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Open Access research with a European policy impact...

The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by Strathclyde researchers, including by researchers from the European Policies Research Centre (EPRC).

EPRC is a leading institute in Europe for comparative research on public policy, with a particular focus on regional development policies. Spanning 30 European countries, EPRC research programmes have a strong emphasis on applied research and knowledge exchange, including the provision of policy advice to EU institutions and national and sub-national government authorities throughout Europe.

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A single-stage three-phase inverter based on cuk converters for PV applications

Badawy, Ahmed and Holliday, Derrick and Ahmed, Shehab and Massoud, Ahmed and Williams, Barry (2014) A single-stage three-phase inverter based on cuk converters for PV applications. IEEE Journal of Emerging and Selected Topics in Power Electronics. ISSN 2168-6777

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Abstract

This paper presents a new three-phase inverter based on the Cuk converter. The main feature of the proposed topology is that the energy storage elements such as inductors and capacitors, can be reduced in order to improve the reliability, reduce the size, and the total cost. The buck-boost inherent characteristic of the Cuk converter, depending on the time-varying duty ratio, provides flexibility for stand-alone and grid connected applications when the required output ac voltage is lower or greater than the dc side voltage. This property is not found in the conventional current source inverter when the dc input current is always greater than the ac output or in the conventional voltage source inverter as the output ac voltage is always lower than the dc input. The proposed system allows much smaller, more reliable non-electrolytic capacitors to be used for energy source filtering. The new three-phase inverter is convenient for PV applications where continuous input currents are required for maximum power point tracking operation. Average large and small signal models are used to study the Cuk converter’s nonlinear operation. The basic structure, control design, and MATLAB/SIMULINK results are presented. Practical results substantiate the design flexibility of the Cuk based topology controlled by a TMSF280335 DSP.