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US 7,415,370 B2Granted
Method of compressing values of a monitored electrical power signal
AssigneeELSPEC Ltd.
InventorsPol Nisenblat, Amir Mordehay Broshi, Ofir Efrati
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Abstract
A method of compressing values of a waveform of a monitored electrical power signal. The method includes acquiring data representative of periods of the waveform, decomposing the waveform of the power signal into a plurality of components over a plurality of periods of the waveform, compressing the values of at least some of the components over a plurality of periods, and storing these values and extents.
Claims34
A method of compressing values of a waveform of a monitored electrical power signal, comprising:
- acquiring samples of a power signal over a plurality of periods of the waveform;
- dividing the samples into groups, each of said groups determined based on a number of cycles of the power signal included in said group;
- decomposing the waveform of the power signal into a plurality of frequency components, over said plurality of periods of the waveform;
- and
- compressing values of at least some of the frequency components over said plurality of periods, separately.
2 more elements
A method of storing a representation of a monitored electrical power signal, comprising:
- acquiring samples of the power signal;
- dividing the samples into groups, each of said groups determined based on a number of cycles of the power signal included in said group;
- transforming the samples of each group, into harmonic component values;
- and
- storing a representation of the harmonic component values on a non-volatile storage medium, continuously over at least a week.
2 more elements
Dependencies are inferred from the claim text.