Performance Analysis Of Parallel Inverter Based On Virtual Oscillator Control

In this paper, by improving the control strategy of virtual oscillator, a non-linear model for stability analysis is established, and a solution to the circulation problem in parallel system is proposed. The external equivalent of the virtual oscillator is the RLC resonant circuit. In this paper, through digital programming, the module is established with dual characteristics of controllable current source and controllable resistor, in which non-linear control is introduced. Through the phase-locked loop to feedback the phase change of the current and voltage in the line, it eliminates the circulating current brought by the parallel operation of the inverters. In this paper, Simulink simulation is used to control the parallel operation of two inverters with the same capacity and without interconnecting multiple lines. By conducting an experiment of voltage and current stability in the case of load-mutation, and conducting an experiment of circulating current suppression in the line with inductance is carried out to verify the feasibility of the system plan.