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Investigation of a Cascaded H-bridge Photovoltaic Inverter under non-Uniform Insolation Conditions by Hardware-in-the-Loop Test

Iman-Eini, Hossein and TENNAKOON, Sarath (2019) Investigation of a Cascaded H-bridge Photovoltaic Inverter under non-Uniform Insolation Conditions by Hardware-in-the-Loop Test. International Journal of Electrical Power and Energy Systems, 105. pp. 330-340. ISSN 0142-0615 (In Press)

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Abstract or description

Abstract- In this paper, the cascaded H-bridge (CHB) multilevel inverter is employed as a grid connected inverter. This kind of inverter has interesting features compared to conventional inverters, including better efficiency, lower THD, lower common mode current injection, and better waveform quality. Using a series connection of H-bridge cells in this topology, a high modularity is achieved and a stepwise voltage waveform is synthesized at the ac side, leading to lower filter size and complexity. This topology processes the electric power in one stage and does not need any step-up voltage transformer for grid connection. The dynamic performance of control system is studied through simulations and is compared with the conventional approach. In addition, a new voltage estimation approach is proposed to reduce the number of voltage sensors compared to existing methods. The simulation results are presented for a 1.5 kW grid connected 7-level CHB inverter and then the hardware-in-the-loop implementation of the CHB inverter is presented to verify the performance of control system.
Keywords- Cascaded H-bridge Inverter, Grid Connection, Hardware-in-the-loop implementation, Photovoltaics, and Real-time simulation.

Item Type: Article
Faculty: School of Creative Arts and Engineering > Engineering
Depositing User: Library STORE team
Date Deposited: 05 Sep 2018 14:07
Last Modified: 05 Sep 2018 14:07
URI: http://eprints.staffs.ac.uk/id/eprint/4731

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