Abstract: Devices and methods for identifying an electrical device, and its state, in a network of electrical devices are disclosed. An energy monitoring device is programmed to identify an electrical device coupled to a power supply, and a state of the electrical device, from a change in successive measurements of the power supply. Algorithms for determining a load signature for an electrical device and its state are disclosed. A stored table of load signatures for states is used to identify devices, and states. Energy monitoring information is collected and presented to the user on a display, a remote display, or is transmitted over a network to a remote device such as a personal computer, personal digital assistant, an iPhone, a cell phone, voice mail, email, or text message.

Abstract: A method measures the electric power of a universal electric motor (4) connected to an electric power mains (6) by a Triac (7) and supplied by sinusoidal alternating voltage (V(t)). The method determines a first (ton) and a second (toff) instant at which the current (I(t)) supplied to the motor (4) passes from a zero value to a value other than zero. The current supplied to the motor (4) at a third instant between the first (ton) and second (toff) instant is measured. A fitting current time pattern (f(t)) approximating the real time pattern of the current (I(t)), and which has a zero current value at the first (ton) and second (toff) instant, and a current value equal to a sampled current at the third instant (tin), is determined. The mean electric power is calculated on the basis of the fitting current time pattern (f(t)).

Abstract: Embodiments pertain to devices and systems having simulator circuitry, particularly to simulator circuitry configured to simulate an electric vehicle and test an electric vehicle charger. A test unit is configured to simulate a GFI current via modulator and to simulate electric vehicle loads via switched and combined resistor loads. The test unit provides for reprogramming of the electric vehicle charger via a pilot line. The test unit self-confirms its usability via associating received codes.

Abstract: Disclosed is an identification apparatus including an acquisition unit configured to acquire power generation information from a power generation unit; and an identification unit configured to identify a behavior characteristic in accordance with the power generation information.

Abstract: A method and system of adaptive power control based on pre package characterization of integrated circuits. Characteristics of a specific integrated circuit are used to adaptively control power of the integrated circuit.

Abstract: One or more example diagnostics may be implemented as part of an intelligent luminaire manager or other radio frequency (RF) device that is in communication with an equipment or fixture such as a luminaire. Example diagnostics can determine a status such as a fixture malfunction, a cycling condition, a miswiring configuration, or another condition. The determined status can be wirelessly transmitted from the intelligent luminaire manager or other radio frequency device to a network server via a network. The network may be a network of intelligent luminaire managers and/or RF devices.

Abstract: Provided is a measurement apparatus that measures a signal under measurement, including a strobe timing generator that sequentially generates strobes arranged at substantially equal time intervals; a level comparing section that detects a signal level of the signal under measurement at a timing of each sequentially provided strobe; a capture memory that stores therein a data sequence of the signal levels sequentially detected by the level comparing section; a window function multiplying section that multiplies the data sequence by a window function; a frequency domain converting section that converts the data sequence multiplied by the window function into a spectrum in the frequency domain; and an instantaneous phase noise calculating section that calculates instantaneous phase noise on a time axis of the signal under measurement, based on the spectrum.

Abstract: An equivalent power method for reducing the effects of voltage variation during at least one active material actuation event, includes determining an applied real output based on the ideal voltage of a voltage source, the corresponding ideal output of a controller, and a measured real voltage, and for providing voltage out of bounds compensation, by further determining a difference based on the maximum available power output of the controller during said at least one event, and applying the difference to determine the applied real output during subsequent event(s).

Abstract: A method for detecting unbalance in a 3-phase voltage signal is disclosed. The method includes determining an unbalance indicator as a value of a square of an amplitude of a positive sequence of the voltage signal; and comparing the unbalance indicator with a threshold to determine unbalance of the voltage signal.

Abstract: The present invention generally teaches systems and methods for creating appliance signatures based upon whole house composite load profiles. Methods may includes steps such as identifying primitive elements including transients and absolute steady state levels; clustering the primitive elements along multiple dimensions to form impulses; combining impulses to form simple bundles; combining simple bundles with each other or impulses to form complex bundles; and determining specific appliance signatures that substantially match the complex bundles. Methods may also include steps such as determining transitions within the whole house composite load profile; determining household specific appliance state machines for each appliance in the household; and disaggregating the whole house composite load profile into individual appliance energy loads by assigning the determined transitions to the determined household specific appliance state machines.

