ADE9000 THD

Hi swoods,

  What is the frequency of your input signal? Have you configured ACCMODE register? Please calculate THD with another equation in ADE9000 user guide 1098, which uses total rms and fundamental rms. Check the calculated value either. Thank you very much.

Best regards,

Gary

Thanks, It seems to be working now.  I found two issues,  the ACCMODE register was not set at 60Hz, the note in the ADE9000API.h said "/*60Hz operation, 3P4W Wye configuration, signed accumulation*/"  but the bits were set for 50 Hz when I checked the manual.  After setting to 60Hz, it still didn't give me correct THD or Fundamental values.

In the Fundamental Measurements section of the ADE9000 guide 1098 there is a sentence "The SELFREQ must be made prior to writing the RUN register to 1."  So after loading the default configuration in the ADE9000API, I set the RUN to 0, changed the ACCMODE to 0x0100 (60 Hz) then set RUN back to 1. 

The Fundamental voltage matched the RMS voltage and VTHD is giving me values that look correct for an office outlet.

Thanks

Hi swoods

i am not getting actual power register values, can you post your arduino sketch?  

Hi swoods,

  You are right, you need to configure some registers before RUN set. That's the order how the chip works. Thank you for your patient.

Best regards,

Gary

Hi swoods,

  You are right, you need to configure some registers before RUN set. That's the order how the chip works. Thank you for your patient.

Best regards,

Gary