What is the impact of circulating current in parallel inverters network?

The most severe impact of the circulating current is at parallel inverters network due to line impedance mismatch. With ‘N’ number of inverters connected to the same PCC with different line impedances, there is an increase in the difference of circulating current flowing to each inverter.

Are circulating-current suppression methods suitable for parallel operation of three-phase voltage-source inverters?

Abstract: This paper presents a theoretical study with experimental validation of a circulating-current suppression method for parallel operation of three-phase voltage-source inverters (VSI), which may be suitable for modular parallel uninterruptible power supply systems or hybrid ac/dc microgrid applications.

What is the control strategy of grid-connected parallel interleaved converter?

A global control strategy of grid-connected parallel interleaved converter is proposed. The control strategy is based on the concept of Port Controlled Hamiltonian (PCH). Energy shaping control is used to reduce low frequency circulating currents and to control the power delivered to the grid.

How to control low frequency circulating currents in parallel interleaved converters?

Energy shaping control is used to reduce low frequency circulating currents and to control the power delivered to the grid. Feedback from phase currents are used to synthesize independent voltage references for each inverter. This paper proposes a method to control low frequency circulating currents generated in parallel interleaved converters.

Do parallel-connected inverters ovoid circulating currents?

In this paper, a novel simple and effective controller for parallel-connected inverters is proposed to ovoid the circulating currents among the inverters. Convergence efficiency and low computational cost of the suggested controller based on integral backstepping method are the primary motivations of this work.

Why do parallel-connected inverters lose power?

For parallel-connected operation, the most significant issue is that even a slight variation in the output voltages of particular inverters results flow of circulating currents. A high level of circulation current causes inverter power losses to increase, which lowers the system's overall performance by decreasing its efficiency.