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Analog Devices’ Energy Measurement ADCs

Analog Devices’ Energy Measurement ADCs. Victor Kolesnichenko 08/12/2014. Some of the ADCs for Energy Measurements. Some Specifics of Power/Energy Measurements. Real power , P , or active power : [1] watt (W) Reactive power , Q : volt-ampere reactive ( var )

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Analog Devices’ Energy Measurement ADCs

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  1. Analog Devices’ Energy Measurement ADCs Victor Kolesnichenko 08/12/2014

  2. Some of the ADCs for Energy Measurements

  3. Some Specifics of Power/Energy Measurements • Real power, P, or active power:[1]watt (W) • Reactive power, Q: volt-ampere reactive (var) • Complex power, S: volt-ampere (VA) • Apparent power, |S|: the magnitude of complex power S: volt-ampere (VA) • Phase of voltage relative to current, φ Q Sa Qa φ P Pa

  4. Measured vs. Calculated • Voltage - v(t) • Current - i(t) • Power - p(t) • Voltage RMS – Vrms • Current RMS – Irms • Apparent Power – |S| = Vrms * Irms • Real (Active) Power – P = |S| * cos(φ) • Reactive Power - Q= |S| * sin(φ) • Complex Power S= P + jQ

  5. Wiring Configurations for Residential and Commercial/Industrial Customers Q Qa 120 Sa P

  6. Wiring Configurations for Residential and Commercial/Industrial Customers L1 A N 120deg N B C L2 |Van|=|Vbn|=|Vcn| V1n=Vn2 |Vab|=|Van|*√3

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