Dear all,
I have designed a multilevel inverter which produces either 9 level or 13 level output in the form of a staircase. There are four and six angles for the two cases, respectively. I want to calculate the switching angles using Newton Raphson method. I have the m.file code in Matlab, however, the results do not converge because the initial values are taken randomly. In NR method, a judicious choice of the initial values is required to converge quickly to the optimized angles. Can you please show me how these initial values are chosen? Is there research papers which have addressed this issue?
Thank you very much
Dear Wail Ali Ali Saleh
I hope these articles will help you to find your answer.
https://ieeexplore.ieee.org/document/8573408
Conference Paper Optimized harmonic elimination for cascaded multilevel inverter
Regards
Hi
Please check the following work. It describes the process in details. I believe it will help you.
https://www.researchgate.net/figure/Switching-angles-v-s-number-of-iterations-for-different-with-same-initial-guess-The_fig3_284662982
Regards
Thank you Shikder Shafiul Bashar
I have read the above-mentioned references, I used the given formula to calculate the initial values for four switching angles,however, I did not get clear results. The results are shown in the JPG attached.
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