Modelling of Diesel Generator Sets That Assist Off-Grid Renewable Energy Micro-grids

Johanna Salazar, Fernando Tadeo, Cesar Prada


This paper focuses on modelling diesel generators for off-grid installations based on renewable energies. Variations in Environmental Variables (for example, Solar Radiation and Wind Speed) make necessary to include these auxiliary systems in off-grid renewable energy installations, in order to ensure minimal services when the produced renewable energy is not sufficient to fulfill the demand. This paper concentrates on modelling the dynamical behaviour of the diesel generator, in order to use the models and simulations for developing and testing advanced controllers for the overall off-grid system. The Diesel generator is assumed to consist of a diesel motor connected to a synchronous generator through an electromagnetic clutch, with a flywheel to damp variations. Each of the components is modelled using physical models, with the corresponding control systems also modelled: these control systems include the speed and the voltage regulation (in cascade regulation).


renewable energies; off-grid systems; diesel generators; modelling

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Maher Chaabene and M. Annabi, “Dynamic Model for Predicting Solar Plant Performance and Optimum Control”, Energy Vol. 22, No. 6, pp. 567-578, 1997.

Maher Chaabene, “Measurements based dynamic climate observer”, Science Direct, Solar Energy 82 (2008) 763–771

Mohamed A. Mohandes, Shafiqur Rehman and Talal O. Halawani. “A Neural Networks Approach for Wind Speed Prediction”, Renewable Energy, Vol. 13, No. 3, pp. 345-354, 1998

M.K. Deshmukh and S.S. Deshmukh, “Modeling of hybrid renewable energy systems”, Renewable and Sustainable Energy Reviews 12 (2008) 235–249.

E.M. Nfah, J.M. Ngundam, “Modelling of wind/Diesel/battery hybrid power systems for far North Cameroon”, Energy Conversion and Management 49 (2008) 1295–1301.

J. Salazar, F. Tadeo and C. Prada, “Renewable Energy for Desalinization using Reverse Osmosis”, International Conference on Renewable Energies and Power Quality (ICREPQ’10), Granada (Spain), 23th to 25th March, 2010

J. Salazar, F. Tadeo, C. de Prada and L. Palacin, “Modelling and control of MicroGrids in Island Operation”, International Renewable Energy Congress, November 5-7, 2009, Sousse Tunisia.

T. Loix, K. De Brabandere, J. Driesen and R. Belmans. “A Three-Phase Voltage and Frequency Droop Control Scheme for Parallel Inverters” The 33rd Annual Conference of the IEEE Industrial Electronics Society (IECON)Nov. 5-8, 2007, Taipei, Taiwan

Karel De Brabandere, Bruno Bolsens, Jeroen Van den Keybus, Achim Woyte, Johan Driesen and Ronnie Belmans, Fellow. “A Voltage and Frequency Droop Control Method for Parallel Inverters”, IEEE Transactions on power electronics, Vol. 22, Nº. 4, July 2007.

Dr.-Ing. Alfred Engler, “Applicability of droops in low voltage grids”, DER JOURNAL NO. 1, JANUARY 2005

Sunny Island installation and instruction manual, “Operation together with Sunny Boys”,Version 2.1, SI5048-12:EE3107, chapter 14, Section 14.1.8, page 116.

P. E. Wellstead and P. M. Zanker, “Application of self-tuning to engine control”, Ch12 of “Self-tuning and adaptive control: theory and applications” (book, Eds: C. J. Harris ad S. A. Billings), Instt. Of Electrical Engrs. (1981).

R. L. Morris, H. G. Hopkins and R. H. Borcherts, “An identification approach to throttle torque modeling”, Soc. Of Automotive Engrs., paper # 810448.

T. I. Mina, “A detailed study of the start and run-up behavior of a multi-cylinder direct injection diesel engine”, Inst. Of Mech. Engrs. Paper # C372/011, 1989.

Paul C. Krause, Analysis of Electric Machinery, McGrawHill, 1987.

P. Kundur, “Power System Stability and Control”, McGraw-Hill, Inc.

S. Haddad and N. Watson, “Principles and Performance in Diesel Engineering”, Chichester [West Sussex] : Ellis Horwood, 1984.

Y. W. Choe and B. G. Jung, “An H∞ controller design for the speed control of large size and low speed diesel engine,” Proceedings of the SICE Annual Conference, pp. 747-752, 1994.

Bo Kuang, Youyi Wang, Yoke Lin Tan, “An H∞ controller design for Diesel Engine System”, IEEE Transactions on Energy Conversion. 2000.

S. Roy, O. P. Malik and G. S. Hope, “A Low Order Computer Model for Adaptive Speed Control of Diesel Driven Power-Plants”, IEEE Transactions on Energy Conversion, pp. 1636-1642, 1991.

Yasser Yacoub, “Mean Value Modeling and Control of A Diesel Engine Using Neural Networks”, Ph.D. Dissertation, West Virginia University, 1999.

Schaefer Richard and Kiyong Kim. “Excitation control of the synchronous generator”, IEEE Industry Applications Magazine, Vol 7, no 2, pp. 37-43, March-April 2001.



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