Online Impedance Estimation for Voltage Source Converters through the Discrete Fourier Transform

This work utilizes an impedance estimation methodology based in the discrete Fourier transform, expanding its use toward conventional applications associated with voltage source converters. Such applications include the integration of renewable energy resources with the grid, reactive power compensation and motor driving. Furthermore, the methodology utilized in this paper includes a control loop that does not require previous knowledge of the grid to enable the method. Simulation results are utilized to validate the study.