Abstract: A circuit breaker having internal power monitoring and data signal generating apparatus, and a system for utilizing such a circuit breaker in a facility having a plurality of tenants served by branch circuits from a plurality of distribution panels. The circuit breaker radiates signals indicative of power consumption of the branch circuit protected thereby, together with a unique address identifier tied to one tenant. Electrical billings are based on summing all signals for each tenant. Changes to branch circuits during tenancy will not disturb correct billings since individual circuit breakers are associated with that tenant using power supplied by each branch circuit. Hence changes to branch circuits may be limited to modify building space locations served by the modified branch circuit, and need not be further modified to maintain correct billing in light of the circuit changes.

Abstract: A method for monitoring subsystem power includes, with a power control system of an electronic device, receiving energy usage data from one of a plurality of subsystems within the electronic device, with the power control system, maintaining energy usage data for the plurality of subsystems within the electronic device, and with the power control system, providing integrated energy usage data to one of the plurality of subsystems.

Abstract: A method includes measuring a first voltage (VA) across a first sensing coil of a linear variable differential transformer (LVDT) and measuring a second voltage (VB) across a second sensing coil of the LVDT. The method also includes signaling a core fallout condition in response to (i) determining that a ratio of VA and VB is within a specified range of a value of one and (ii) determining that a sum of VA and VB is less than a sum of VA0 and VB0 by more than a specified amount. VA0 and VB0 are minimum voltages across the first and second sensing coils of the LVDT, respectively, when a core of the LVDT is in the LVDT.

Abstract: An electric power planning apparatus is provided. The apparatus has an initial plan creating section, a generation amount probability density distribution creating section, an economic load dispatch calculating section, and a display section. The initial plan creating section creates an initial plan based on a demand predicted value, a predicted value of a natural energy electric power source power generation output amount, and electric power source equipment data. The generation amount probability density distribution creating section creates a probability density distribution using fluctuation bands of the demand and of the natural energy electric power source power generation output amount. The economic load dispatch calculating section calculates an output allocation based on the initial plan and the probability density distribution to create a prediction distribution of a power generation output of the controllable electric power source. The display section displays the prediction distribution.

Abstract: An intelligent electronic device IED has enhanced power quality and communications capabilities. The IED can perform energy analysis by waveform capture, detect transient on the front-end voltage input channels and provide revenue measurements. The IED splits and distributes the front-end input channels into separate circuits for scaling and processing by dedicated processors for specific applications by the IED. Front-end voltage input channels are split and distributed into separate circuits for transient detection, waveform capture analysis and revenue measurement, respectively. Front-end current channels are split and distributed into separate circuits for waveform capture analysis and revenue measurement, respectively.

Abstract: A system manages consumption of power supplied by at least one electric utility to multiple power consuming devices. Power flow to the power consuming devices is enabled and disabled by controllable devices controlled by one or more client devices. According to one embodiment, a group of one or more client devices to which to communicate a power control message is determined. The power control message indicates at least one of an amount of electric power to be reduced and an identification of one or more controllable devices to be instructed to disable a flow of electric power to one or more associated power consuming devices. The power control message is communicated to the determined group of client devices to initiate a power reduction event. Subsequent to initiation of the power reduction event, a determination is made that at least one controllable device has prematurely exited the power reduction event.

Abstract: Methods and structures for leakage screening are disclosed. A method includes sorting devices manufactured from the same device design into voltage bins corresponding to a respective supply voltage. The method further includes determining a respective total power of each of the voltage bins. The method further includes determining a respective uplift power of the voltage bins. The method further includes determining a respective first leakage screen value for each of the voltage bins based on the respective uplift power of each of the voltage bins.

Abstract: A method of real-time monitoring of the operation of a wind turbine in an operational region of theoretically constant power coefficient is disclosed. The method comprises measuring the electrical power generated by the wind turbine, a representative wind speed, and an ambient temperature. The wind power available to the wind turbine for a given moment in time may be calculated based on the measured ambient temperature and measured representative wind speed. The aerodynamic power captured by the wind turbine at the same moment in time may be determined based on the measured electrical power generated. And the practical power coefficient may be calculated by dividing the aerodynamic power captured by the calculated available wind power.

