For the impacted converter station, these faults may result in non-zero crossing currents on the connected AC grid and cause significant overvoltage on upper arm submodule (SM) capacitors. This ...

However, the filter bank design relaxes the Nyquist criterion for zero intersymbol interference ... a simple neural network (NN)-based detector that enables joint detection of filter indices and ...

From there, zero-crossing detection is added to limit inrush surge currents, and the final design uses the venerable 555 timer to build a switching power supply. Although it is noted several times ...