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All Journal International Journal of Power Electronics and Drive Systems (IJPEDS) Indonesian Journal of Electrical Engineering and Computer Science
Sreedhar Madichetty
KIIT Univeristy
Control & Systems Engineering Electrical & Electronics Engineering

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Harmonic Mitigated Front End Three Level Diode Clamped High Frequency Link Inverter by Using MCI Technique Sreedhar Madichetty; Abhijit Dasgupta; Soumyadeep Ray
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 4, No 1: March 2014
Publisher : Institute of Advanced Engineering and Science

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Abstract

In this paper it proposes a high efficient soft-switching scheme based on zero-voltage-switching (ZVS) and zero-current-switching(ZCS) principle operated with a simple auxiliary circuit extended range for the front-end isolated DC-AC-DC-AC high power converter with an three phase three level diode clamped multi level inverter by using Minority Charge Carrier inspired optimization technique (MCI) with Total Harmonic Distortion(THD),Switching losses, Selective harmonic elimination maintaining with its fundamental as an objective function. Input to the inverter is obtained by the photo voltaic cells and with battery bank. The switching scheme is optimized by MCI technique, analyzed and executed in Matlab and implemented with a digital signal processor (DSP) .Experimental results with different loads have observed and shows its effectives, robustness of the applied technique.DOI: http://dx.doi.org/10.11591/ijpeds.v4i1.5019
A Survey and experimental verification of Modular Multilevel Converters Sreedhar Madichetty; Dasgupta Abhijit; Sivaji Jinka
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 4, No 3: September 2014
Publisher : Institute of Advanced Engineering and Science

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Abstract

This article is devoted to the Multi-level converters review and specifically the form and function of modular multilevel converter (MMC) with their modulation, design considerations, balancing issues, control schemes, and applications. This article intends to make a detailed analysis of MMC with their controller related issues in comprehensive manner. It is an approach for MMC design and modulation schemes in easy manner. Furthermore, a five level MMC have been designed with optimal controller and verified by its experimental results and explored. In addition to that, this approach draws strategic conclusions on MMC towards making the system more robust in operation, less complex in design and control.DOI: http://dx.doi.org/10.11591/ijpeds.v4i3.5914
Experimental Verification of Circulating Current Mitigation Scheme in MMC by Using ISE Technique Sreedhar Madichetty; Abhijit Dasgupta
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 5: May 2014
Publisher : Institute of Advanced Engineering and Science

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Abstract

The circulating currents of a modular multilevel converter (MMC) is ideally assumed to be the sum of an ac component and dc ac component operating with fundamental frequency. However, as ac current flows through the submodule (SM) capacitors, the capacitor voltages fluctuate with time. Consequently, the circulating current is usually distorted and allows multiple frequency components with the peak value of it is increased compared with the theoretical value. The circulating currents will increase power losses and may threaten the safe operation of the switching devices and module capacitors. This article proposes a MMC with a new controller design to mitigate circulating currents for various modulation indexes for wide ranges in load. This new controller is optimized with upper and lower module voltages as an objective function. The optimum values for controller are obtained by using conventional integral square error technique (ISE). The proposed scheme shows its effectiveness by controlling the circulating currents for various loads. It made strategic conclusions on MMC to make the system more robust in operation and less complexity in design and control. The proposed system is verified by 10 KVA prototypes MMC and results are explored. DOI : http://dx.doi.org/10.11591/telkomnika.v12i5.5364
Co-Authors Abhijit Dasgupta Abhijit Dasgupta Dasgupta Abhijit Sivaji Jinka Soumyadeep Ray