Abstract: The present invention provides an apparatus and methods for variably supplying power from a stand-alone fuel cell power supply system including a power conversion unit, a power switching unit and a load control unit. Preferably, a controller manages system configuration to switch the loads, the power conversion and the delivery between the two without reducing capacity by redundantly backing up each individual portion with a bank of at least two modules for each unit. Preferably, controller actuated devices are triggered automatically in response to monitors that sense performance operating parameters and detect values operating outside a threshold range.

Abstract: A power distribution unit (PDU) disposable in an electrical equipment rack. The PDU has a housing, a power input penetrating the housing, outlets in the housing, a processor disposed in the housing, voltage and current sensors, and a voltage calculation procedure communicable with the processor. The processor samples voltage and current waveforms and calculates RMS values and other power parameters. A method of managing electrical loads each drawing electrical power from a PDU includes repeatedly sampling voltage across and current flowing through each of the loads, calculating raw RMS values of voltage and current, and scaling the raw RMS values to obtain corrected RMS voltage and current values and other power parameters.

Abstract: A method for characterization of an energy storage device is disclosed. The method includes determining an instantaneous state of charge (SOC) value of the energy storage device during operation the energy storage device, and retrieving an instantaneous available discharging energy value of the energy storage device from a map based on a discharging power and the determined instantaneous SOC value of the energy storage device. The method further includes retrieving an instantaneous acceptable charging energy value of the energy storage device from another map based on a charging power and the determined instantaneous SOC value of the energy storage device.

Abstract: A data center energy management (DCEM) server configures a power supply in the data center. The DCEM server sums input alternating current (AC) power of the power supply to a total AC power of the data center, wherein the total AC power of the data center is a sum of AC power of a plurality of power supplies. The DCEM server sums output direct current (DC) power of the power supply to a total DC power of the data center and reports a ratio of total AC power to total DC power as data center power conversion efficiency. The DCEM server sets a preset power supply efficiency threshold. The DCEM server determines that a real-time power efficiency level is below the power supply efficiency threshold. The DCEM server, responsive to a determination that real-time power efficiency level is below the power supply efficiency threshold, may remedy the power supply.

Abstract: A system and method for extracting a skeleton topology structure for an electric power grid, the method comprising: receiving a description of a topology sub-structure corresponding with user's need and a description of skeleton topology sub-structure extracted from the topology sub-structure; generating a first incidence matrix based on the description of the topology sub-structure and a second incidence matrix based on the description of the skeleton topology sub-structure; generating a third incidence matrix based on a primary topology structure of electric power grid; searching from the third incidence matrix a sub-matrix that matches the first incidence matrix; obtaining a fourth incidence matrix by using the second incidence matrix to transform the matching sub-matrix; and generating a skeleton topology structure corresponding to the primary topology structure based on the fourth incidence matrix.

Abstract: A substation instrument control system is disclosed. The substation instrument control system includes a plurality of transformers that generate a plurality of waveform signals representing electric properties of a substation instrument main body. A merging unit is communicatively coupled to the plurality of transformers and includes a signal processing unit and a control unit. The signal processing unit receives the plurality of waveform signals from the plurality of transformers and converts the plurality of waveform signals to a digital signal. The control unit controls operation of the signal processing unit using a setting data. An intelligent electronic device is communicatively coupled to the merging unit and receives the digital signal from the merging unit.

Abstract: A vehicle starts traveling in an EV travel mode. When a reset request is issued to a first power storage unit, current control is performed to discharge actively the first power storage unit. After time when charging by an external power supply becomes allowed, a discharge current of the first power storage unit to be reset is kept at a constant current value, and a second power storage unit not to be reset is charged with a charge current including at least the discharge current of the first power storage unit. When a distinctive point appears on a battery voltage characteristic of the first power storage unit at a subsequent time, an estimated value of an SOC of the first power storage unit is reset to a predetermined reference value.

Abstract: A method for identifying conditions that correlate with one ore more events related to operation of a power grid. The method includes the determining one or more distinguishing characteristics of a first chunk. The first chunk includes data elements relevant to operating a power grid. The method also includes determining whether a distinguishing characteristic of the first chunk correlates with a distinguishing characteristic of one or more of a plurality of second chunks. Each second chunk includes a plurality of data elements corresponding with the data of the first chunk. The method further includes determining whether a second chunk, having a distinguishing characteristic equivalent to a distinguishing characteristic of the first chunk, is associated with the one or more events.

