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ADE7880 - Problems with reactive energy when occurs frequency variation

Question asked by carlos.affonso on Nov 8, 2016
Latest reply on Nov 16, 2016 by carlos.affonso

We are making some tests with our meter, and one of them is checking the accuracy on small frequency variations. We are using 60 Hz as main grid frequency, and testing with 58.8 Hz and 61.2 Hz. In that points we are getting the reactive error going to -33%. The active energy is OK.

 

Our internal ADE7880 registers are:

 

{ kAccmode, 0x00000080 }, //part one
    { kAfirmsos, 0 },
    { kAfvaros, 0 },
    { kAfvrmsos, 0 },
    { kAfwattos, 0 },
    { kAigain, 0 },
    { kAirmsos, 0 },
    { kAphcal, 0x00000005 },
    { kApgain, 0x0ff7e1b2 },
    { kApnoload, 0 },
    { kAvgain, 0 },
    { kAvrmsos, 0 },
    { kAwattos, 0 },
    { kBfirmsos, 0 },
    { kBfvaros, 0 },
    { kBfvrmsos, 0 },
    { kBfwattos, 0 },
    { kBigain, 0 },
    { kBirmsos, 0 },
    { kBphcal, 0x00000007 },
  { kBpgain, 0x0ff7e1b2 },
    { kBvgain, 0 },
    { kBvrmsos, 0 },
    { kBwattos, 0 },
  { kCf1den, 0x00000139 },
    { kCf2den, 0x00000139 },
    { kCf3den, 0x00000139 },
  { kCfcyc, 0x00000001 },
    { kCfirmsos, 0 },
  { kCfmode, 0x000000A0 }, //part two
  { kCfvaros, 0 },
    { kCfvrmsos, 0 },
    { kCfwattos, 0 },
    { kCigain, 0 },
    { kCirmsos, 0 },
    { kCompmode, 0x000041FF },
    { kConfig, 0 },
    { kConfig2, 0x00000002 },
    { kConfig3, 0x00000001 },
  { kCphcal, 0x00000002 },
    { kCpgain, 0x0ff7e1b2 },
    { kCvgain, 0 },
    { kCvrmsos, 0 },
  { kCwattos, 0 },
    { kDicoeff, 0x0FFF8000 },
    { kGain, 0 },
    { kHconfig, 0x00000008 },
  { kHpgain, 0 },
    { kHsdcCfg, 0 },
    { kHx, 0x0000003E },
    { kHxirmsos, 0 },
    { kHxvaros, 0 },
    { kHxvrmsos, 0 },
    { kHxwattos, 0 },
    { kHy, 0x0000003F },
    { kHyirmsos, 0 },
    { kHyvaros, 0 },
    { kHyvrmsos, 0 },
  { kHywattos, 0 }, //part three
  { kHz, 0x0000003D },
    { kHzirmsos, 0 },
    { kHzvaros, 0 },
    { kHzvrmsos, 0 },
    { kHzwattos, 0 },
    { kIsumlvl, 0 },
    { kLcycmode, 0x00000078 },
    { kLinecyc, 0x0000FFFF },
  { kLpoilvl, 0x00000007 },
    { kMask0, 0 },
    { kMask1, 0 },
    { kMmode, 0x0000001C },
    { kNigain, 0 },
  { kNirmsos, 0 },
    { kOilvl, 0x00FFFFFF },
    { kOvlvl, 0x00FFFFFF },
    { kPeakcyc, 0 },
    { kRun, 0 },
    { kSagcyc, 0 },
    { kSaglvl, 0 },
    { kVanoload, 0 },
    { kVarnoload, 0 },
    { kVarthr, 0x00000080 },
  { kVathr, 0x00000080 },
    { kVlevel, 0x00AD486B },
    { kVnom, 0x00143E66 },
    { kZxtout, 0x0000FFFF },
  { kWthr, 0x00000080 }

 

 

Any Ideas?

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