Ph.D dissertation

 

Title: Operation of wind generators in small autonomous grids  

Submitted to the School of ECE of the Aristotle University of Thessaloniki, Greece in 1991.

 

Publications in peer-reviewed scientific journals

J.1  C. Demoulias, P. Dokopoulos, D. Tampakis, “Transient forces in three phase gas cables”, Archiv fuer Elektrotechnik 68 (1985) Seite, 241-248

J.2  P. Dokopoulos, D. Tampakis, C. Demoulias. “Short circuit forces in three phase tubular bus bars with steel enclosures”, etz Archiv, Band 7, Heft 11, November 1985, Seite 357-362.

J.3  C.S. Demoulias, P.S. Dokopoulos “Transient behavior and self-excitation of wind-driven induction generator after its disconnection from the power grid” IEEE Transactions on Energy Conversion Vol.5, No 2, June 1990, pp 272-278.

J.4 C.S. Demoulias, P.S. Dokopoulos “Electrical transients of wind turbines connected to a power grid”  IEEE Transactions on Energy Conversion,  Vol.11, No 3, September 1996, pp 636-642

J.5 Petros S. Dokopoulos, Charalampos S. Dimoulias, Iordanis M. Manousaridis and Athanasios X. Patralexis ‘Improvement of Power Quality in a Grid with Wind Turbines using Inductive Storage’,  Wind Engineering, Volume 23, No. 4, 1999.

J.6 C. Demoulias, D. Labridis, P. Dokopoulos, K. Gouramanis, “Ampacity of low voltage power cables under non sinusoidal currents”, IEEE Trans. On Power Delivery. January 2007, Vol. 22, No.1, pp. 584–594.

J.7 C. Demoulias, K. GouramanisVoltage Multiple-Zero-Crossings at Buses Feeding Large Triac-Controlled Loads”, IEEE Trans. On Industrial Electronics, Vol. 54, Issue 5, October 2007, pp. 2853-2863

J.8 Charis Demoulias, Dimitris P. Labridis, Petros Dokopoulos, Kostas Gouramanis, “Influence of metallic trays on the ac resistance and ampacity of low-voltage cables under non-sinusoidal currents”, Electric Power Systems Research, May 2008, Vol. 78, No.5, pp.883-896

J.9 Kostas Gouramanis, Charis Demoulias, Dimitris P. Labridis, Petros Dokopoulos, “Distribution of Non-Sinusoidal Currents in Parallel Conductors Used in 3-Phase TN-S Systems”, Electric Power Systems Research, May 2009, Vol. 79, No.5, pp. 766–780

J.10 Charis Demoulias, Dimitris Goutzamanis, Kostas Gouramanis, “Analysis of the Voltage Harmonic Distortion at Buses Feeding Office Loads”, IEΤ Science Measurement and Technology, July 2009, Volume 3, Issue 4, p. 286-301

J.11 Charis Demoulias, “A new simple analytical method for calculating the optimum inverter size in grid-connected PV plants”, Electric Power Systems Research, Vol. 80, Issue 10, October 2010, pp.  1197–1204, doi:10.1016/j.epsr.2010.04.005

J.12 Papaioannou I. T.; Alexiadis M. C.; Demoulias C. S.; Labridis D. P.; Dokopoulos, P. S., “Modeling and Field Measurements of Photovoltaic Units Connected to LV Grid. Study of Penetration Scenarios”, IEEE Transactions on Power Delivery, Volume: 26, Issue: 2, 2011, p. 979 – 987, doi:10.1109/TPWRD.2010.2095888

J.13 Kyriaki-Nefeli D. Malamaki and Charis S. Demoulias., “Minimization of Electrical Losses in Two – axis Tracking PV Systems”, IEEE Transactions on Power Delivery, Volume: 28, Issue: 4, Oct. 2013, p. 2445 – 2455, DOI: 10.1109/TPWRD.2013.2272405