Abstract: In a watt-hour meter, encoders 116, 117, 118 and 119 respectively convert a signal concerning a current and voltage used by a customer into a code sequence signal by Reed-Solomon codes or convolutional codes. Decoders 121, 122, 123, and 124 reversely convert the code sequence signal to the signal concerning the current and voltage. A power calculating section 125 converts the signal concerning the current and voltage into data concerning electricity consumption.

Abstract: An electric power leveling controller includes an information acquisition unit that acquires information of electric energy consumption from a power consuming device consuming electric energy from the power source and electric energy charged into a power storage device, a storage unit that stores a specific threshold value for each power storage device, and a control unit that causes a first power consuming device to be power-supplied by the power source, causing the power storage device corresponding to the first power consuming device to be charged with a difference between the specific threshold value and the electric energy consumption, causing the power source to supply to a second power consuming device electric energy corresponding to the specific threshold, and causing the power storage device corresponding to the second power consuming device to discharge to the second power consuming device the difference between the electric energy consumption and the specific threshold value.

Abstract: Techniques are provided for managing the infrastructure (power distribution chain) of an information technology (IT) facility, sometimes referred to herein as a data center, comprising hierarchically arranged low-level and higher level components. This power distribution chain management occurs at the phase-level (i.e., at each of the phases of power that are utilized in the power distribution chain). In one example, characteristics representing the consumption of power of one or more of the low-level components are obtained. Based on the obtained characteristics, the power consumption for each of a plurality of the higher-level components is determined. Based on the power consumption determined for each of the plurality of higher-level components, a global power consumption, at the phase-level, for the entire power distribution chain is determined at the one or more low-level components.

Abstract: A mechanism is provided for dynamically power capping one or more units. A power capping mechanism sets a counter value corresponding to an initial energy budget assigned to a unit for a given interval. Responsive to the unit receiving an operation to perform during the given interval, the power capping mechanism decrements the counter value by a decrement value. Responsive to the given interval expiring, the power capping mechanism sends the counter value to a power control loop in the data processing system, receives a new energy budget from the power control loop, and resets the counter value to a value corresponding to the new energy budget assigned to the unit for a next interval.

Abstract: A system and method of testing a power system component is disclosed. The system and method comprises coupling a test set to the power system component and stimulating the power system component with a frequency sweep signal. The method also comprises capturing a response of the power system component to the frequency sweep signal, wherein the response relates to frequency and mapping the response to an estimated response, wherein the estimated response relates to temperature. The method also comprises evaluating the power system component based on the estimated response.

Abstract: A method and system for aggregating messages. In one embodiment, the system comprises a plurality of distributed generators (DGs) and a controller, communicatively coupled to the plurality of distributed generators, for (i) receiving a plurality of messages from the plurality of DGs, (ii) correlating at least two messages in the plurality of messages based on at least one time parameter, and (iii) generating a summary message based on the at least two messages.

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 synchronized pseudorandom sequence injector is provided for injecting a plurality of pseudorandom signals at selected locations in a power system having a plurality of locations forming a transmission and distribution grid. A synchronization pulse generator generates an accurate reference clocking signal. A pseudorandom clocking and sequence generator receives the clocking signal and generates a string of pseudorandom sequences. A binary drive control creates a tri-state voltage output from a logic level output of the pseudorandom clocking and sequence generator. A signal conditioning interface processes the voltage output to attenuate any protection related carrier signals from a pseudorandom signal injection point at a selected location.

Abstract: A power computing apparatus and method is provided. The power computing apparatus includes: a multiplexer configured to receive detected single-phase current and voltage signals and output a single analog signal; an analog-to-digital converter configured to convert the analog signal output from the multiplexer into a digital signal; a demultiplexer configured to separate the digital conversion signal output from the analog-to-digital converter into digital signals representing single-phase current and voltage and output the separated digital signals; a phase detector configured to detect a phase angle between the single-phase current and voltage signals; and a power computing block configured to compute power from the digital current and voltage signals output from the demultiplexer by using error compensation parameter and the phase angle detected by the phase detector.

