Briefly, embodiments are directed to a system, method, and article for identifying power system event signatures. Input measurement data may be received from one or more data sources relating to a power grid system. The input measurement data may comprise normal system operation measurement data and power system event measurement data. A processor may perform operations during an online application phase. During the online application phase, a feature matrix may be generated for the power system event measurement data and the at least one trained auto-associative model. The feature matrix for the power system event measurement data may be processed to determine power system event residuals. Also during the online application phase, the power system event signatures may be identified based on residual statistics for normal system operation measurement data residuals and on the power system event residuals.

A system of sensors associated with a branched conductor of an AC power line using the conductor as the communication medium between different sensors. The communication is carried out at frequencies higher than the powerline frequency. At least one sensor is provided in every branch in the vicinity of every branching point of the conductor. Synchronous measurements are carried out of the root mean square current passing through every branch of the conductor and the direction of energy flow in the branch. Results of the measurements are regularly reported throughout the system. An arrangement is provided for analyzing the results of the measurements to determine the graph topology of the branched conductor and ascertain the distribution of the root mean square current passing through every branch of the graph.

Systems and methods are provided for compensating for parasitics in current measurements utilizing series current sense resistors. In one or more embodiments, the techniques include connecting a probe to a terminal of a circuit and a waveform measuring device. A waveform measuring device then acquires, through the probe, a voltage waveform. A virtual probe netlist is generated, where the netlist is descriptive of a series resistance and associated parasitics. A virtual probe processor converts, based on the virtual probe netlist, the voltage waveform to a current waveform representative of a current in the circuit.

Embodiments of the present invention may provide a device for monitoring electric power at the distribution level. The device may include an analog-to-digital converter (ADC) to convert an input signal into digital samples at time intervals, a receiver to generate a pulse-per-second (PPS) signal, an oscillator to generate an oscillator signal, and a data processor coupled to the ADC, the receiver, and the oscillator. The data processor may include a counter to measure an oscillator frequency of the oscillator signal at each pulse of the PPS signal, an adjuster to adjust a timer period register value, and a timer to adjust the time intervals based on the adjusted timer period register value. Based on the digital samples, the data processor may generate a plurality of metrics, which may include one or more measurements of frequency, magnitude, phase, harmonic level, signal-to-noise ratio, sag, and swell of the input signal.

A wire tracing system includes a voltage output source having a director circuit with a plurality of output channels. Each of the output channels outputs a unique voltage signature. A voltage reader/data recorder includes a conductive probe and a data memory that is partitioned into a plurality of data bins. Each of the data bins in the voltage reader/data recorder is associated with one of the voltage signatures output via the output channels of the director circuit, and each of the data bins is configured to store information associated with each of a plurality of wires to which the output channels are respectively connectable. The system and method permit a single individual to rapidly discover the identities of individual wires and cables without having to repeatedly travel back and forth between those extremities.

The disclosure relates to a measuring device for measuring a physical variable. The measuring device has a converter, which is designed to convert an input variable present at a measurement input, into a measurement signal and to provide the same as an output variable. The measuring device comprises a processing unit, which is configured to process the output variable of the converter, and a signal generator, which is designed to generate a test signal on the basis of a specification which test signal corresponds to an output variable of the converter to an input variable of the converter corresponding to the specification. The processing unit can be connected via a switching element either to an output of the converter or to an output of the signal generator. The disclosure further relates to a method for testing a measuring device.

The present disclosure relates to a system for automatically identifying product information, including a lamp information collection module, a controller, and a user terminal. The controller has a built-in comparison table setting different power information intervals for different lamp categories, and sends to-be-collected power information to the lamp information collection module. The lamp information collection module is used to collect corresponding power information according to the received to-be-collected power information and send the collected power information to the controller. The controller is further used to determine a category of a lamp according to the collected power information corresponding to the lamp and the power information interval comparison table, and send information of the lamp to the user terminal. The user terminal includes a human-machine interface and is used to display the information of the lamp on the human-machine interface.

A method of detecting the presence of a hazardous foreign voltage on a conductor includes the steps of sensing an electric field in the vicinity of the conductor with a first non-contact conductive sensor and sensing the electric field in the vicinity of the conductor with a second non-contact conductive sensor spaced a predetermined distance from the first non-contact conductive sensor. The difference between the electric field sensed by the first conductive sensor and the electric field sensed by the second conductive sensor is determined. The first conductive sensor preferably is shaped as a truncated spheroid. If the difference is less than a predetermined threshold, the sensed electric field is ignored as being induced by a distant source. If the difference is greater than a predetermined threshold, the electric field sensed by the first and second conductive sensors is considered to be indicative of the presence of a foreign voltage on the conductor. In that event, at least one alarm is activated as an alert to the presence of a foreign voltage on the conductor.

A method of detecting the presence of a hazardous foreign voltage on a conductor includes the steps of sensing an electric field in the vicinity of the conductor with a first non-contact conductive sensor and sensing the electric field in the vicinity of the conductor with a second non-contact conductive sensor spaced a predetermined distance from the first non-contact conductive sensor. The difference between the electric field sensed by the first conductive sensor and the electric field sensed by the second conductive sensor is determined. The first conductive sensor preferably is shaped as a truncated spheroid. If the difference is less than a predetermined threshold, the sensed electric field is ignored as being induced by a distant source. If the difference is greater than a predetermined threshold, the electric field sensed by the first and second conductive sensors is considered to be indicative of the presence of a foreign voltage on the conductor. In that event, at least one alarm is activated as an alert to the presence of a foreign voltage on the conductor.

A measuring device providing a display device. The operation of the measuring device can be adapted by a user. In this context, operation includes the input and output of parameters in dialogs and the switching between dialogs. The display device displays the dialogs and can display several dialogs simultaneously. The input of given values in given dialogs effects the opening and/or closing of at least one respectively associated further dialog. The content and/or the position and/or the form and/or the linking of the dialogs are adapted. The operation of the measuring device is functional during the adaptation. Exclusively the currently-displayed dialogs are adaptable.