CPC based converter control for systems with non-ideal supply voltage

In recent years there have been many strategies proposed such as proportional plus resonant P-R controllers both in the stationary and in the synchronous reference frame that demonstrate grid-connected converter performance can be improved under non-ideal supply conditions such as supply asymmetry and supply voltage distortion. However, when employed in systems with high frequency variability such as micro-grids, the synchronization method required for operation in the synchronous reference frame or for dynamic retuning of the resonant controller may experience poor performance. A method is presented here based on CPC current decomposition that allows control of grid connected converters without direct supply synchronization and that is also suitable for operation under distorted and asymmetrical supply voltage conditions.