Power quality monitoring
AssigneeELSPEC Ltd.
InventorsPol Nisenblat, Amir 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 of acquiring data representative of periods of the waveform (202), decomposing the waveform of the power signal into a plurality of components, over a plurality of periods of the waveform (sequence steps 204, 206, 208, 210, 212, 214) compressing the values of at least some of the components over a plurality of periods (216), individually. And storing these values and extents (218).
Claims49
A method of compressing values of a waveform of a monitored electrical power signal, comprising:
- acquiring data representing periods of the waveform;
- decomposing the waveform of the power signal into a plurality of components, over a plurality of periods of the waveform;
- and
- compressing the values of at least some of the components over a plurality of periods, separately.
A method of compressing values of a monitored electrical power signal, comprising:
- acquiring samples of the power signal;
- dividing the samples into groups corresponding to cycles of the power signal;
- 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.
A device for monitoring electrical power signals, comprising:
- a power line interface for measuring power line signals;
- a non-volatile storage medium;
- and
- a processor adapted to store a representation of waveform information of measured power line signals on the storage medium continuously, regardless of whether a special event was identified.
A method of compressing values of a monitored electrical power signal, comprising:
- acquiring samples of the power signal;
- and
- compressing the samples of the power signal using a lossy compression method.
Dependencies are inferred from the claim text.