J.14 Spyros I. Gkavanoudis and Charis S. Demoulias, “A Combined Fault Ride-Through and Power Smoothing Control Method for Full-Converter Wind Turbines Employing Supercapacitor Energy Storage System”, Electric Power Systems Research, Vol. 106, January 2014, pp. 62-72, doi:10.1016/j.epsr.2013.08.007

J.15 Ioulia T. Papaioannou, Arturs Purvins, Charis S. Demoulias, “Reactive power consumption in photovoltaic inverters: a novel configuration for voltage regulation in low-voltage radial feeders with no need for central control”, Progress in Photovoltaics: Research and Applications, doi: 10.1002/pip.2477, 2014

J.16 Kyriaki-Nefeli D. Malamaki and Charis S. Demoulias, “Analytical Calculation of the Electrical Energy Losses on Fixed-Mounted PV Plants”, IEEE Transactions on Sustainable Energy, Vol. 5, No. 4, October 2014

J.17 Konstantinos O. Oureilidis, Charis S. Demoulias, “An enhanced role for an energy storage system in a microgrid with converter interfaced sources”, IET The Journal of Engineering, doi: 10.1049/joe.2014.0281, 2014

J.18 D. Bozalakov, T.L. Vandoorn, B. Meersman, C. Demoulias, L. Vandevelde, “Voltage dip mitigation capabilities of three-phase damping control strategy”, Electric Power Systems Research, Vol. 121, April 2015, pp. 192–199,  doi:10.1016/j.epsr.2014.12.012

J.19 Spyros I. Gkavanoudis, Charis S. Demoulias, “Fault ride-through capability of a DFIG in isolated grids employing DVR and supercapacitor energy storage”, International Journal of Electrical Power and Energy Systems, Vol. 68, June 2015, pp. 356–363, doi:10.1016/j.ijepes.2014.12.068

J.20 Spyros I. Gkavanoudis, Charis S. Demoulias, “A control strategy for enhancing the Fault Ride-Through capability of a microgrid during balanced and unbalanced grid voltage sags”, Sustainable Energy, Grids and Networks, Vol. 3, September 2015, pp. 1-11, doi:10.1016/j.segan.2015.05.001

J.21 Konstantinos O. Oureilidis, Charis S. Demoulias, “A Fault Clearing Method In Converter-Dominated Microgrids with Conventional Protection Means”, IEEE Transactions on Power Electronics, Vol. 31, No. 6, June 2016, doi:10.1109/TPEL.2015.2476702

J.22 Konstantinos O. Oureilidis, Charis S. Demoulias, “A decentralized impedance-based adaptive droop method for power loss reduction in a converter-dominated islanded microgrid”, Sustainable Energy, Grids and Networks, Vol. 5, March 2016, pp. 39-49, doi:10.1016/j.segan.2015.11.003

J.23 Konstantinos O. Oureilidis, Emmanouil A. Bakirtzis, Charis S. Demoulias, “Frequency-based Control Of Islanded Microgrid with Renewable Energy Sources and Energy Storage”, Journal of Modern Power Systems and Clean Energy, doi:10.1007/s40565-015-0178-z.

J.24 G. Kryonidis; C. Demoulias; G. Papagiannis, “A Nearly Decentralized Voltage Regulation Algorithm for Loss Minimization in Radial MV Networks With High DG Penetration,” in IEEE Transactions on Sustainable Energy , vol.PP, no.99, pp.1-1, doi: 10.1109/TSTE.2016.2556009

J.25 Spyros I. Gkavanoudis, Konstantinos O. Oureilidis, Georgios C. Kryonidis, and Charis S. Demoulias, “A Control Method for Balancing the SoC of Distributed Batteries in Islanded Converter-Interfaced Microgrids,” Advances in Power Electronics, vol. 2016, Article ID 8518769, 11 pages, 2016. doi:10.1155/2016/8518769

J.26. . Kryonidis; C. Demoulias; G. Papagiannis, “A Nearly Decentralized Voltage Regulation Algorithm for Loss Minimization in Radial MV Networks With High DG Penetration,” in IEEE Transactions on Sustainable Energy , vol.PP, no.99, pp.1-1, doi: 10.1109/TSTE.2016.2556009

J.27 Georgios Kryonidis, Eleftherios Kontis, Andreas Chrysochos, Charis Demoulias and Grigoris Papagiannis, “A Coordinated Droop Control Strategy for Overvoltage Mitigation in Active Distribution Networks”, IEEE Transactions on Smart Grids, DOI: 10.1109/TSG.2017.2685686

 

Publications in peer-reviewed conferences

C.1  P. Dokopoulos, C. Demoulias, P. Fessas. “Protection considerations of an autonomous island power system using wind generators”. Delphi Workshop on Wind Energy Applications 1985, Delphi.

