A Non-Isolated Multiple Input DC-DC converter with less TPIV for Photovoltaic Application

In this paper, an improved non-isolated multiple input boost dc-dc converter (MIBC) with an energy storage unit has been proposed. The topology can transfer energy from numerous energy sources to the load simultaneously or independently. The circuit architecture so designed that it has less total peak inverse voltage (TPIV) and less total current stress than a conventional converter. The topology is provided with an energy storage unit (battery), which realizes the bidirectional power flow operation for simultaneous absorption of excess energy generated by the input sources. The advantages of the proposed topology include the simple structure and reduced number of components (active/passive switches, inductors, capacitors, and current/voltage sensors). The proposed converter is investigated with different operational modes and design considerations. For gate pulse generation flip-flops are used which have the capability to operate for a wide range of duty ratios. For validation, the topology has been modeled and simulated in MATLAB/Simulink environment. The suitability of the proposed topology for photovoltaic applications has been validated with the obtained results.