Bi-directional multi-mode grid tied converter for solar energy conversion systems

The rapid growing interests in renewable energy, such as solar energy, outweigh the benefit of distributed grids in current grid networks. Innovative topologies for renewable energy conversion systems that integrate with electric grids and energy storage systems are being proposed, each with limited modes of operation for the various needs in smart grid applications. In this paper, we propose a modified version of a multi-source converter, which uses a small number of elements to accomplish each task of multi-mode operation in a smart-grid. The proposed approach is verified by simulations in MATLAB. We found that by introducing an additional switch in the converter's output allows the reverse flow of current, enabling current to charge a battery from the grid while maintaining the integrity of the former modes of operation.