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7622886 |
Method for determination of the risk to disturbance-free operation of a frequency converter
The invention relates to a method for determining the chance of a disturbance-free operation of a frequency converter ( 2 ) connected to a feeding network ( 18 ). According to the invention, during...
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7582986 |
Compensated inverse-time undervoltage load shedding systems
Provided is a compensated inverse-time undervoltage load shedding system and method for use in an electrical power system. The compensated inverse-time undervoltage load shedding system includes a...
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7576449 |
Method for converting direct voltage into three-phase alternating voltage
A method of converting a direct voltage generated by a decentralized power supply system into three-phase alternating voltage by means of a plurality of single-phase inverters (WR 1 -WR 3 ), said...
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7565459 |
Combination I/O modules in a modular automation controller
The invention describes combination I/O modules for automation. Various combinations of inputs and output with different electrical interfaces are offered providing greater flexibility in...
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7532956 |
Distributed power and protection system
A power distribution and protection system and method where an electrical power source distributes power to different load circuits and provides protection that changes on the fly as required by...
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7532955 |
Distributed protection system for power distribution systems
There is disclosed a protection system for a power distribution system having a plurality of breakers arranged in a hierarchy. The protection system has a network and a breaker coupled to the power...
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7526393 |
Virtual branch load management
A load estimation algorithm for automatically estimating power consumed by each branch load connected to circuit breakers in a power distribution panel (PDP) without requiring individual current...
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7526366 |
Electrical power control system, and method for setting electric state variables and/or parameters in a current conductor
The invention is directed toward an electrical power control system ( 1 ) in an electrical power system, having: a power control unit ( 2 ) for setting electric state variables and/or parameters in...
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7469190 |
Automated system approach to analyzing harmonic distortion in an electric power system
A method and system to detect and evaluate harmonic distortion in an electrical power system is disclosed. A plurality of monitoring devices is installed in the electrical power system. The...
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7463985 |
Electric power quality indicator device and method
A system and method of indicating power quality in an electric power system that generates an indication of power quality reflective of the worst observed power quality event over both a short and...
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7447567 |
Electric power system suppressing corona discharge from viewpoint of environment
The present invention provides an electric power system for stably supplying power while suppressing corona discharge generating ultraviolet radiation which may cause health problems in human...
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7446491 |
Intelligent power management for actuators
A system and method is disclosed for intelligent power management of actuators such as those used in papermaking. Multiple power supply units are connected to a common power bus. The power bus is...
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7421353 |
Digital integration method
This invention is a simplified method of digitally monitoring energy in a system. The power is measured at fixed periods, and the measurements summed in a register or accumulator. When the sum in...
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7412338 |
Radio frequency device within an energy sensor system
An energy measurement system including a radio frequency (“RF”) device powered by a solar panel. The RF device comprising a wireless communication port operative to transmit and receive...
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7352522 |
Control means and method of controlling a current through a coil
Method of controlling a current through a coil (L) for the generation of a magnetic field (H) in which: a parameter is determined which is a measure for the value of the resistance (R L ) of the...
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7337081 |
Metering device with control functionality and method thereof
A metering device of a power substation and method are provided for operating on a secondary analog waveform output by a transformer assembly receiving a primary waveform. The method includes...
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7321834 |
Method for calculating power flow solution of a power transmission network that includes interline power flow controller (IPFC)
Power flow models of Interline Power Flow Controllers (IPFC) for large-scale power systems are studied, in details. Mathematical models of the IPFC, using the d-q axis decompositions of control...
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7295133 |
Electrical circuit monitoring device
The present invention is directed to a method of (1) providing continuous monitoring of various operating and environmental characteristics using RFID technology or similar wireless technology and...
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7282924 |
Computerized electricity system having an arc fault detecting sub-system
A computerized electricity system for connecting loads to a power source, including: (a) an arc fault detecting sub-system having at least one module including: (i) a relay unit, electrically...
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7280893 |
Business management system and method for a deregulated electric power market
A business management method with interaction between an electrical energy supplier and a plurality of customer energy consumers includes the consumers providing respective electricity load...
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7259950 |
Load-protection control circuit of power supply
A load-protection control circuit of a power supply, which applies to the power supply that has a maximum power-limiting function. The power supply includes a power transformation circuit which...
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7236099 |
Household appliance with user interface with bi-colored LEDs
A household appliance, includes an appliance cabinet, an appliance user interface having multiple settings. Each setting has multiple selection options. There is a bi-color LED associated with each...
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7212951 |
Method for characterizing and analyzing 3-D shapes of molecules utilizing steric multiplets
Steric features inherent in the three dimensional disposition of atoms in molecules can be represented as multiplets using a defined set of steric descriptors. The resulting multiplets can be...
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7194338 |
Voltage collapse diagnostic and ATC system
An analysis method for an electrical power system whereby the plurality of buses are grouped into agents, family lines of agents and families of agents based on the reactive reserves depleted when...
