Protective device with metering and oscillography
AssigneeSchweitzer Engineering Laboratories, Inc.
InventorEdmund O. Schweitzer, III
Life of this patent
Estimating the term…
Abstract
A device, such as an intelligent electronic device (IED), provides a monitoring and protective function for a power system. The protective function uses stimulus acquired from the power system to detect power system conditions and to take one or more protective actions responsive thereto. The device may detect arc flash events in the power system based upon electro-optical and/or current stimulus measurements obtained therefrom. The stimulus measurements may be recorded to use in metering, validation, identifying detector misoperation, and/or event oscillography.
Claims26
An intelligent electronic device (IED) configured to provide a protective function to a power system, comprising:
- a first input configured to receive measurements of a first stimulus type from the power system;
- a second input configured to receive measurements of electro-optical (EO) radiation from the power system;
- a conversion element configured to determine quantized analog measurements corresponding to the measurements received via the first and the second inputs;
- a computer-readable storage medium configured to store the quantized analog measurements;
- and
- a data output configured to export the quantized analog measurements from the computer-readable storage medium.
A method for protecting a power system, comprising:
- receiving measurements from the power system, the measurements comprising measurements of a first type of stimulus acquired by a first detector and measurements of electro-optical (EO) radiation collected by an EO radiation detector;
- converting the received measurements into quantized analog measurements comprising quantized analog measurements of the first type of stimulus and quantized analog EO radiation measurements;
- recording the quantized analog measurements on a computer-readable storage medium;
- providing a protective function using the measurements of the first type of stimulus and the measurements of the EO radiation;
- and
- exporting a portion of the quantized analog measurements.
A computer-readable storage medium comprising instructions, which, if executed by an intelligent electronic device (IED), cause the IED to perform a method for protecting a power system, the method comprising:
- receiving stimulus measurements from a power system, the stimulus measurements comprising current stimulus measurements and electro-optical (EO) radiation measurements;
- converting the stimulus measurements into quantized analog measurements comprising quantized analog current measurements and quantized analog EO radiation measurements;
- time stamping the quantized analog measurements;
- recording the time-stamped, quantized analog measurements on a computer-readable storage medium;
- providing a protective function using the quantized analog measurements;
- and
- providing for displaying a sequence of quantized analog measurements on a display device.
Dependencies are inferred from the claim text.