Online Detection and Estimation of Grid Impedance Variation for Distributed Power Generation

Manel Jebali-Ben Ghorbal, Walid Ghzaiel, Ilhem Slama-Belkhodja, Josep M. Guerrero

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

17 Citations (Scopus)
2506 Downloads (Pure)


A better knowledge of the grid impedance is essential in order to improve power quality and control of the Distributed Power Generation Systems (DPGS) and also for a safe connection or reconnection to the utility grid. An LCL-filter
associated to a Voltage Source Inverter (VSI) is usually used in DPGS based on renewable energy. The VSI controller is used to determine the grid impedance in both healthy operation and faulty modes. When grid faults occurence, the grid impedance variations have a considerable influence on the control and the
stability of the system, even on the decision to disconnect the DPG systems of the network. This work presents a rapid and simple technique to detect the grid impedance variation and to determine the grid impedance before and after grid faults accurs. Implementation on FPGA control board, simulations and experimental results are presented to validate the described method.
Original languageEnglish
Title of host publicationProceedings of the 16th IEEE Mediterranean Electrotechnical Conference (MELECON), 2012
Number of pages6
PublisherIEEE Press
Publication date2012
ISBN (Print)978-1-4673-0782-6
Publication statusPublished - 2012
EventThe 16th Mediterrarean Electrotechnical Conference - , Tunisia
Duration: 25 Mar 201228 Mar 2012


ConferenceThe 16th Mediterrarean Electrotechnical Conference
SeriesIEEE Mediterranean Electrotechnical Conference (MELECON), proceedings

Fingerprint Dive into the research topics of 'Online Detection and Estimation of Grid Impedance Variation for Distributed Power Generation'. Together they form a unique fingerprint.

Cite this