Is modulation index of 0.99 justifiable (SPWM) for three phase grid tied inverter If Operating frequency is 50KHz and SiC mosfets are used?

06 May 2020 0 7K Report

Specifications:

Grid Voltage 415 V(L-L)

Operating Frequency- 50 KHz

DC Bus- 600V to 1000V

pf=1

For Three phase grid connected inverter, and minimum DC bus voltage of 600V (from PV panel), modulation index is coming to be 1.12( L-L grid voltage is 415 V). However by injecting third harmonic, modulation index is coming around 0.98 (theoretical).

So my questions are:

Is this value of m justifiable for switching frequency of 50 KHz? If yes why? if no why not?
Should I go to SVPWM for over-modulation techniques (because in reality m can go beyond 1)?

What other options I can try out?
I would really appreciate If anyone can suggest me some publication with similar problem .

Thanking in anticipation.

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