Abstract: Some embodiments concern a method of detecting usage of one or more electrical devices coupled to an electrical power line. An electrical power signal with a predetermined period is on the electrical power line. The one or more electrical devices place one or more noise signals on the electrical power line. The electrical power signal comprises the one or more noise signals. The method can include: using a data acquisition device to acquire first data about the electrical power signal on the electrical power line such that the acquiring of the first data is synchronized with the predetermined period of the electrical power signal; processing the first data to create frequency domain data; and applying a feature extraction algorithm to the frequency domain data to determine a transition of an electrical state of at least a first one of the one or more electrical devices. Other embodiments are disclosed.

Abstract: Provided is a device and system for performing communication using wireless power, and a communication device using wireless power. The device may calculate a slope of an envelope in a waveform of energy stored in a target resonator through mutual resonance with a source resonator, and estimate a point placed within a predetermined interval around a point at which the slope reaches a maximum as a starting point of the mutual resonance between the source resonator and the target resonator.

Abstract: A real-time distributed wide area monitoring system is presented. The real-time distributed wide area monitoring system includes a plurality of phasor measurement units that measure respective synchronized phasor data of voltages and currents. The real-time distributed wide area monitoring system further includes a plurality of processing subsystems distributed in a power system, wherein at least one of the plurality of processing subsystems is configured to receive a subset of the respective synchronized phasor data, process the received subset of the respective synchronized phasor data to determine respective system parameters, wherein the plurality of processing subsystems are time synchronized.

Abstract: There is provided a decomposition calculating apparatus in which the first storage stores therein a connection configuration of a plurality of elements in an electric power system, the second storage stores therein possible ranges of respective quantities of consumed energy of the elements, the solution region generator develops the ranges of the quantities of consumed energy, in a space formed by axes indicative of the respective quantities of consumed energy of the elements and obtains a solution region being a region common to the ranges of the quantities of consumed energy in the space, the enclosing ball calculator obtains a ball which encloses the solution region and has a smallest radius, and acquires a central coordinate of the ball, and the proportional division determiner determines quantities of consumed energy of the elements to values of the axes corresponding to the central coordinate in the space.

Abstract: A method for energy consumption monitoring in an ICT environment, wherein the ICT environment (1) includes a multitude of energy consuming components (2, 3), at least partly the components (2, 3) being instrumented with elements for energy consumption monitoring and/or having assigned specific energy consumption models that derive one or more energy metrics for the respective component (2, 3) from the component's (2, 3) current performance metrics, is characterized in the steps of ascertaining changes of and/or related to the ICT environment (1) via an energy consumption monitoring controller (7), performing an assessment of available energy consumption monitoring techniques both instrumentation-based and model-based, based on the result of the assessment selecting one or more energy consumption monitoring techniques that best satisfy the change of the ICT environment (1) according to predefined policies. Furthermore, a corresponding monitoring system is described.

Abstract: There is provided a power generation predicting apparatus in which an estimator estimates a maximum power generation amount capable of generating by a photovoltaic power generation system at each time, a first estimating unit estimates a power generation inhibitor total amount being a total of power generation inhibiting substances which are present until a solar light reaches the system, at each time, a weight calculating unit calculates a solar radiation weight for each of three-dimensional cells at each time, based on a straight line passing through the cells forming a three-dimensional space above a prediction target area at which the system is placed, a second estimating unit estimates a power generation inhibitor amount at a prediction target time for each of the cells, and a predicting unit calculates a power generation inhibitor total amount at the prediction target time, and predicts a power generation amount at the prediction target time.

Abstract: A method of calculating a current correction formula may include first measuring voltage values at each of current measuring parts configured to measure currents in socket parts of a power strip in a state in which no current flows in the socket parts, second measuring the voltage values at each of the current measuring parts in a state in which a current flows in one of the socket parts, and calculating a correction formula formed by a inverse matrix of a matrix having as its elements differences between the voltage values measured by the second measuring and the voltage values measured by the first measuring.

