Proportional load sharing method for parallel connected inverters

In this paper, a control technique is proposed for parallel connected inverters to share linear and nonlinear loads in proportional to their capacities. Using locally measurable feedback voltages and currents without an external communication mechanism, this technique considerably reduces the sharing error of reactive power, output voltage drop and output voltage distortion, which are inherent drawbacks in the conventional control method. Simulation results are presented to verify the proposed technique.