Abstract: A system for computing machine parameters of an induction machine includes a relation providing module and a circuit parameter computing module. The relation providing module is operable to provide a relationship between slip rates and primary side resistances of the induction machine and a relationship between the slip rates and primary side reactances of the induction machine. The circuit parameter computing module is operable to perform a parameter computing process according to the relationships obtained from the relation providing module. The parameter computing process includes the steps of: a) generating a set of initial values of equivalent circuit parameters of the induction machine; b) updating the initial values; c) calculating a cumulative resistance error and a cumulative reactance error; and d) repeating steps b) and c) until the cumulative resistance error and the cumulative reactance error are smaller than first and second error thresholds, respectively.

Abstract: A method of determining a current in a switched mode power supply. The method comprises: storing values representing at least one pre-calculated matrix A; receiving measured current values; and using the stored values representing the matrix A and the received current values to calculate a respective initial value for each of the coefficients of the line and for each measured current value: calculating an estimated current using the equation of the line and the calculated initial values of the coefficients; determining a difference between the measured current value and the estimated current value to generate a difference value, and comparing the difference value against a threshold and, if the difference value is greater than the threshold, calculating updated values of the coefficients using stored values representing matrix A and difference value.

Abstract: A merging unit, for example for substation automation, including at least one input interface for receiving input data characterizing at least one voltage and/or current related to a component of a power system, and a timing synchronization mechanism which includes an interface to an external synchronization network operating according to one of Inter Range Instrumentation Group, IRIG, -B standard, the 1PPS standard and the Institute of Electrical and the Electronics Engineers, IEEE, 1588 standard. The merging unit is configured to implement logical nodes according to the International Electrotechnical Commission, IEC, 61850-7 standard. The merging unit is configured to map information to and/or from at least one of the logical nodes; to the IEC 61850-9-2 sampled measured values, SMV, communication protocol.

Abstract: Techniques described herein generally relate to optimizing energy consumption in a computer system. In some examples an energy usage benchmark can be determined for a system component of the computer system by measuring performance levels and energy usages of the system component under a range of energy settings and utilization rates of the system component. A utilization rate of the system component can be determined based on prediction factors including the execution of a first set of instructions on the computer system. The system component can be configured to execute a second set of instructions after the first set of instructions by selecting an energy setting from the range of energy settings for operating the system component. The energy setting can be selected based on the energy usage benchmark and the determined utilization rate.

Abstract: A method and apparatus for controlling electric power supplied to one or more electrical devices from a power source are disclosed. Measurements of the supplied electricity are detected. Estimated deviant voltage levels that the supplied electricity will not drop below or exceed as a result of varying electrical consumption by the one or more electrical devices is computed based on a predetermined confidence level and the detected measurements. A voltage level output of the electricity supplied to the electrical device is adjusted based on the computed deviant voltage level.

Abstract: The subject matter described herein is directed to a power monitoring system for managing power in a data center. In one embodiment, the power monitoring system includes: at least one processor, a memory coupled to the at least one processor, wherein the memory includes, a computation module configured to compute at least one of peak power consumption and current power consumption of each power distribution point of a power distribution unit and an analysis module configured to identify the power distribution points which are overloaded or are underutilized based on a policy data.

Abstract: An electronic device that includes an integrated circuit and a memory is described. This integrated circuit monitors power sub-states within different operating modes of the electronic device. These power sub-states are associated with configurations of the electronic device and average power-consumption rates. Then, the integrated circuit stores information specifying a power-sub-state history of the electronic device in the memory, where the power-sub-state history includes amounts of time the electronic device was in one or more of the power sub-states. The stored information can be used to improve a power usage model for the electronic device and/or to modify a user experience, such as changing a performance of the electronic device or a time until a battery needs to be recharged.

Abstract: A method can include detecting a positive transition in a time trace disaggregation process (TTDP), creating a new instance j, capturing a positive transition data block for the instance j, creating a time trace feature description for power, reactive power, and current, and matching the instance j to a device type by performing a quick match based on at least one quick match parameters. Responsive to a positive identification based on the quick match, the instance j may be assigned to the device type.

