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An Approach to Harmonic Optimization for 25KVA Auxiliary Converter used in Indian Railway

Shawanti Roy*, Sayan Paramanik**, Krishna Sarker***

*,*** Department of Electrical Engineering, St. Thomas' College of Engineering & Technology, West Bengal, India.

** Department of Servicing, Statcon Electronics India Ltd, Uttar Pradesh, India.

Periodicity:July - September'2023
DOI : https://doi.org/10.26634/jele.13.4.20155

Abstract

As the Indian railway network expands, the demand for reliable and efficient power systems, especially auxiliary converters supporting various on-board systems, grows. By reducing power losses and fuel consumption, it is more crucial to design an energy-efficient and economic auxiliary converter for the railway system. This is partially accomplished by using a 25KVA auxiliary (Aux.) converter, which can accept input electrical energy from a 110V DC battery at Self-Generation (SG) coaches. Biogeography Based Optimization (BBO) method of harmonic elimination for a 25KVA converter is described in this study. The paper explores the 120-degree mode of conduction and compares the existing technique with a proposed 7-switching selective odd harmonic removal method. Results from Matlab simulations demonstrate the effectiveness of the BBO technique in reducing Total Harmonic Distortion (THD). The output voltage waveforms with and without BBO are compared, showcasing a significant improvement in harmonic suppression. The paper concludes by emphasizing the practical implementation of the optimized switching angles using an ATmega2560R3 microcontroller. The online application of stored switching angles on the microcontroller is calculated offline.

Keywords

Biogeography Based Optimization (BBO), Total Harmonic Distortion (THD), 25KVA Converter, Self-Generation (SG) Coaches, 120^o Conduction Mode, Railway System.

How to Cite this Article?

Roy, S., Paramanik, S., and Sarker, K. (2023). An Approach to Harmonic Optimization for 25KVA Auxiliary Converter used in Indian Railway. i-manager’s Journal on Electronics Engineering, 13(4), 36-47. https://doi.org/10.26634/jele.13.4.20155

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