Search

This paper proposes a new high gain dc-dc converter. The proposed topology has simple control and structure. The input and output (load) current waveforms are continuous. The continuous character of input current of suggested converter candidates it as a suitable choice for application in renewable energy industry, where the Maximum Power Point Tracking (MPPT) can easily be achieved. Usually the transformerless converters suffer from low gain, but the suggested converter has extra high gain, in spite of its non-isolated and non-coupled inductor nature. The gain per number of elements in proposed topology is more than other similar topologies. Despite the high gain, the Normalized Voltage Stress (NVS) on switches/diodes of proposed topology is considerably low. In this paper, the proposed topology has been introduced and its operational modes have been explained. The steady state analysis have also been presented. To assess the proposed topology, it has been contrasted with similar novel topologies. Comparison results validate the advantages of proposed topology. The obtained simulation results (done in PSCAD/EMTDC) confirm the effective operation of proposed topology.

A new step-up Cascaded Multi-Level Inverter (CMLI) has been proposed in this paper. The proposed basic 35-level topology is composed of 4 DC sources, 2 capacitors, 2 diodes and 12 switches. The sum of input DC sources is 10V dc , where the peak output voltage is 17V dc . So, the proposed basic topology can act a step-up inverter with the gain of about 1.7. The proposed basic topology has simple structure. Since the voltage balancing of capacitors are done naturally, the control of proposed topology is also simple. The number of levels per number of components (such as DC sources, switches, gate driver circuits, diodes and capacitors) in proposed basic topology is higher than other similar converters. In this paper, the proposed basic topology has been introduced and its operational principles have been presented. Then, it has been compared with recently presented novel structures. The comparison results validate the advantages of proposed basic topology. Then, the proposed basic topology has been extended to act as a Multi-Level inverter. Finally, the appropriate performance of proposed basic topology has been verified by simulation results, extracted from PSCAD/EMTDC software.