Abstract: A method for operating an electricity metering system is provided. The metering system includes an electronic energy meter and a metering application host. The method includes: receiving, by the electronic energy meter, an analog signal associated with power delivered using alternating current (AC); converting, by the electronic energy meter, the analog signal to a digital signal; generating, by the electronic energy meter, processed data and a continuous stream of waveform data; receiving, by a continuous waveform data stream module of the metering application host, the continuous stream of waveform data; requesting, by a first metering application hosted by the metering application host, at least a first portion of the continuous stream of waveform data; and transferring, by the continuous waveform data stream module, the at least a first portion of the continuous stream of waveform data to the first metering application.

Abstract: A method for detecting electric meter installation issues includes: determining an initial orientation of an electric meter based on initial acceleration measurements from an accelerometer positioned in the electric meter. Subsequent acceleration measurements from the accelerometer may be continuously monitoring, and a subsequent orientation of the electric meter may be determined based on the subsequent acceleration measurements. A difference between the initial orientation and the subsequent orientation based on the initial acceleration measurements and the subsequent acceleration measurements may be determined and compared to a threshold value. Based on the difference exceeding the threshold value, a notification of a change in orientation of the electric meter may be generated to a head-end system.

Abstract: A multi-port meter system supports islanding operations at a premises. A multi-port meter includes at least a load port, a grid port, an auxiliary port, and at least two switches, a grid switch and an auxiliary switch. The grid port connects the multi-port meter to the grid and the grid switch allows the multi-port meter to control the meter's connection to the grid. The auxiliary port connects the multi-port meter to an inverter, which is connected to a distributed energy resource device, and the auxiliary switch allows the multi-port meter to control the inverter's connection to the load associated with the premises and the grid. The transition to islanding mode may be based on determinations made at the meter, the inverter, a remote device, or by a user.

Abstract: A method identifies a duration of power interruptions in an electrical monitoring system. The method includes receiving, with an external monitoring system, a load profile from an electric meter that includes at least one of an accumulated frequency measurement and an accumulated number of zero crossing events that the electric meter records in an AC power signal during a predetermined monitoring period, and identifying a total duration of at least one power interruption during the predetermined monitoring period based on at least one of a deviation of the accumulated frequency measurement in the load profile from a predetermined accumulated frequency value or a deviation of the accumulated number of zero crossing events in the load profile from a predetermined number of zero crossing events during the predetermined monitoring period.

Abstract: A method identifies a duration of power interruptions in an electrical monitoring system. The method includes receiving, with an external monitoring system, a load profile from an electric meter that includes at least one of an accumulated frequency measurement and an accumulated number of zero crossing events that the electric meter records in an AC power signal during a predetermined monitoring period, and identifying a total duration of at least one power interruption during the predetermined monitoring period based on at least one of a deviation of the accumulated frequency measurement in the load profile from a predetermined accumulated frequency value or a deviation of the accumulated number of zero crossing events in the load profile from a predetermined number of zero crossing events during the predetermined monitoring period.

Abstract: Certain aspects and features include a system and method for energy measurement in electric meter systems. In an example, an electric meter receives an Alternating Current (A/C) signal. The electric meter includes a current measurement device that is configured to obtain a current measurement of a current of the A/C signal. The current measurement includes a fundamental frequency component and a noise component. The electric meter receives a current measurement signal from the current measurement device and filters the noise component from the current measurement, thereby creating a filtered current measurement signal. When the filtered current measurement signal is greater than a starting current threshold, the electric meter calculates an energy consumption measurement.

Abstract: A method for detecting electric meter installation issues includes: determining an initial orientation of an electric meter based on initial acceleration measurements from an accelerometer positioned in the electric meter. Subsequent acceleration measurements from the accelerometer may be continuously monitoring, and a subsequent orientation of the electric meter may be determined based on the subsequent acceleration measurements. A difference between the initial orientation and the subsequent orientation based on the initial acceleration measurements and the subsequent acceleration measurements may be determined and compared to a threshold value. Based on the difference exceeding the threshold value, a notification of a change in orientation of the electric meter may be generated to a head-end system.

Abstract: Certain aspects and features include a system and method for energy measurement in electric meter systems. In an example, an electric meter receives an Alternating Current (A/C) signal. The electric meter includes a current measurement device that is configured to obtain a current measurement of a current of the A/C signal. The current measurement includes a fundamental frequency component and a noise component. The electric meter receives a current measurement signal from the current measurement device and filters the noise component from the current measurement, thereby creating a filtered current measurement signal. When the filtered current measurement signal is greater than a starting current threshold, the electric meter calculates an energy consumption measurement.

