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Total Harmonic Distortion Measurement For Energy Monitoring Reference Design

Texas Instruments

The TIDM-THDREADING reference design implements power quality analysis in a three-phase energy measurement system. Power quality monitoring and analysis has an increasingly large role in improving the reliability of the electricity grid. The design measures Total Harmonic Distortion(THD): monitors voltage sags and swells: and measures phase-to-phase angles to help determine phase sequence and prevent accidental phase swapping. Four-quadrant energy measurement is supported for net metering systems with bi-directional energy flow.

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Features

THD calculated for voltage and currentVoltage sag and swell events logged with programmable threshold levelsPhase-to-phase angle measurementFour quadrant energy measurement with Class 0.2 accuracyComplete Energy Library with fundamental voltage and current: fundamental active and reactive power: active and reactive energy: Root Mean Square(RMS) current and voltage: power factor: and line frequency