Fault Ride Through Requirements: Defuzzifier

This article is the Fault Ride Through Requirements continuation:

Per instance considering the Fuzzifier presented above article, if the?Duty Cycle is around 0.2, it has two different membership values?a?and?b.

Therefore defuzzifier will deduce one unique value and provide the output of the controller.

There are few method to obtain the solution:

? Center of Sums Method (COS)

? Center of gravity (COG) / Centroid of Area (COA) Method

? Center of Area / Bisector of Area Method (BOA)

? Weighted Average Method

? Maxima Methods

o First of Maxima Method (FOM)

o Last of Maxima Method (LOM)

o Mean of Maxima Method (MOM)

Let us consider the Centroid Method

This method will find the Fuzzy controller output an unique solution value between a and b. The final solution will be reached after few interaction, the fuzzy controller has not time constant per se, so controller will keep the current in the desired value after few iteration. This depend exclusively on the processor time to execute the Fuzzyfier-Defuzzyfier algorithm. The PCU controller will be a snickerdoodle form crowdsupply.

https://www.crowdsupply.com/krtkl/snickerdoodle

Conclusion

This approach will be tested on the Grid Emulator and a PCU with SiC Mosfet:

results will be shared soon.