TRANSIENT DETECTOR AND FAULT CLASSIFIER FOR A POWER DISTRIBUTION SYSTEM
First Claim
1. In an electrical power distribution system, a method for detecting the occurrence of a fault comprising:
- monitoring waveforms on the distribution system;
sampling the current of the waveforms and processing the samples obtained to detect any anomalies which may indicate a fault has occurred within the distribution system; and
,classifying samples meeting pre-established criteria indicative of a fault to then classify the result of a sampling as representing a likely fault occurrence or some other type of anomaly which is likely not a fault occurrence.
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Abstract
Detection of fault occurrences within a power distribution system. A transient detector and fault classification system (10) implements an algorithm that detects transients which may result from the occurrence of a fault in the power distribution system. The system includes a detection module (18) which processes a set samples obtained from electrical waveforms propagated of through the power distribution system and appear to be statistically anomalous compared to other sample data. This is done using an adaptive detection algorithm that is applied when large changes occur in a waveform over a relatively short period of time. The identified samples are then provided to a signal classifier module (20) which processes sets of samples to classify a transient they represent as a likely fault occurrence or some other type of anomaly which is likely not a fault occurrence. If a transient is classified as representing a likely fault occurrence, a polling module (30) polls users of the distribution system to determine if a fault has occurred within the distribution system, and, if so, where.
43 Citations
22 Claims
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1. In an electrical power distribution system, a method for detecting the occurrence of a fault comprising:
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monitoring waveforms on the distribution system; sampling the current of the waveforms and processing the samples obtained to detect any anomalies which may indicate a fault has occurred within the distribution system; and
,classifying samples meeting pre-established criteria indicative of a fault to then classify the result of a sampling as representing a likely fault occurrence or some other type of anomaly which is likely not a fault occurrence. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A transient detector and classification system for analyzing transients occurring in waveforms propagated through a power distribution system to determine if a transient is indicative of a fault somewhere in the system that may result in a power outage comprising:
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a detection means monitoring the waveforms and obtaining continuous samples of the waveforms; processor means processing the samples to determine if a transient occurred that may represent the signature of a fault occurrence; and
,a classifier evaluating a set of samples representing the transient in accordance with predetermined criteria to classify the transient as representing a likely fault occurrence or some other type of anomaly which is likely not a fault occurrence. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A transient detector and classification system for analyzing transients occurring in waveforms propagated through a power distribution system comprising:
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a detector means monitoring waveforms for each feeder phase of the power distribution system, at a distribution substation of the system, and obtaining samples of transients appearing within the waveforms to produce a set of samples of a transient; and
,a signal classifier evaluating each set of samples to classify a transient as one resulting from normal occurrences within the distribution system or one resulting from an anomaly occurring within the distribution system, the classifier performing its classification based upon preselected features exhibited by the samples contained within the set of samples, and the utility performing an action based upon the result of the classification if the classification indicates the transient resulted from an anomalous occurrence. - View Dependent Claims (21, 22)
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Specification