Sep 02, 2015 - 03:03 AM
A full bridge MMC can be used as STATCOM under DC fault. The DC side of MMC should be isolated from the DC fault. The reactive power demand should be set. The PI controller should be freezed for the other kinds of controllers. The DC voltage of each modules should be controlled so as to store the energy in the dc capacitor to supply reactive power. This way it can support the AC grid even dc side is faulted.