Abstract: Contingency analysis is executed to simulate operation of an electrical power system under different contingencies that reflect an individual outage of different respective pieces of equipment in the system. For each of the different contingencies, it is quantified how impactful the individual outage of the respective piece of equipment would be to the system's performance. For example, this may be quantified across multiple dimensions of performance, by calculating dimension-specific scores for the respective dimensions and synthesizing the dimension-specific scores into a unified criticality score for a piece of equipment. Regardless, the criticality scores for the pieces of equipment may better inform control of the electrical power system.

Abstract: Disclosed are tunable intraocular lenses and methods of adjusting a cylinder power of an intraocular lens. In one aspect, the intraocular lens can comprise an optic portion. The optic portion can comprise a first polymeric bead located at a first location along an exterior of the optic portion and a second polymeric bead located at a second location along the exterior of the optic portion diametrically opposed to the first location.

Abstract: A fastening system for joining two opposing ends of flexible conveyor belt segments includes mating sets of rigid connectors embedded in and extending from confronting ends of the flexible conveyor belt segments. The rigid connectors include laterally-extending load-transferring surfaces that interface to transmit axial tension between the confronting segment ends, or hinge elements that interleave to form a hinge passageway for receiving a connecting rod. The rigid connectors are chemically bonded to the conveyor belt segment ends through microscopic entanglement, a mechanical bond, adhesive bond or through another suitable process.

Abstract: Illustrative embodiments of systems and methods for detecting and responding to islanding of distributed energy resources are disclosed. In at least one illustrative embodiment, a method may include measuring voltage and current at a connection point between a distributed energy resource and an electrical grid, determining a Thévenin impedance of the electrical grid based upon the voltage and current measurements, and determining whether the Thévenin impedance has exceeded a predetermined threshold. In some embodiments, the method may further include disconnecting the distributed energy resource from the electrical grid in response to determining that the Thévenin impedance has exceeded the predetermined threshold.

Abstract: Illustrative embodiments of systems and methods for detecting and responding to islanding of distributed energy resources are disclosed. In at least one illustrative embodiment, a method may include measuring voltage and current at a connection point between a distributed energy resource and an electrical grid, determining a Thévenin impedance of the electrical grid based upon the voltage and current measurements, and determining whether the Thévenin impedance has exceeded a predetermined threshold. In some embodiments, the method may further include disconnecting the distributed energy resource from the electrical grid in response to determining that the Thévenin impedance has exceeded the predetermined threshold.

Abstract: A substation intelligence system (104) includes a substation computer (105) which is operatively connected to a plurality of field devices (102) through an input/output subsystem (204). Data indicative of the devices is stored in a substation database (208). Advanced monitoring and/or diagnostics (107) use information from the database to perform various monitoring and/or diagnostic functions.

Abstract: A substation intelligence system (104) includes a substation computer (105) which is operatively connected to a plurality of field devices (102) through an input/output subsystem (204). Data indicative of the devices is stored in a substation database (208). Advanced monitoring and/or diagnostics (107) use information from the database to perform various monitoring and/or diagnostic functions.

Abstract: Automatic management of demand for non-durables like electrical energy, gas, thermal energy and fresh water is provided by a two-way communication network between a Multi Utility provider (20) and many respective End-users (5). Specialized electronic boxes (27, 28) at the End-users' premises receive broadcast dowlink signals from the Multi Utility provider (20), initiate metering action and transmit to the Multi Utility Provider uplink return signals containing instant or semi-instant non-durables consumption values, thereby collectively influencing the Multi Utility provider's pricing of non-durables.

Abstract: The invention concerns a system, a method, and a computer program product for load management in an electrical power generation, transmission and distribution network. A device arranged at a load point comprises means for a procedure call that may be remotely invoked in order to switch on or off a part load of an end user for the purpose of load demand management. The invention enables load to be reduced incrementally and restored quickly and automatically. The invention is carried out in part by a computer program product. The invention advantageously uses web technology to provide a power network with automated load management in an economic way. In a power network, the invention spreads the load shaving more evenly over a wide geographical area, as opposed to the traditional method of “rotating blackouts.

Abstract: As a variation of the non-orthogonal filter, a phasor estimate is computed by using an N-point window. An aspect of the sub-window cosine filter is to repeat the basic cosine filter for only selected points of the window. In the end, a least-squares fit is used to obtain an estimate for the phasors components. Previous cosine techniques use a data window whose length is greater than 1 cycle while the present invention requires only 1 cycle.

Abstract: A method employed in a condition monitoring unit (CMU) for monitoring a circuit breaker or interrupter to obtain a substantially undistorted version of a waveform suffering from saturation distortion comprises employing a current transformer (CT) to measure a current waveform. The output of the CT is prone to be a partially distorted waveform. The invention is generic in the sense that it does not require parameters associated with the CT characteristics or with the burden impedance on the secondary side of the CT. A digital representation of the partially distorted waveform is obtained, and then undistorted portions of the partially distorted waveform are identified by comparing the amplitude of the partially distorted waveform within a sliding window to a pair of boundary values and identifying as undistorted those portions having an amplitude between the boundary values. Next, distorted portions of the waveform are separated from the undistorted portions, thereby yielding a data record with holes.