Question

what is about harmonics indices?​

Answer 1

These values, or harmonic indices, serve as a useful metric of system performance. The two most frequently used are total harmonic distortion (THD) and total demand distortion (TDD). They are measures of the effective value of a waveform and can be applied to both current and voltage.

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Answer 2

Answer:

These values, or harmonic indices, serve as a useful metric of system performance. ... The two most frequently used are total harmonic distortion (THD) and total demand distortion (TDD). They are measures of the effective value of a waveform and can be applied to both current and voltage.

Explanation:

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