Picture of person typing on laptop with programming code visible on the laptop screen

World class computing and information science research at Strathclyde...

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 University of Strathclyde researchers, including by researchers from the Department of Computer & Information Sciences involved in mathematically structured programming, similarity and metric search, computer security, software systems, combinatronics and digital health.

The Department also includes the iSchool Research Group, which performs leading research into socio-technical phenomena and topics such as information retrieval and information seeking behaviour.


PV single-phase grid-connected converter : dc-link voltage sensorless prospective

Zakzouk, Nahla E. and Abdelsalam, Ahmed K. and Helal, Ahmed A. and Williams, Barry W. (2017) PV single-phase grid-connected converter : dc-link voltage sensorless prospective. IEEE Journal of Emerging and Selected Topics in Power Electronics, 5 (1). pp. 526-546. ISSN 2168-6777

Text (Zakzouk-etal-JESTPE2016-PV-single-phase-grid-connected-converter)
Zakzouk_etal_JESTPE2016_PV_single_phase_grid_connected_converter.pdf - Accepted Author Manuscript

Download (1MB) | Preview


In this paper, a dc-link voltage sensorless control technique is proposed for single-phase two-stage grid-coupled photovoltaic (PV) converters. Matching conventional control techniques, the proposed scheme assigns the function of PV maximum power point tracking to the chopper stage. However, in the inverter stage, conventional techniques employ two control loops: outer dc-link voltage and inner grid current control loops. Diversely, the proposed technique employs only current control loop and mitigates the voltage control loop, thus eliminating the dc-link high-voltage sensor. Hence, system cost and footprint are reduced, and control complexity is minimized. Furthermore, the removal of the dc-link voltage loop proportional-integral controller enhances system stability and improves its dynamic response during sudden environmental changes. The system simulation is carried out, and an experimental rig is implemented to validate the proposed technique effectiveness. In addition, the proposed technique is compared with the conventional one under varying irradiance conditions at different dc-link voltage levels, illustrating the enhanced capabilities of the proposed technique.