Disturbance Rejection Analysis of Grid-Connected VSCs Controlled in the Stationary Reference Frame Under Voltage Harmonic Disturbances

This paper has the objective of analyzing the effects of grid voltage harmonic disturbances in the operation of a grid-connected Voltage Source Converter (VSC) with current control in the stationary reference frame. A mathematical model is derived and validated through simulations in order to associate the voltage harmonic magnitude disturbance with the respective current harmonic magnitude response from the grid-connected VSC. The model is also utilized to tune paralleled resonant controllers to mitigate the effect.