Electric power quality indicator device and method
First Claim
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1. A power quality indicator for monitoring a power bus including a plurality of electrical characteristics, the power quality indicator comprising:
- a plurality of detectors, each of the detectors being structured to detect an electrical characteristic of the electrical characteristics and to output a component value of a plurality of component values for each interval of a repeating interval of time, each of the component values being structured to indicate a power quality event occurring during a corresponding interval of the repeating interval of time;
a data selector structured to receive the component values for each interval and to multiply each component value of the component values for each interval with a corresponding weighting factor of a plurality of weighting factors to provide a corresponding weighted value of a plurality of weighted values for each interval, and further structured to select one of the weighted values having the largest magnitude of all of the weighted values for each interval; and
a display structured to output an indication of the one of the weighted values selected by the data selector within a first period of time ending with the most recent interval of the repeating interval of time.
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Abstract
A system and method of indicating power quality in an electric power system that generates an indication of power quality reflective of the worst observed power quality event over both a short and a long interval of time in which each component of the indicator is weighted by a user programmable factor to control its relative influence.
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Citations
20 Claims
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1. A power quality indicator for monitoring a power bus including a plurality of electrical characteristics, the power quality indicator comprising:
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a plurality of detectors, each of the detectors being structured to detect an electrical characteristic of the electrical characteristics and to output a component value of a plurality of component values for each interval of a repeating interval of time, each of the component values being structured to indicate a power quality event occurring during a corresponding interval of the repeating interval of time; a data selector structured to receive the component values for each interval and to multiply each component value of the component values for each interval with a corresponding weighting factor of a plurality of weighting factors to provide a corresponding weighted value of a plurality of weighted values for each interval, and further structured to select one of the weighted values having the largest magnitude of all of the weighted values for each interval; and a display structured to output an indication of the one of the weighted values selected by the data selector within a first period of time ending with the most recent interval of the repeating interval of time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of indicating power quality of a power bus including a plurality of electrical characteristics with a plurality of detectors, each detector detecting an electrical characteristic of the electrical characteristics and outputting a component value of a plurality of component values for each interval of a repeating interval of time, each of the component values being structured to indicate a power quality event occurring during a corresponding interval of the repeating interval of time, the method comprising:
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receiving the component values for each interval; multiplying each component value of the component values for each interval with a corresponding weighting factor of a plurality of weighting factors to provide a corresponding weighted value of a plurality of weighted values for each interval; selecting one of the weighted values having the largest magnitude of all of the weighted values for each interval; and outputting an indication of the one of the weighted values selected within a first period of time ending with the most recent interval of the repeating interval of time. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification