High-pass filter for enhancing the resolution of AC power line harmonic measurements
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United States of America Patent
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Sep 13, 1994
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N/A
app pub date -
Sep 22, 1992
filing date -
Sep 22, 1992
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Abstract
An instrument employs a high-pass filter and an associated amplifier to reduce the number of Analog-to-Digital-Converter bits required to determine the amplitude of harmonics contained in digitally sampled AC (alternating current) power system voltage or current waveforms. The instrument is coupled to a power system having a line conductor and a neutral conductor for obtaining time-domain representations of the current flowing in the line conductor and the voltage difference between the line conductor and the neutral conductor. The time-domain representations are converted to frequency-domain representations by a single-chip microprocessor.
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