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OK, I can't be bothered to look through all that. It's not very clearly writtenHowever I note that you make reference to the "true RMS" reading Fluke 87 meter.It's only specified as true RMS for crest factors up to 6 and I think, from looking at the waveforms in the screenshots, that you are exceding that by a considerable margin.Please ask the people who did the work to confirm that the equipment was suitable for the measurements; in particular please calculate the crest factors (at least roughly) for the quantities measured with that meter.
If you really are interested you may want to check out energetic forum on renewable energies. There's a thread there that details the experimentalists' findings and some detailed waveforms that may also be of interest.