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ADE7880 3 phase 3-wired(Delta mode) How to calculate ITHD,VTHD value

Question asked by bartowski on Apr 13, 2018
Latest reply on May 21, 2018 by Gary.Kang.AnalogDevices



I use ADE7880 to analyze total harmonic distortion(THD) in 3 phae 3-wired(Delta connection)


It's OK in ITHD each phase,the value is what I expect


But the value of VTHD is unexpected(each phase), VTHD value is totally different from testing condition


I try to use THD original define to calculate(use XVRMS and FVRMS),but the value is still wrong


Would anyone has this issue too? hope to share how to solve thank you~