C.2 Dan I. Teodoreanu, Charis Demoulias, Miklos Palfy, Alison Murray “SPORE – An European Project for Social Objectives in Remote Places in Romania” 16th EC-Photovoltaic Solar Energy Conference, 1-5 May 2000, Glasgow, UK.

C.3 Dan I. Teodoreanu, Maria Teodoreanu, Bogdan Atanasiu, Charis Demoulias, Miklós Palfy: “PV Systems for social objectives installed in remote places in Romania. Performances and operational experience”, 17th European Photovoltaic Solar Energy Conference, Munich, Germany, November 2001.

C.4 C. Demoulias, “Harmonics in Spinning Mills: Causes, effects and solutions”, Proc. of UPEC 2003 Conference, Thessaloniki, September 2003.

C.5 C. Demoulias, S. Samoladas, K. Gouramanis “Harmonics induced problems in theatrical-lighting installation: real case measurements and proposed solutions”, Proc. IEEE PowerTech 2005 Conference, St. Petersburg, June 2005, Paper 301, doi: 10.1109/PTC.2005.4524485

C.6 K. Gouramanis, C. Demoulias,  “Cable Overheating in an Industrial Substation Feeder Due to Untransposed Power Cables – Measurement and Simulation” The International Conference on Computer as a Tool, 2005, EUROCON 2005. Volume 2, 2005 Page(s):1438 – 1441, doi: 10.1109/EURCON.2005.1630233

C.7 Athanasios S. Dagoumas, Antonios G. Marinopoulos, Filippos S. Kianidis, Charalambos S. Demoulias, and Petros S. Dokopoulos, “Influence of Distributed Generators on the Harmonic Level of a 20kV Distribution Network.”, ICEM 2006 Conference, Chania, 2006

C.8 Charis Demoulias, Dimitris Goutzamanis, Kostas Gouramanis, “Voltage Harmonic Distortion at Buses Feeding Office Loads.”, Proc. IEEE PowerTech07 Conference, Lausanne, June 2007, Paper 347, doi: 10.1109/PCT.2007.4538545

C.9 I.T. Papaioannou, A.S. Bouhouras, A.G. Marinopoulos, M.C.Alexiadis, C.S. Demoulias and D.P. Labridis: “Harmonic Impact of Small Photovoltaic Systems Connected to the LV Distribution Network,” EEM 08 (5th International Conference on the European Electricity Market), Lisbon, Portugal, May 28-30, 2008, doi: 10.1109/EEM.2008.4579061

C.10 Charis Demoulias, Zoe Kampouri, Kostas Gouramanis, «Natural Canceling of Current Harmonics in Office Loads and its Effect upon the Transmission Capacity of Distribution Cables», Proc. International Symposium on Industrial Electronics 2008, Cambridge, UK, June 2008, doi: 10.1109/ISIE.2008.4676958

C.11 I.T. Papaioannou, A.S. Bouhouras, A.G. Marinopoulos, M.C. Alexiadis, C.S. Demoulias, D.P. Labridis “Harmonic Modeling and Simulation of Small Photovoltaic Systems Connected to the LV Distribution Network” MedPower 2008, November 2-5 2008, Thessaloniki, Greece.

