Systems and methods for detecting and identifying arcing
AssigneeHubbell Incorporated
InventorGary Michael MILLER
Life of this patent
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Abstract
Systems and methods for detecting and identifying arcing are disclosed. A method of detecting arcing includes obtaining data indicative of voltage and data indicative of current, determining a waveform of a cycle of a primary load current according to the data indicative of current, determining at least one noise signal according to the determined waveform of a cycle of the primary load current and the data indicative of current, determining a probability density of the noise signal according to a time window, and comparing the probability density of the noise signal with at least one model probability density.
Claims20
A method for detecting and identifying arcing comprising:
- converting a current from a load to a proportional voltage;
- converting the current to a digitized current at a sample frequency;
- converting the proportional voltage to a digitized voltage at the sample frequency;
- determining a waveform of a cycle of a primary load current based on the digitized current;
- and
- determining at least one noise signal according to the determined waveform of the cycle of the primary load current and the digitized current;
- setting a time window within a cycle of the digitized voltage by setting a start time and a stop time of a time interval based on voltage amplitude at the start time and the stop time being within a predetermined value of the peak voltage of the waveform of the cycle of the digitized voltage;
- determining a probability density of the at least one noise signal according to the set time window;
- comparing the probability density of the at least one noise signal with at least one model probability density;
- and
- generating an output indicative of a positive arc detection based on the comparing when the time window is set based on values of the digitized voltage indicative of the arc.
A method for determining a model probability density for detecting and identifying arcing comprising:
- measuring a current in a conductor when inducing arcing in the conductor;
- converting the current to a proportional voltage;
- converting the current to a digitized current at a sample frequency;
- converting the proportional voltage to a digitized voltage at the sample frequency;
- determining a waveform of a cycle of a primary load current according to the digitized current;
- determining at least one noise signal according to the determined waveform of the cycle of the primary load current and the digitized current;
- setting a time window within a cycle of the digitized voltage by setting a start time and a stop time of a time interval based on voltage amplitude at the start time and the stop time being within a predetermined value of the peak voltage of the waveform of the cycle of the digitized voltage;
- determining a probability density of the at least one noise signal according to the time window;
- determining a model probability density at a voltage magnitude;
- and
- storing data indicative of the model probability density at the voltage magnitude in a non-transitory computer-readable medium as a reference for a positive arc detection at the voltage magnitude.
Dependencies are inferred from the claim text.