Book ChapterDOI
Performance Evaluation of Multi DC and Single DC Source on Cascaded Multi-Level Inverter
J. Gowrishankar,J. Belwin Edward,E. Kaliappan,N. Prabakaran,G. Balasundaram +4 more
- Vol. 700, pp 211-220
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TLDR
In this paper, the performance of Cascaded Multi-Level Inverter (CMLI) and single DC source of asymmetrical and symmetrical multi-level Inverters (MLI), were analyzed in MATLAB software platforms.Abstract:
In Cascaded Multi-Level Inverter (CMLI), the multi DC source and single DC source of asymmetrical and symmetrical Multi-level Inverters (MLI) are analyzed in this research paper. In single DC source, the switching pulse generation for nine-level H-bridge CMLI is generated using Phase Disposition Pulse Width Modulation (PDPWM). Here, four H-bridge CMLI has parallel connection, and the output of each H-bridge CMLI with the primary side of the transformer is also linked in parallel. The secondary side of the transformer is connected in series with load. It consists of one H-bridge inverter, 8 diodes, and two-bidirectional switches for bidirectional current flows through two switch S5, S6, and S7. The capacitor C4, C3, C2, and C1 are meant to separate the input DC voltage by Vdc, 3Vdc/4, Vdc/2, and Vdc/4. In multi DC source of symmetrical and asymmetrical CMLI switches are controlled by using Low-Frequency Pulse Width Modulation Technique (LFPWM). The nine-level symmetrical CMLI DC voltage source are Vdc1 = 1, Vdc2 = 1, Vdc3 = 1, and Vdc4 = 1. The 31-level asymmetrical CMLI DC voltage source are Vdc1 = 1, Vdc2 = 2, Vdc3 = 4, and Vdc4 = 8. All the multi DC Source and single-DC source of CMLI are analyzed in MATLAB software platforms. Comparison of the results with these simulations has been made, and the performance of the proposed system indicated by the THD. Hardware implementations have been done for asymmetrical MLI by using TMS320F2802A processor.read more
Citations
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Journal ArticleDOI
Design and control of bypass diode multilevel inverter using a single DC source
TL;DR: In this article , a bypass diode technique is used and 31 levels are obtained using a small and inexpensive high-frequency link (HFL) to obtain the input voltages from a DC source.
References
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Multilevel inverters: a survey of topologies, controls, and applications
TL;DR: The most important topologies like diode-clamped inverter (neutral-point clamped), capacitor-Clamped (flying capacitor), and cascaded multicell with separate DC sources are presented and the circuit topology options are presented.
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A comprehensive study of neutral-point voltage balancing problem in three-level neutral-point-clamped voltage source PWM inverters
TL;DR: In this paper, the fundamental limitations of the neutral-point voltage balancing problem for different loading conditions of three-level voltage source inverters are explored and a new model in the DQ coordinate frame is developed as a means to investigate theoretical limitations and to offer a more intuitive insight into the problem.
Journal ArticleDOI
Evaluation of three-phase transformerless photovoltaic inverter topologies
TL;DR: In this article, the authors compared three transformerless photovoltaic inverter topologies for three-phase grid connection with the main focus on the safety issues that result from the lack of galvanic isolation.
Journal ArticleDOI
Single-Phase Seven-Level Grid-Connected Inverter for Photovoltaic System
TL;DR: This paper proposes a single-phase seven-level inverter for grid-connected photovoltaic systems, with a novel pulsewidth-modulated (PWM) control scheme, which was verified through simulation and implemented in a prototype.
Journal ArticleDOI
Performance of cascaded multilevel inverter by employing single and three-phase transformers
Anup Kumar Panda,Y. Suresh +1 more
TL;DR: In this article, a cascaded multilevel H-bridge inverter with low-frequency three-phase transformers and a single dc power source is proposed to reduce the number of components and so reduce the complexity of the circuit.