Abstract
Power converter plays a significant role in Proton Exchange Membrane Fuel Cell (PEMFC) energy generation systems, which is an alternative of distributed energy generation systems. So there creates a demand for high-quality power conditioning used in PEMFC systems. This article proposes a converter topology as a power interface and also introduced a multilevel inverter topology for various levels of operation. The converter steps up the input voltage to the rated voltage and transforms to the DC bus, the multilevel inverter converts the voltage to AC and feeds to AC loads. In this article, we develop an entire unit stack, which can produce an output with positive and zero sequences. The addition of H-bridge to the fundamental unit known to be an advance cascaded H-bridge multilevel inverter resulting in the formation of all sequences like positive, zero and negative levels. The conventional multilevel inverters are compared with the proposed inverters in terms of switch count, DC sources, diodes, through which the lesser requirement of components in a multilevel inverter is possible to observe, which results in the reduction in cost, dv/dt stress, component space of the driver circuit. With this implementation, the better possibility of control, increase the quality of output, reliability of the inverter with a reduced THD, and stress. The converter output is tested and verified in MATLAB, and the respective results of the different levels like five, seven and fifteen of a single-phase cascaded inverter are tested experimentally and in MATLAB Simulink.
Highlights
The basic configuration of inverters is of two-level, where the many drawbacks exist like input voltage is twice than that of the output voltage resulting in the severe harmonic distortions, high switching losses & frequency
Multilevel inverters usually come in three forms [5], namely neutral clamping point (NPC), clamping diode (DCM) [6], flying capacitor (FLC) and cascaded H- (CHB) [7], [8]
COMPARISON STUDIES The symmetrical configuration of the presented MLI is compared with various levels like 5 level, 7 levels, 15 levels symmetrical configuration of the multilevel inverters such as Cascaded H-bridge (CHB), Flying capacitors (FC), Neutral point clamped (NPC) and the several topologies presented
Summary
The basic configuration of inverters is of two-level, where the many drawbacks exist like input voltage is twice than that of the output voltage resulting in the severe harmonic distortions, high switching losses & frequency. It restricts these to only low-power applications as the power handling capacity is less [1]. From solar panel and fuel cell stacks, it uses the energy generation for energy transformation to feed the AC loads using power electronic devices with DC-AC, DC-DC conversion It maintains the constant DC voltage at the DC bus by the step-up operation of the converter, and the inverter converts DC to AC and transforms the DC bus voltage to the AC loads.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