Abstract: Calculating device and method for carrying out status calculations in an electricity network (2) with a multiplicity of nodes (K1-K11). The method comprises the allocation of a local calculating agent (A1-A11) to each of the multiplicity of nodes (K1-K11), the allocation of regional calculating agents (R1, R2) to regional networks (3, 4), the reception by the regional calculating agents (R1, R2) of the results of the status calculations from the associated local calculating agents (A1-A1) and, on the basis thereof, the performance of a status calculation for the associated regional network (3, 4).

Abstract: A power measuring system for measuring a turning-on power, a turning-off power, and a turned-on power of a first field-effect transistor includes a pulse driver, a first resistor, a processing unit, and an indication unit. The pulse driver generates square wave signals. The processing unit samples voltages at the source and the drain of the first field-effect transistor, and at the first and second terminals of the first resistor at the moment when the square wave signals changes from low to high or from high to low, and calculates the turning-on power, the turning-off power, and the turned-on power of the first field-effect transistor. The indication unit displays the turning-on power, the turning-off power, and the turned-on power of the first field-effect transistor.

Abstract: An evaluation method of a progressive-addition lens is provided. First, powers of the progressive-addition lens at a plurality of measurement points are measured to obtain an actually measured power distribution. Next, a comparison power distribution created based on the actually measured power distribution and a defective power distribution prepared in advance are compared with each other to perform similarity search between the both. Thereafter, whether or not the comparison power distribution and the defective power distribution are similar to each other is determined based on the result of the similarity search step, and if it is determined that the comparison power distribution and the defective power distribution are similar to each other, then the progressive-addition lens is evaluated as defective.

Abstract: Real-time power line rating may be provided. First, sensor data may be received corresponding to a conductor of a power line. The sensor data may provide real-time weather conditions for the conductor's environment. The sensor data may be received from a sensor device configured to collect the sensor data. The sensor data may correspond to the weather conditions at a location of the sensor device on the power line. Next, design limitations for the power line having the conductor may be received. The conductor of the power line may have a design ampacity based upon the design limitations and assumed weather conditions for the conductor's environment. Then a dynamic ampacity may be calculated for the power line based upon the received sensor data and the received design limitations for the power line. The power line may then be operated according to the calculated dynamic ampacity instead of the design ampacity.

Abstract: A system and method for directing a user to configure a power device via an alphanumeric user interface is provided. The power device may include data storage storing a plurality of operational parameters. The method includes acts of prompting, during an initial power-up of the power device, a user to enter an indication of quality of power supplied to the power device, receiving the indication via the user interface, determining a first value for each of the plurality of operational parameters of the power device based at least in part on the indication and applying each first value of the plurality of operational parameters to the power device.

Abstract: A method for forecasting wind energy production is disclosed. The method includes collecting power data indicative of power output from a set of wind energy installations with a first wind energy installation at a first site and a second wind energy installation at a second site, and estimating the available power output at a forecasting site located at a geographic position. The estimating is based on power data from the set of wind energy installations by projecting the power data towards the future and/or the geographic position of the forecasting site. Further disclosed is a method for scheduling wind energy production for an electricity grid and a wind energy production forecasting system configured for forecasting output power of a wind energy installation.

Abstract: Methods and devices are presented herein for estimating induction motor inductance parameters based on instantaneous reactive power. The induction motor inductance parameters, e.g., the stator inductance and the total leakage factor, can be estimated from motor nameplate data and instantaneous reactive power without involving speed sensors or electronic injection circuits.

Abstract: A method and apparatus provides improved resolution in an analog signal, relative to the resolution of a digital-to-analog converter producing the signal. In one embodiment, a digital electrical power and energy meter varies a digital input to a digital-to-analog converter such that an average of the output of the digital-to-analog converter indicates a value with greater resolution than the instantaneous resolution of the digital-to-analog converter.

Abstract: A method for monitoring input power to an electronically commutated motor (ECM) is described. The method includes determining, with a processing device, an average input current to the motor, the average input current based on a voltage drop across a shunt resistor in series with the motor, measuring an average input voltage applied to the motor utilizing the processing device, multiplying the average input current by the average voltage to determine an approximate input power, and communicating the average input power to an external interface.