C.12 I.T. Papaioannou, M. Alexiadis, C. Demoulias, D. Labridis, P. Dokopoulos “Harmonics induced in low-voltage networks by photovoltaics” 3rd International Conference on Integration of Renewable and Distributed Resources, Nice, France, December 10-12, 2008

C.13 Χάρης Δημουλιάς, Κώστας Γκουραμάνης, “Βέλτιστη διαστασιολόγηση αντιστροφέων dc/ac σε διασυνδεδεμένα με το δίκτυο ΦΒ συστήματα – Παρουσίαση μετρήσεων φωτοβολταϊκής εγκατάστασης 20 kWp, διασυνδεδεμένης με το δίκτυο χαμηλής τάσης.” 9o Εθνικό Συνέδριο για τις Ήπιες Μορφές Ενέργειας, Δήμος Γεροσκήπου, Πάφος, Κύπρος, 26-28 Μαρτίου 2009.

C.14 Ioulia T.Papaioannou, Minas S. Alexiadis, Charis S.Demoulias, Dimitris P.Labridis, P.Dokopoulos, «Modelling and Measurement of Small Photovoltaic Systems and Penetration Scenarios», IEEE Power Tech 2009 Conference, Bucharest, Romania, 28 June- 02 July 2009, doi: 10.1109/PTC.2009.5281836

C.15 Mesemanolis, A.; Pontikidis, D.; Demoulias, C.; «A new modulation technique for reduced harmonic distortion of current in PV inverters», IEEE EUROCON – International Conference on Computer as a Tool, 2011, Lisbon, Portugal. doi: 10.1109/EUROCON.2011.5929199

C.16 Vlachopoulos, S.; Demoulias, C.; “Voltage regulation in low-voltage rural feeders with distributed PV systems”, IEEE EUROCON – International Conference on Computer as a Tool, 2011, Lisbon, Portugal, doi:  10.1109/EUROCON.2011.5929198

C.17 Oureilidis, K.O.; Demoulias, C.S., “Microgrid wireless energy management with energy storage system,” 47th International Universities Power Engineering Conference (UPEC), 2012, pp.1,6, 4-7 Sept. 2012 doi: 10.1109/UPEC.2012.6398684

C.18 Gkavanoudis, S.I.; Demoulias, C.S., “A new Fault Ride-Through control method for full-converter wind turbines employing Supercapacitor Energy Storage System,” 47th International Universities Power Engineering Conference (UPEC), 2012, pp.1-6, 4-7 Sept. 2012 doi: 10.1109/UPEC.2012.6398683

C.19  Bakirtzis, E.A. ; Demoulias, C., “Control of a micro grid supplied by renewable energy sources and storage batteries,” XXth International Conference on Electrical Machines (ICEM), 2012, doi: 10.1109/ICElMach.2012.6350165, 2012, Page(s): 2053-2059.

C.20 Kyriaki-Nefeli Malamaki, Charis Demoulias, “A decentralized voltage regulation method in low-voltage feeders with PV systems and domestic loads”, in POWERENG 2013-4th International Conference on Power Engineering, Energy and Electrical Drives, Istanbul, Turkey, 13-17 May 2013, doi: 10.1109/PowerEng.2013.6635652

C.21 Konstantinos O. Oureilidis, Charis S. Demoulias, “A Control Strategy for Inverter-Interfaced Microgrids Under Symmetrical and Asymmetrical Faults”, in ICRERA 2013 – International Conference on Renewable Energy Research and Applications, 20 Oct – 23 Oct 2013, Madrid, Spain, doi: 10.1109/ICRERA.2013.6749752

C.22 Spyros I. Gkavanoudis, Charis S. Demoulias and Konstantinos O. Oureilidis, “Fault Ride-Through Capability of a Microgrid With WTGs and Supercapacitor Storage During Balanced and Unbalanced Utility Voltage Sags”, in ICRERA 2013 – International Conference on Renewable Energy Research and Applications, 20 Oct – 23 Oct 2013, Madrid, Spain, doi: 10.1109/ICRERA.2013.6749757

C.23     Oureilidis, K.O.; Gkavanoudis, S.I.; Demoulias, C.S., “Fault clearing in a converter-dominated microgrid with traditional protection means,” Power Electronics for Distributed Generation Systems (PEDG), 2014 IEEE 5th International Symposium on , vol., no., pp.1,7, 24-27 June 2014, doi: 10.1109/PEDG.2014.6878646

