Systems and methods for classifying power line events
First Claim
1. A computer implemented method for classifying a power line event on a power transmission or distribution system, the method comprising:
- measuring, by an Intelligent Electronic Device (IED) connected to a power line of the power transmission or distribution system, first, second and third signals on the power line associated with first, second and third phases of a three phase system, respectively;
sending, by the IED, measured data corresponding to the first, second and third signals measured on the power line to at least one computer processor of a substation of the power transmission or distribution system;
receiving from the at least one computer processor at least one probable classification for the power line event, wherein the at least one computer processor is configured to;
determine from the measured data that the power line event has occurred and been cleared;
estimate from the measured data an estimated residual fault data;
estimate, using the estimated residual fault data, one or more characteristics of one or more fault clearing devices of the power line that responded to the power line event;
apply a transformation to the measured data associated with the first, second and third phases to generate a single complex signal;
isolate from the measured data transient data corresponding to the power line event based on the single complex signal generated by the transformation;
calculate at least one event feature from the isolated transient data;
project the at least one event feature onto a lower dimensional component space to obtain a feature vector for the power line event; and
determine from the feature vector the at least one probable classification for the power line event.
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Accused Products
Abstract
Systems and methods for classifying power line events are disclosed. Classifying power line events may include receiving measured data corresponding to a signal measured on a power line, such as proximate a substation bus or along the power line, determining from the measured data that the power line event has occurred, extracting at least one event feature from the measured data, and determining at least partially from the at least one event feature at least one probable classification for the power line event. The systems may include an Intelligent Electronic Device (IED) connected to the power line and a processor linked to the IED.
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Citations
31 Claims
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1. A computer implemented method for classifying a power line event on a power transmission or distribution system, the method comprising:
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measuring, by an Intelligent Electronic Device (IED) connected to a power line of the power transmission or distribution system, first, second and third signals on the power line associated with first, second and third phases of a three phase system, respectively; sending, by the IED, measured data corresponding to the first, second and third signals measured on the power line to at least one computer processor of a substation of the power transmission or distribution system; receiving from the at least one computer processor at least one probable classification for the power line event, wherein the at least one computer processor is configured to; determine from the measured data that the power line event has occurred and been cleared; estimate from the measured data an estimated residual fault data; estimate, using the estimated residual fault data, one or more characteristics of one or more fault clearing devices of the power line that responded to the power line event; apply a transformation to the measured data associated with the first, second and third phases to generate a single complex signal; isolate from the measured data transient data corresponding to the power line event based on the single complex signal generated by the transformation; calculate at least one event feature from the isolated transient data; project the at least one event feature onto a lower dimensional component space to obtain a feature vector for the power line event; and determine from the feature vector the at least one probable classification for the power line event. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A system for classifying a power line event on a power transmission or distribution system, the system comprising:
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an Intelligent Electronic Device (IED) connected to a power line of the power transmission or distribution system and configured to measure first, second and third signals on the power line associated with first, second and third phases of a three phase system, respectively; one or more fault clearing devices of the power line configured to respond to the power line event on the power transmission or distribution system; and a substation of the power transmission or distribution system in electrical communication with the TED, the substation comprising a processor configured to execute instructions to perform a method, the instructions comprising instructions to; determine from the measured signals that the power line event has occurred and been cleared in at least one phase; estimate from the measured data an estimated fault data; estimate, using the estimated fault data, one or more characteristics of one or more fault clearing devices that responded to the power line event; apply a transformation to the measured first, second and third signals to generate a single complex signal; isolate from the measured signals a transient signal corresponding to the power line event based on the single complex signal generated by the transformation; calculate at least one event feature from the isolated transient signal; project the at least one event feature onto a lower dimensional component space to obtain a feature vector for the power line event; and determine from the feature vector at least one probable classification for the power line event. - View Dependent Claims (22, 23, 24, 25, 26)
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27. A system for classifying a power line event on a power transmission or distribution system, the system comprising:
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one or more fault clearing devices of a power line of the power transmission or distribution system, the one or more fault clearing devices configured to respond to the power line event; a non-transitory computer readable storage medium of a substation of the power transmission or distribution system having embodied thereon a plurality of machine-readable instructions that when executed by at least one computer processor of the substation of the power transmission or distribution system cause the at least one computer processor to classify a power line event, the plurality of machine-readable instructions comprising instructions to; measure first, second and third signals on the power line proximate a substation bus associated with first, second and third phases of a three phase system, respectively, wherein the first, second and third signals are measured by an Intelligent Electronic Device (IED) connected to the power line of the power transmission or distribution system and in electrical communication with the substation; receive measured data corresponding to the first, second and third phases measured on the power line proximate the substation bus; estimate from the measured data an estimated residual fault data; estimate, using the estimated residual fault data, one or more characteristics of one or more fault clearing devices that responded to the power line event; determine from the measured data that the power line event has occurred in at least one phase; apply a transformation to the measured data associated with the first, second and third phases to generate a single complex signal; isolate from the measured data transient data corresponding to the power line event based on the single complex signal generated by the transformation; calculate at least one event feature from the isolated transient data; project the at least one event feature onto a lower dimensional component space to obtain a feature vector for the power line event; and determine from the feature vector at least one probable classification for the power line event. - View Dependent Claims (28, 29, 30, 31)
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Specification