International Journal of Scientific Development and Research - IJSDR
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Volume 6 | Issue 1

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Paper Title: Modified High Level DC-DC Converter Based Online Transformerless Uninterruptible Power Supply (UPS)
Authors Name: Shruthi S , Neetha H M , Kiran Kumar G R , Kalpana S
Unique Id: IJSDR2011029
Published In: Volume 5 Issue 11, November-2020
Abstract: To provide reliable and high quality power for critical loads in all grid conditions, Uninterruptible Power Supplies (UPS) are widely used. A non-isolated online uninterruptible power supply (UPS) system is proposed in this paper. This system consists of bridgeless PFC boost rectifier, battery charger/discharger, and an inverter. A new battery charger/discharger has been implemented which ensures the bidirectional flow of power between dc-link and battery bank, reducing the battery bank voltage to only 24V, and regulates the dc-link voltage during battery power mode. Operating batteries in parallel improves the battery performance and resolve the problems related to conventional battery banks that arrange batteries in series. The output voltage for both linear and non-linear loads regulating system is proposed which contains a new control method, integrating slide mode and proportional-resonant control, for inverter. The controller exhibits excellent performance during transients and step changes in load. Operating principle and experimental results of 1kVA prototype have been presented for validation of the proposed system.
Keywords: Uninterruptible power supply, Battery charger/discharger, Power factor correction, transformerless UPS;
Cite Article: "Modified High Level DC-DC Converter Based Online Transformerless Uninterruptible Power Supply (UPS)", International Journal of Science & Engineering Development Research (www.ijsdr.org), ISSN:2455-2631, Vol.5, Issue 11, page no.185 - 194, November-2020, Available :http://www.ijsdr.org/papers/IJSDR2011029.pdf
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Publication Details: Published Paper ID: IJSDR2011029
Registration ID:192710
Published In: Volume 5 Issue 11, November-2020
DOI (Digital Object Identifier):
Page No: 185 - 194
Publisher: IJSDR | www.ijsdr.org
ISSN Number: 2455-2631

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