Abstract: According to one aspect, embodiments of the invention provide a system for monitoring a plurality of circuit branches, the system comprising a plurality of current sensors, each configured to be coupled to at least one of the plurality of circuit branches and to produce a signal having a level related to a current level of the one of the plurality of circuit branches, a communications bus, a plurality of sensor circuits, wherein each one of the plurality of sensor circuits is configured to convert the signal from the associated one of the plurality of current sensors to a digital measurement signal and provide the digital measurement signal to the communication bus, and a controller configured to receive the digital measurement signal from each sensor circuit over the communication bus and transmit data related to the digital measurement signal from each sensor circuit to an external client.

Abstract: A method for detecting possible correlations between signal patterns of a power signal used by an electronic device during execution of operations, including setting couples of windows including respective pairs of sequences of the sampling values. The method includes computing values of correlations between the respective pairs of sequences. Each values may be determined by computing a maximum value of correlation between one sequence of a couple and a plurality of sequences of sampled values included in corresponding moving windows.

Abstract: In a method, operation of an electric power system which has a power utility automation system (1981-1984, 1991-1994) is monitored. The power utility automation system (1981-1984, 1991-1994) comprises a plurality of intelligent electronic devices (IEDs) (1981-1984, 1991-1994) communicating via a communication network. During operation of the electric power system, properties of the electric power system are monitored, the monitored properties comprising monitored data messages which are transmitted by the plurality of IEDs (1981-1984, 1991-1994) over the communication network. The monitored data messages are evaluated based on configuration information for the power utility automation system (1981-1984, 1991-1994) to detect a critical event. An alert signal is generated in response to detection of the critical event.

Abstract: According to one aspect, embodiments of the invention provide a system for monitoring a plurality of circuit branches coupled to an input line, the system comprising a communication bus, a plurality of sensor circuits, each configured to be coupled to the communication bus and at least one of the plurality of circuit branches, wherein each sensor circuit is further configured to sample current in the at least one of the plurality of circuit branches, a controller configured to be coupled to the communication bus and the input line; wherein the controller is further configured to sample voltage on the input line, and wherein the controller is further configured to synchronize, via the communication bus, current sampling performed by the plurality of sensor circuits with the voltage sampling performed by the controller.

Abstract: Illustrative embodiments of the present invention are directed to a method and system for disaggregating climate control energy use from non-climate control energy use for a building. The method includes receiving a series of building energy use values and corresponding outdoor temperature values for a time period. Each of the energy use values and outdoor temperature values is associated with a time interval. The method further includes determining a series of temperature difference values for the time period based on a difference in temperature between a predetermined baseline temperature and each of the outdoor temperature values. A regression analysis is used to determine a climate control coefficient and a non-climate control coefficient from the energy use values and temperature difference values. The climate control coefficient and/or the non-climate control coefficient is used to determine climate control energy use and/or non-climate control energy use for the building.

Abstract: The present invention provides a METHOD TO CALCULATE AN ENERGY EFFICIENCY RATING for information technology equipment. This method specifically pertains to information technology equipment that doubles its capabilities in a predetermined timeframe according to Moore's Law. This method uses a formula to calculate an energy efficiency rating based on power consumption and transactions per second. It further calculates a normalized rating where the absolute rating is adjusted based on Moore's Law prediction of improvements. As a result the method invented is the first and only method to compare information technology from various generations of hardware, processor and component architecture with each other in terms of their energy efficiency.

Abstract: A system and method that analyzes at least one aspect of the power grid for demand response in order to reduce feeder circuit losses is provided. The system and method may use a demand response model to select one or more factors for the demand response, such as selecting a subset of customers for demand response from a larger pool of available demand response customers. The demand response model may include a grid structure component, such as an indication of the particular customer's position in the grid, and a dynamic operation component, such as a real-time measurement of current in the feeder circuit. By using the demand response model, feeder circuit losses may thereby reduced.