Abstract: In a data center which includes a plurality of servers, a discovery computer, a power measurement system (PMS), and a plurality of power-circuits which supply power to the servers, the discovery computer performs the following actions for each server. It transmits a first command to the server causing the server to start generating a power consumption signature if the server is able to do so. Upon receiving a SUCCESS response from the server, it instructs the PMS to start measuring the power consumption from each power-circuit. After a prescribed interval of time has elapsed, it collects the measurements from the PMS and analyzes the measurements to look for the presence of the signature. Upon detecting the signature in the measurement taken from a particular power-circuit, the discovery computer concludes that the server is connected to the particular power-circuit and creates a mapping there-between.

Abstract: A method of determining out of step condition and an instance of separation within electrical power system. The method does not require user settings and ensures reliable discrimination between recoverable power swing and pole slips that indicates non-recoverable power swing and the need for system separation. The method also allows tripping at a user selected system angle if desired. A calculated angle is used to determine the magnitude of the swing current to control the tripping at the desired angle ? when the system could be safely split after detection of out of step condition based on the criteria of this invention.

Abstract: According to a present alternating-current electric quantity measuring apparatus, a voltage amplitude calculated by a square integral operation of at least three continuous voltage instantaneous values sampled at a sampling frequency twice or higher than a frequency of an alternating-current voltage to be measured is normalized. A voltage chord length calculated by the square integral operation of three voltage chord length instantaneous values representing an end-to-end distance between two adjacent voltage instantaneous values in at least four continuous voltage instantaneous values including the three voltage instantaneous values, which are sampled at the sampling frequency and used in calculating the normalized voltage amplitude, is normalized. A rotation phase angle in one period time of sampling is calculated using the normalized voltage amplitude and the normalized voltage chord length. A frequency of the alternating-current voltage is calculated using the calculated rotation phase angle.

Abstract: Exemplary embodiments of the present disclosure automatically generate Virtual Local Area Network (VLAN) configuration data from a logical data flow between intelligent electronic devices (IEDs) of a process control (PC) system in accordance with a standardized configuration representation of the system. The process IEDs, switches of an Ethernet switch-based communication network to which the IEDs are connected, and connecting cables are made aware of the assigned VLANs. Any performance analysis or diagnosis on these components can show design problems with VLANs and communication architecture already at engineering or communication system design time.

Abstract: A method for dynamic timing-dependent power estimation for a digital circuit having coupled interconnects and at least two gates. In one embodiment, the method includes the steps of capturing information on relative switching activities and timing dependence for the coupled interconnects in the digital circuit, estimating the probabilities associated with switching activities and timing dependence for each gate in the digital circuit from the captured information, and obtaining dynamic power estimation of the digital circuit from the estimations of the probabilities.

Abstract: Provided are a performance verification system for a renewable energy module and a method thereof, and more particularly, a performance verification apparatus for a renewable energy module capable of improving measurement precision for a variable output state of the renewable energy module, such as a solar cell, and reducing an error through an electrical load and a precise measurement unit, and a method thereof. It is possible to increase reliability of real measurement data and calculate a result closest to a maximum power point by compensating for power loss caused by resistance of a cable constituting a system, internal resistance of a voltage sensor, and a measurement cable.

Abstract: A system and method for evaluating equipment in a data center, the equipment including a plurality of equipment racks, and at least one cooling provider. In one aspect, a method includes receiving data regarding each of the plurality of equipment racks and the at least one cooling provider, the data including a layout of the equipment racks and the at least one cooling provider, a power draw value for each of the equipment racks, and a maximum cooler capacity value for the at least one cooling provider; storing the received data; determining cooling performance of at least one of the plurality of equipment racks based on the layout; determining a cooling load for the at least one cooler and a difference between the cooling load and the maximum cooler capacity value; for each equipment rack, determining a maximum rack capacity based on the layout and the difference between the cooling load and the maximum cooler capacity value; and displaying an indication of the maximum rack capacity for each equipment rack.

