PUBLICATIONS

  This paper proposes a control method for grid-connected inverter systems under unbalanced and distorted grid voltage. The

  proposed method can reduce the power ripple caused by the unbalanced condition as well as it can compensate the low-order

  harmonics of the output currents due to the distortion of grid voltage. To reduce the power ripple, the proposed method replaces

  the four conventional PI controllers with two PR controllers in the stationary frame. PR controllers can implement the compensation

  of selective harmonic without excessive computational requirements; the use of these controllers simplifies the method. The

  simulation results agree well with the theoretical analysis.