Abstract: Establishing a power profile of power consuming components of computer system configurations for generating electrical ratings, beginning with a default, limited configuration of a computer system and continuing for a number of configurations of the computer system, each configuration including additional power consuming components not included in a previous configuration, where establishing a power profile includes: measuring, for a present configuration, power consumption of the computer system; calculating, in dependence upon the measured power consumption for the present configuration, an estimated power rating for the one or more additional power consuming components; and recording, in a power profile, estimated power ratings for the additional power consuming components, where the number of configurations of the computer system for which power consumption is measured is less than the number of possible configurations of the computer system.

Abstract: A method for improving the usability of photovoltaic installations (PV installations) by taking account of shading information of adjacent PV installations for forecasting the power output by a relevant PV installation is provided. In particular, cloud movements and cloud shapes are taken into account. This improves the accuracy of the forecast. Here, it is advantageous that short-term forecasts in relation to e.g. the next 15 minutes are possible and a substitute energy source can be activated accordingly, in good time, prior to a dip in the power output by the PV installation. The invention can be used e.g. in the field of renewable energies, PV installations or smart grids.

Abstract: Provided is a metering chip and a method of metering. The metering chip includes a first analog-to-digital converter connected to an output terminal of a current sensor for detecting a power supply current; and a noise canceller connected to an output terminal of the first analog-to-digital converter and can reduce its power consumption and size while accurately detecting a low current than before.

Abstract: An RF detector configured to provide two outputs, one being a function of the true RMS power level of an RF input signal, and the other being a function of the instantaneous/peak power of the RF input signal, normalized to the average power level. The RF detector includes a variable gain detection subsystem including a single detector or detector array that provides a representation of the power level of the RF input signal. The detector or detector array is common to both the RMS power detection channel and the instantaneous/peak power detection channel of the RF detector. A method of RF detection includes providing representations of the RF input signal at different gain levels, selecting one or more of the representations, and averaging the selected signals. The gain levels of the selected representations is adjusted to provide information about the average power level of the RF input signal.

Abstract: A system includes a power management unit that may be configured to estimate the power consumed by at least a portion of each of one or more processor cores during operation of each processor core. The power management unit may be configured to generate a sum of activity values and normal weight factor values for a predetermined set of signals within each processor core to estimate the power consumed. The power management unit may also be configured to adaptively generate and selectively use new weight factor values to estimate the power consumed based upon a total measured dynamic power consumed by each processor core during operation.

Abstract: A method for use in deploying computers into a data center includes calculating in a computer an expected peak power draw for a plurality of computers. The expected peak power draw for the plurality of computers is less than a sum of individual expected peak power draws for each computer from the plurality of computers.

Abstract: Disclosed is an image processing apparatus including: an image processor which processes and displays an image signal; a communication unit which transmits a power consumption of the image processing apparatus to a power control server, and receives a message notifying necessary power saving function from the power control server; and a controller which controls the image processor to display a power load warning message and performs a power saving function in response to the power load warning message if the message notifying the necessary power saving function is received. With this, while operation rate of the power plant having high costs is lowered, low carbon emission of the plant may be achieved and a user of the image processing apparatus may reduce power consumption by performing a power saving function.

Abstract: The invention relates to a system of domestic appliances, wherein the domestic appliances are operated from a branch of an, in particular public, supply system for electrical energy at a customary system frequency, wherein, in particular, the consumed energy which is supplied to the branch can be detected, and wherein a display and measurement unit is present, this allowing the energy consumed by an individual domestic appliance to be displayed and measured. In this case, the functioning thereof for determining the consumption of the individual domestic appliance is based on the analysis of a characteristic structure, which can be assigned to the individual domestic appliance, of current and/or voltage profiles within system period time intervals during operation of the individual domestic appliance, wherein, for individual domestic appliances of which the inherent characteristic structure is small, said characteristic structure can be formed or added to by a structure generator (ESM, ES1 to ESN).

Abstract: A mechanism is provided for automatically tuning power proxy architectures. Based on the set of conditions related to an application being executed on a microprocessor core, a weight factor to use for each activity in a set of activities being monitored for the microprocessor core is identified, thereby forming a set of weight factors. A power usage estimate value is generated using the set of activities and the set of weight factors. A determination is made as to whether the power usage estimate value is greater than a power proxy threshold value identifying a maximum power usage for the microprocessor core. Responsive to the power usage estimate value being greater than the power proxy threshold value, a set of signals is sent to one or more on-chip actuators in the power proxy unit associated with the microprocessor core and a set of operational parameters associated with the component are adjusted.

