In islanded mode, the voltage and frequency of microgrids are determined by the interface voltage source inverters. Hence, the power quality can be deteriorated under unbalanced and nonlinear load conditions. This paper proposes a new method that combines Virtual Oscillator Control with Proportional-Resonant control to mitigate voltage harmonic distortion. This work proposes a modified nested loop proportional-resonant controller, in which the fundamental frequency unit is located in the outer loop, whereas the harmonic frequency units are used in the inner loop. The harmonic control units are introduced to reduce harmonics at the point-ofcommon-coupling and to guarantee non-fundamental power sharing among inverters. The proposed control structure eliminates the harmonics at selected frequencies, while retaining the main advantages of the virtual oscillator control method. Simulations in Matlab/Simulink verify the effectiveness of the proposed method.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.