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7133751 |
Method and apparatus for detecting on-die voltage variations
On-die voltage and/or frequency detectors. For one aspect, an adaptive frequency clock generation circuit includes a droop detector to detect a supply voltage level and to cause the frequency of an...
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7110864 |
Systems, devices, and methods for detecting arcs
Certain exemplary embodiments comprise method, the method comprising a plurality of activities comprising: for each of a plurality of potential arcing events associated with an alternating current:...
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7096175 |
Stability prediction for an electric power network
A method, device and computer program product for the prediction of the stability of an electric power network, where the method is executed after a fault or contingency has occurred, and comprises...
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7081827 |
Power over Ethernet-prioritized active splitter
A POE (power over Ethernet)-prioritized active splitter is disclosed for a prioritized network having different priorities such as a network security system that uses an intelligent POE power...
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7069116 |
High impedance fault detection
An apparatus, system, and method for detecting high impedance faults in electrical power lines using a composite high impedance fault detection system having a voter logic that samples the logical...
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7050959 |
Dynamic thermal management for integrated circuits
The present invention provides for dynamic thermal management of integrated circuits, including memory modules, within a computer system. The thermal management methodology described herein closely...
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7006010 |
Clamp assemblies and methods
Disclosed are systems and methods for indicating events at various locations in a power distribution system.
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6996746 |
Apparatus and method to handle power supply failures for a peripheral device
One embodiment of the invention is directed to a data processing system that includes an electrical detection circuit to determine whether the electrical power is going from “on” to “off,”...
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6985800 |
Protection of an electric power transmission network
For the control of an electric power transmission network, where local protection functions are implemented by a plurality of local protection devices ( 3,3 a, 3 b, 3 b′ ,3 c ) located at a...
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6975947 |
Power saving apparatus in an appliance
Disclosed a system and method of lengthening a life span of a battery power supply in an appliance such as a portable appliance, notebook computer or the like. A power saving method in an appliance...
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6963793 |
Distribution network monitoring and control system
A distribution network monitoring and control system for monitoring and controlling a distribution network system including monitoring and control means for taking in an information and for...
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6920404 |
Method of detecting residual capacity of secondary battery
Correlations between a residual capacity of a secondary battery and 4 parameters of an internal resistance, temperature, a discharge current and one of an open circuit voltage and a discharge...
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6907321 |
Fault control and restoration in a multi-feed power network
The present invention relates to a control system for automatically reconnecting power to customers in a distribution automation multi-feed power network on a fault disconnecting customers in the...
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6901298 |
Saving and restoring controller state and context in an open operating system
The present invention relates to a system and methodology for saving and restoring controller state and context in an industrial controller. In an aspect of the invention, the industrial controller...
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6882903 |
Electric device
This invention is intended to be capable of accurately detecting whether an electric device is in a stand-by mode or power stoppage occurs. An electric device 20 includes a power supply circuit ...
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6868311 |
Method and system for on-line dynamical screening of electric power system
A system for on-line dynamic screening of contingencies comprising postulated disturbances which an electric power system may experience, the system comprising a dynamic contingency screening...
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6794775 |
Sensorless stall detection for motors
Motor stall can be detected without the use of additional sensors in a hybrid stepper motor through the detection of a harmonic component an associated motor spectrum. The associate motor spectrum...
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6788512 |
Electronic trip unit capable of analog and digital setting of circuit breaker setpoints
A trip unit is provided with a microcontroller and non-volatile memory, such as EEPROM (Electrically Erasable Programmable Read Only Memory) or Flash memory, for storing trip setting values,...
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6775597 |
Security constrained optimal power flow method
A Security-Constrained Optimal Power Flow (SCOPF) process employing a quadratic programming (QP) primal-dual interior point (IP) solution method. The IP method efficiently solves practical SCOPF...
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6751561 |
Power saving method and apparatus for a portable appliance
Disclosed a system and method of lengthening a life span of a battery power supply in an appliance such as a portable appliance, notebook computer or the like. A power saving method in an appliance...
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6751528 |
Residential circuit arc detection
An electronically controlled circuit breaker for detecting arc and a method for detecting arc conditions are disclosed. The circuit breaker and method uses digital Fourier transformation on sampled...
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6741916 |
Accident point locating system
An accident point locating system locates an accident point on a power transmission line. A digital protective control system has a plurality of digital protective controllers that receive state...
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6718213 |
Variable base load energy management system and method
The present invention is a system and method for variable base load demand-side energy management. The system of the present invention includes a power reduction device receiving electrical power...
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6701221 |
Method and apparatus for preventing excessive heat generation in a alternator of a generator set
A method and apparatus are disclosed for preventing damage to an alternator of a genset resulting from high currents within the alternator. The method includes calculating, at a processor, a first...
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6687574 |
System and method for surveying utility outages
Utility failures are automatically detected and potential causes for these failures are automatically located and identified without having to physically search a utility provider's network....
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6687573 |
Recloser and fuse coordination scheme
An automatic power restoration device has a modifiable end point. The end point is indicative of the operational parameters of the automatic power restoration device. A user can modify the end...
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