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Harmonic Problem on Electricity Meter

Other Parts Discussed in Thread: MSP430F47197

Hi!

I am using MSP430F47197 on my Three Phase electricity meter project. I get fine results if there is no harmonic on the system.

However , if I apply harmonic both of voltage and current, I get errors although my sampling frequency is greater than Nyquist frequency.

On upper harmonic contents error rises.

Why?

Thank you....

 

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