Abstract: An electrical energy meter includes an A/D converter and a processing circuit. The A/D converter is configured to generate digital samples of voltage and current waveforms in a polyphase electrical system. The processing circuit is operably coupled to receive the digital samples from the A/D converter and to integrate over time at least one digital sample multiple times to produce a filtered value from which harmonic distortion has been removed, identify a fundamental frequency only electrical parameter measurement for the polyphase electrical system with reference to the filtered value, and store the identified fundamental frequency only electrical parameter measurement in a data store.

Abstract: A method identifies a duration of power interruptions in an electrical monitoring system. The method includes receiving, with an external monitoring system, a load profile from an electric meter that includes at least one of an accumulated frequency measurement and an accumulated number of zero crossing events that the electric meter records in an AC power signal during a predetermined monitoring period, and identifying a total duration of at least one power interruption during the predetermined monitoring period based on at least one of a deviation of the accumulated frequency measurement in the load profile from a predetermined accumulated frequency value or a deviation of the accumulated number of zero crossing events in the load profile from a predetermined number of zero crossing events during the predetermined monitoring period.

Abstract: An electrical energy meter includes an A/D converter and a processing circuit. The A/D converter is configured to generate digital samples of voltage and current waveforms in a polyphase electrical system. The processing circuit is operably coupled to receive the digital samples from the A/D converter and to integrate over time at least one digital sample multiple times to produce a filtered value from which harmonic distortion has been removed, identify a fundamental frequency only electrical parameter measurement for the polyphase electrical system with reference to the filtered value, and store the identified fundamental frequency only electrical parameter measurement in a data store.

Abstract: A utility meter comprises a measurement circuit configured to measure consumption data, a memory configured to store meter data including the consumption data, and a receiver configured to receive a priority message from a source external to the utility meter. A meter display on the meter comprises a plurality of display segments. The meter display is configured to display the meter data according to a standard meter display routine. The meter display is further configured to display the priority message on at least a first portion of the plurality of display segments such that meter data normally displayed during the standard meter display routine is not displayed on the first portion of the plurality of display segments. A meter controller is configured to determine whether the standard meter display routine should be interrupted or overridden in order to display the remote message.

Abstract: A utility meter comprises a measurement circuit configured to measure consumption data, a memory configured to store meter data including the consumption data, and a receiver configured to receive a priority message from a source external to the utility meter. A meter display on the meter comprises a plurality of display segments. The meter display is configured to display the meter data according to a standard meter display routine. The meter display is further configured to display the priority message on at least a first portion of the plurality of display segments such that meter data normally displayed during the standard meter display routine is not displayed on the first portion of the plurality of display segments. A meter controller is configured to determine whether the standard meter display routine should be interrupted or overridden in order to display the remote message.

Abstract: A utility meter comprises a measurement circuit configured to measure consumption, a remote communications port, a local communications port, and a meter communications indicator. The meter communications indicator is configured to provide an indication that the meter is communicating with a remote device external to the meter over the remote communications port. The meter communications indicator is also configured to provide an indication that the meter is communicating with a local device external to the meter over the local communications port. The indication that communications are occurring over the local communications port is different from the indication that communications are occurring over the remote communications port. In at least one embodiment, the communications indicator is configured to provide an indication that communications are occurring simultaneously over the remote communications port and the local communications port.

Abstract: A utility meter comprises a measurement circuit configured to measure consumption data, a memory configured to store meter data including the consumption data, and a receiver configured to receive a priority message from a source external to the utility meter. A meter display on the meter comprises a plurality of display segments. The meter display is configured to display the meter data according to a standard meter display routine. The meter display is further configured to display the priority message on at least a first portion of the plurality of display segments such that meter data normally displayed during the standard meter display routine is not displayed on the first portion of the plurality of display segments. A meter controller is configured to determine whether the standard meter display routine should be interrupted or overridden in order to display the remote message.

Abstract: An apparatus for measuring energy consumption includes an input circuit and a processing circuit. The input circuit is operable to generate a first digital signal representative of a line voltage waveform and a second digital signal representative of a line current waveform. The processing circuit is operable to generate energy consumption data based on the first digital signal and the second digital signal. The processing circuit is further operable to generate a first pulse waveform having a plurality of output pulses based on the energy consumption data, each output pulse corresponding to a quantity of energy consumed, the first pulse waveform having a select one of a plurality of modes. The processing circuit is further operable to provide the first pulse waveform to a meter output.