Abstract: System and method include precisely modeling of a facility's energy usage over time based on historic data, and precisely predicting or measuring its actual, reduced energy usage over time after a redesign, retrofit, or renovation, or other positive change to the facility. The energy cost savings, whether over a time point of view (POV) of predicted, real-time, or historic, are creditable to the intervening remediation or renovation of the facility's energy footprint. In accordance with one embodiment, multiple-variable inputs are modeled using arithmetic regression and steepest-descent convergence arithmetic solutions based in large part on building-science (construction) data versus outside average temperature (t) that simplifies the modeling and measurements. Additionality is thus addressed along with a system and method that is more accurate, more repeatable, more reliable, and thus more credible and more readily monetized.

Abstract: An electric-power-generation level predicting apparatus 1 includes a memory unit 20 that stores, as past data relating to a past electric power generation level of an electric power generator, past data containing information at multiple time points in each day, and an predicted-value calculating unit 13 that calculates, as time-series data containing an occurrence probability, an predicted value of the past data relating to an electric power generation level of the electric power generator based on a statistical correlation between different times in the past data or a statistical correlation between locations of the different electric power generators. The predicted-value calculating unit 13 includes a variance-covariance-matrix generator unit 131 that generates a variance-covariance matrix based on the past data, and a random-number generator unit 132 that generates a random number following the probability distribution based on the variance-covariance matrix.

Abstract: An arrangement for use in a distributed system for an energy grid includes a processing circuit and a plurality of destination nodes coupled to the processing circuit. The processing circuit is configured to calculate a desired destination index for each of the plurality of destination nodes based on a desired aggregate index for the plurality of destination nodes, wherein the desired aggregate index includes information representative of carbon consumption, and communicate each desired destination index to the corresponding one of the plurality of destination nodes. Each of the plurality of destination nodes is configured to receive the desired destination index from the processing circuit, and display the desired destination index on a display.

Abstract: A determination determines permission/forbiddance to charge an accumulator that obtains electrical power from a power grid network. The determination device comprises a first acquisition unit configured to acquire first information about a requested power amount requested to charge the accumulator, a second acquisition unit configured to acquire second information about an available power amount that can be provided from the power grid network, and a determination unit configured to determine permission or forbiddance with respect to the accumulator based on the first information and the second information.

Abstract: A system for enhancing deferrable load management of a distribution transformer includes a memory device configured to store a plurality of operational measurements of a distribution transformer and at least one deferrable load. The system also includes a processor coupled in communication with the memory device. The processor is programmed to record a first operational measurement of the distribution transformer that is configured to transmit electric power to the at least one deferrable load. The processor is also programmed to record a second operational measurement of the at least one deferrable load. The processor is further programmed to determine a priority of energization of the at least one deferrable load within a queue as a function of at least one of the first operational measurement and the second operational measurement.

Abstract: This invention discloses an electronic device with electricity recording function and an electricity recording method thereof. The electronic device comprises a power module, a gauging module, a storage module and a processing module. A type and a level of the power module are gauged by the gauging module and stored by the storage module during a buffering time before the electronic device is shut down. When the electronic device is powered on, the processing module is used to take the type and the level of the power module from the storage module for reducing the waiting time of the electronic device when it is powered on.

Abstract: The physical quantity measurement device involves a terminal unit, a sensor, a storage unit, an output unit, a communication unit, a control unit, and a discriminating unit. The terminal unit has a power terminal, an output terminal, and a ground terminal. The communication unit uses the power terminal in order to receive a serial signal from an external device. The control unit has an adjusting mode and a normal mode. The discriminating unit decides that the external device requests either the adjusting mode or the normal mode based on whether or not an electrical potential of each of the power terminal and the output terminal satisfies a predetermined condition. The control unit selects the normal mode when the discriminating unit decides that the external device requests the normal mode, and selects the adjusting mode when the discriminating unit decides that the external device request the adjusting mode.

Abstract: An optimizer for a single staged refrigeration system comprising a speed modulation device, controller, and supply air temperature sensor. The optimizer is intended for modulating the speed of the indoor fan and compressor in existing or new refrigeration systems in settings including but not limited to residential houses/buildings, residential heat pump systems, commercial heat pumps systems, water source heat pumps, and roof top units. The optimizer solves humidity and noise problems in existing systems, reduces peak demand, increases energy efficiency, reduces energy consumption rates, and minimizes compressor failure rates and O&M costs.