Analog Devices’ Energy Measurement ADCs

Victor Kolesnichenko08/12/2014

Some of the ADCs for Energy Measurements

Part # Device Primary Function Measurements Available

ADE7978 Metrology EngineApparent Power, Fundamental Active, Fundamental Reactive, Irms, Neutral Measurement, Total Active Power, Total Harmonic Distortion, Total Reactive Power, Vrms

ADE7816 Single Phase Apparent Power, Irms, Total Active Power, Total Reactive Power, VrmsADE7880 Polyphase Apparent Power, Fundamental Active, Fundamental Reactive, Irms, Neutral Measurement, Total Active Power, Total Harmonic Distortion, VrmsADE7953 Single Phase Apparent Power, Irms, Neutral Measurement, Total Active Power, Total Reactive Power, VrmsADE7854 Polyphase Apparent Power, Irms, Total Active Power, VrmsADE7858 Polyphase Apparent Power, Irms, Total Active Power, Total Reactive Power, VrmsADE7868 Polyphase Apparent Power, Irms, Neutral Measurement, Total Active Power, Total Harmonic Distortion, Total Reactive Power, VrmsADE7878 Polyphase Apparent Power, Fundamental Active, Fundamental Reactive, Irms, Neutral Measurement, Total Active Power, Total Reactive Power, VrmsADE5569 Single Phase Apparent Power, Irms, Total Active Power, Total Reactive Power, VrmsADE7518 Single Phase Apparent Power, Irms, Total Active Power, Total Reactive Power, VrmsADE5169 Single Phase Apparent Power, Irms, Neutral Measurement, Total Active Power, Total Reactive Power, VrmsADE7116 Single Phase Apparent Power, Irms, Neutral Measurement, Total Active Power, VrmsADE7156 Single Phase Apparent Power, Irms, Neutral Measurement, Total Active Power, VrmsADE7166 Single Phase Apparent Power, Irms, Neutral Measurement, Total Active Power, VrmsADE7169 Single Phase Apparent Power, Irms, Neutral Measurement, Total Active Power, Total Reactive Power, VrmsADE7569 Single Phase Apparent Power, Irms, Total Active Power, Total Reactive Power, VrmsADE7566 Single Phase Apparent Power, Irms, Total Active Power, VrmsADE7763 Single Phase Apparent Power, Irms, Total Active Power, VrmsADE7758 Polyphase Apparent Power, Irms, Total Active Power, Total Reactive Power, VrmsADE7753 Single Phase Apparent Power, Irms, Total Active Power, Total Reactive Power, VrmsADE7754 Polyphase Apparent Power, Irms, Total Active Power, VrmsADE7759 Single Phase Total Active Power

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

φ

Q

P

Sa

Pa

Qa

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

Wiring Configurations for Residential and Commercial/Industrial Customers

120

Q

P

Sa

Qa

Wiring Configurations for Residential and Commercial/Industrial Customers

120deg

L1

L2

N

A

BC

N

|Van|=|Vbn|=|Vcn|

|Vab|=|Van|*√3 V1n=Vn2