Abstract: Equipment and methods for estimating and regulating the state of charge (SOC) of a battery in a hybrid fuel cell-battery system for use in a moving vehicle. The SOC is continuously estimated and the fuel cell power is regulated to maintain the SOC at a level such that the battery has enough stored energy to operate motors used in the vehicle, and enough spare capacity to accept regenerative energy from these motors during further operations.

Abstract: A method can include receiving raw data having power samples that correspond to various types of electrical devices. A cycle detector can process the power samples to detect a masking data cycle and determine masking parameters that characterize the masking data cycle. The power samples can be stored in a circular data buffer, and the masking parameters can be stored in a circular cycle parameter buffer. A cycle characterization can determine whether there is masking data within the raw data and, if there is, call a removal process to remove the masking data.

Abstract: A wireless mesh network is configured to manage a power grid. Each node within the wireless mesh network is configured to detect and classify voltage fluctuations in power supplied by an upstream transformer coupled to the power grid. When a given node detects a particular type of fluctuation (i.e., an “event”), the node generates a timestamped event classification that reflects the type of event and a time when the event occurred. A server configured to manage the wireless mesh network receives timestamped event classifications from each node within the wireless mesh network and then performs a time correlation with the received timestamped event classifications to determine which nodes detected similar events. When two or more nodes detected the same event at similar times, the server determines that those nodes are coupled to the same transformer.

Abstract: In various energy systems which handle a plurality of types of energy, a method and device for operation scheduling for energy storage equipment are provided, which determines optimal operation of an energy storage equipment and improves the efficiency of the energy system overall. An energy storage equipment operation scheduling part 13 creates an energy storage equipment operation schedule, an energy generation equipment modified operation schedule, and an energy storage equipment modified operation schedule, based on three information items, which are the energy demand forecast information stored in a storage part D1, the energy generation equipment operation schedule stored in a storage part D2, and equipment connection information, and sends the created schedules to the equipment controller 20.

Abstract: Power management systems and methods are presented. In one embodiment, implementation of a method for context specific power management of a resource, comprises: defining a context within which a resource operates, wherein the context is defined by one or more parameters; tracking a usage history of the resource operating within the context to determine passive user feedback related to a plurality of timeout values; and determining a timeout value for a current operation of the resource within the context based on the usage history.

Abstract: A tool for configuring a branch current monitor facilitates mapping the connections of branch circuits to voltage sources in a power distribution panel.

Abstract: A power monitor includes a power conditioning circuit that provides conditioned power to a load. The power conditioning circuit includes at least one sensor to measure a power quality characteristic, e.g., input voltage, load current, temperature, etc. A terminal device implements a diagnostic tool for the power monitor and includes a processor to obtain data indicative of the power quality characteristic over a communication link with the power monitor. The data may be retrieved in response to a trigger condition. A user interface implemented on the terminal device displays the obtained power quality characteristic as at least one temporally varying waveform.

Abstract: The invention provides an in-line power monitor for an RF transmission line that is capable of being calibrated in-line during live conditions at the exact power level and frequency where it is used. This device uses forward and reflected directional couplers and a non-directional coupler to sample the RF voltage on the transmission line. The RF voltage of the forward and reflected channels are each split into two paths, one going to a test port and the other leading to additional circuitry which prepares the signals of the forward and reflected channels for output to power displays. Additionally, the monitor allows the user to compensate for any voltage offsets introduced by various circuitry components. Further, the monitor also allows to user to individually calibrate the output of the forward and reflected channels by applying an adjustable gain ratio correction to each channel.

Abstract: System and methods to determine the energy consumption per event type from usage data of portable devices are described. An example method includes determining a first plurality of linear equations representative of energy expended in a portable device for a second plurality of functions, the second plurality of functions including at least one software function of the portable device, the first plurality being more than the second plurality, and determining, using a processor, energy values corresponding to the second plurality of functions by applying a statistical method to the first plurality of linear equations.

Abstract: In one embodiment, a notification server 110 may batch together notifications to reduce power consumption. A notification server 110 may receive a power consumption profile 430 from a client device 120. The notification server 110 may assign a notification batch schedule at a notification server 110 based on the power consumption profile 430.