Enhanced Control for Improving the Operation of Grid-Connected Power Converters under Faulty and Saturated Conditions
Location: Switzerland
Publication date: 2018-02-28
Published in: Energies, February 2018
ref. DOI:10.3390/en11030525

Local members

Alvaro Luna

PhD. Senior Researcher.

Joan Rocabert

PhD. Senior Researcher

Mahdi Shahparasti

PhD. Junior Researcher

Nurul Fazlin Roslan

Junior Researcher

External members



In renewable energy based systems Grid-Connected Voltage Source Converters (GC-VSC) are used in many applications as grid-feeding converters, which transfer the power coming from the renewable energy sources to the grid. In some cases, the operation of GC-VSC may become unstable or uncontrollable due to, among others: a grid fault or an inappropriate current-power reference, that give rise to fast electrical transients or a saturation of the controller. In this paper, an improved control scheme is proposed to enhance the controllability of GC-VSC in all these situations. This solution consists of two parts, on the one hand a new Proportional-Resonant (PR) controller with anti-windup capability to be used as current controller, and secondly a new current/power reference modifier, which defines the suitable reactive current/power reference to keep the system stable. It is worth to mention that the proposed scheme does not need information about the grid parameters as it only uses the converter current, and the voltage at the capacitors of Inductor-Capacitor (LC) output filter.


Associated projects

National public