Let's suppose I have a voltage of 60 Hz, containing distortion due to 3rd, 5th and 7th harmonics (180Hz, 300Hz and 420Hz).
Is it possible to phase shift the 3rd harmonic (for example) without shifting the rest of the signal ? If yes, how and using what ?
EDIT : Adding more information just like Sean Asked
i read this article : Harmonic interactions of multiple distributed energy resources in power distribution networks, ELSEVIER Journal
basically what they did, is taking under consideration the phases of the harmonics :
In a systems with multi harmonic sources, the injected harmonic current from each source add vectorally. Therefore, it is crucial to study the impact of each harmonic source phase angle on the total harmonic distortion.
Here is the network Model they used :
So a number of harmonic simulations were performed with the phase angles steps for both harmonic sources (1 & 2) being varied as follows: (0◦, 15◦, 30◦, 45◦, 60◦, 75◦, 90◦) to the : 3rd, 5th, 7th, 9th and 11th harmonics. the result of the THD according to each combination is in the following Graph :
Now, i saw that for some combination of Phases (ex :75° to Source 2 & 45° to Source 1) the THD is reduced because the harmonics canceled each other, without any harmonics mitigation technique, so i was wondering if it is possible to create an algorithm to compute the right combination of phases for N harmonics sources in a way they cancel each other and than apply those phases to each harmonics in each source, to obtain a minimum THD without any effort of mitigation. of course in the real life not all harmonics have the same phase, so the phase shifting must be different for each harmonics rank, and this is why i asked my question at the first place