase of harmonics are encoded, the amplitude and phase of the harmonics are relativized with a value for the fundamental wave.

Provided is a sensor in which a current sensor that detects a current of a power line as a change in a magnetic field and a voltage sensor that detects a voltage of the power line using capacitive coupling are integrally formed. The transmission of signals related to substantially the same sections is omitted in order to effectively compress an output signal from the sensor and an output signal from the voltage sensor. When the amplitude and phase of a fundamental wave which are estimated from the output signal from the sensor and the amplitude and phase of harmonics are encoded, the amplitude and phase of the harmonics are relativized with a value for the fundamental wave.

Sampling timings at a plurality of measurement points at which waveform data of a power line is sampled are easily synchronized to each other. A measurement device includes: a sampling unit configured to sample a waveform of at least one of a voltage and a current at a measurement point of a power line at a predetermined sampling timing; a processing unit configured to execute processing of the waveform sampled by the sampling unit; a time information acquisition unit configured to acquire time information from a time information provision device that is communicatively connected through a network; and an adjustment unit configured to adjust a processing timing of the processing on the basis of the time information acquired by the time information acquisition unit.