C.24     Gkavanoudis, S.I.; Demoulias, C.S., “FRT capability of a DFIG in isolated grids with Dynamic Voltage Restorer and Energy Storage,” Power Electronics for Distributed Generation Systems (PEDG), 2014 IEEE 5th International Symposium on, vol., no., pp.1,8, 24-27 June 2014, doi: 10.1109/PEDG.2014.6878661

C.25 G.C. Kryonidis, E.O. Kontis, A.I. Chrysochos, C.S. Demoulias, D. Bozalakov, B. Meersman, T.L. Vandoorn, L. Vandevelde, “A simulation tool for extended distribution grids with controlled distributed generation”, IEEE PowerTech Conference, June 29 2015-July 2 2015, Eindhoven, The Netherlands, doi: 10.1109/PTC.2015.7232778

C.26 K. O. Oureilidis, S. I. Gkavanoudis and C. S. Demoulias, “Impedance-based adaptive droop method in islanded microgrids with three-phase and single-phase converters for line loss reduction,” 2016 IEEE 17th Workshop on Control and Modeling for Power Electronics (COMPEL), Trondheim, Norway, 2016, pp. 1-8., doi: 10.1109/COMPEL.2016.7556697

C.27 S. I. Gkavanoudis, K. O. Oureilidis and C. S. Demoulias, “An adaptive droop control method for balancing the SoC of distributed batteries in AC microgrids,” 2016 IEEE 17th Workshop on Control and Modeling for Power Electronics (COMPEL), Trondheim, Norway, 2016, pp. 1-6. doi: 10.1109/COMPEL.2016.7556698

C.28 G. C. Kryonidis, E. O. Kontis, A. I. Chrysochos, C. S. Demoulias, and G. K. Papagiannis “Coordinated phase-based voltage regulation in active unbalanced LV distribution networks,” Proceedings of the 51st UPEC 2016, Coimbra, Portugal, September 6 – 9, 2016.

C.29 E. O. Kontis, G. C. Kryonidis, A. I. Chrysochos, C. S. Demoulias, and G. K. Papagiannis “Long-term evaluation of DRES penetration in LV networks using droop control techniques,” Proceedings of the ISGT Europe 2016, Ljubljana, Slovenia, October 9 – 12, 2016.

C.30  G. C. Kryonidis, N. V. Theologou, A. I. Chrysochos, C. S. Demoulias, and G. K. Papagiannis “An enhanced decentralized voltage regulation scheme for the reduction of tap changes in HV/MV transformers under high DG penetration,” Proceedings of the ISGT Europe 2016, Ljubljana, Slovenia, October 9 – 12, 2016.

C.31  E. O. Kontis, G. C. Kryonidis, A. I. Chrysochos, C. S. Demoulias, and G. K. Papagiannis “Effect of Load Modeling in Coordinated Active Power Curtailment of Distributed Renewable Energy Sources,” Proceedings of the 10th MedPower 2016, Belgrade, Serbia, November 6 – 9, 2016.K.

C.32 K. O. Oureilidis, S. I. Gkavanoudis, K. N. Malamaki and C. S. Demoulias, “Fault detection and clearing control strategy in an islanded microgrid with converter-interfaced sources,” 2017 IEEE Manchester PowerTech, Manchester, 2017, pp. 1-6. doi: 10.1109/PTC.2017.7981176

C.33 K. N. D. Malamaki, I. Konstantinidis and C. S. Demoulias, “Analytical evaluation of the annual load duration curve of domestic prosumers,” 2017 IEEE Manchester PowerTech, Manchester, 2017, pp. 1-6. doi: 10.1109/PTC.2017.7981183

C.34 G. C. Kryonidis, A. I. Chrysochos, C. S. Demoulias and G. K. Papagiannis, “Performance of solid-state transformers on voltage regulation of active distribution networks,” 2017 IEEE Manchester PowerTech, Manchester, 2017, pp. 1-6. doi: 10.1109/PTC.2017.7980900