Distributed generators (DGs) can be connected to loads in practical islanded microgrids (MGs) using a wide variety of feeder impedances. Mismatched line impedance and various nonlinear load limitations present challenges for the technology that is currently used for controlling distributed generators in microgrids with complex architectures. This study presents a method for generating harmonic virtual impedance as a response to the issues that have been described above. This method lowers the harmonic voltage at the point of common coupling (PCC)

which enables harmonic current sharing at the same time. The approach can be broken down into two distinct components. First

the constraints of harmonic current sharing are formulated according to the topology of the microgrid. Next

the optimal harmonic virtual impedance value is determined through the optimization algorithm

which initially reduces the harmonic voltage of the PCC. After that

the disruption of the PCC harmonic voltage is corrected by voltage compensation block

which leads to an even more significant improvement in the voltage quality. In conclusion

the applicability and efficiency of the method are demonstrated through the use of experimental works.