Voltage Compensation in Weak Grids Using Distributed Generation with Voltage Source Converter as a Front End

In this paper, a three-phase voltage source converter (VSC) is implemented as a front end of a distributed generation (DG) unit. A voltage regulation feature has been added to the VSC controller in order to maintain the voltage at the load connection bus equal to the nominal voltage even in case of balanced or unbalanced voltage dips. In addition, the voltage regulation limits are calculated depending on the rating of the DG