Inverter-Based Diesel Generator Emulator for the Study of Frequency Variations in a Laboratory-Scale Autonomous Power System
- 1 Department of Electrical and Computer Engineering, Concordia University, Montreal, Canada
- 2 Department of Electrical and Computer Engineering, Concordia University, Montreal, Canada
Abstract
This paper presents the modeling, simulation and practical implementation of an inverter-based diesel generator emulator. The main purpose of this emulator is for the study of frequency variations in diesel-based autonomous power systems in a laboratory environment where the operation of a real diesel generator is not possible. The emulator basically consists in a voltage source inverter with a second order output filter which voltage references are given by the model of the diesel generator. The control of the emulator is based on the digital signal processor TMS 320F 2812, where the mathematical models of the diesel generator and the control of the inverter are computed in real-time. Parameters for the model were obtained from commercially available components. Experimental results for different values of speed droop showed that the emulator achieves a satisfactory performance in the transient and stationary response. For the stationary response, the measured frequency deviates from theoretical values with a mean absolute error of: 0.06 Hz for 0% droop, 0.037 Hz for 3% droop, and 0.087 Hz for 5% droop. For the transient response, the measured frequency nadir deviates from simulations in: 0.05 Hz for 0% droop, 0.02 Hz for 3% droop, and 0.1 Hz for 5% droop.
- IEEE Std. 1159-2009 (Revision of IEEE Std. 1159-1995) Recommended Practice for Monitoring Electric Power Quality, IEEE Std., 2009.
- M. Torres and L. A. C. Lopes, “Inverter-Based Virtual Diesel Generator for Laboratory-Scale Applications,” IECON 2010—36th Annual Conference on IEEE Indus trial Electronics Society, Glendale, 7-10 November 2010, pp. 532-537.
- M. Armstrong, D. Atkinson, A. Jack and S. Turner, “Power System Emulation Using a Real Time, 145 kw, Virtual Power System,” 2005 European Conference on Power Electronics and Applications, Dresden, 10-15 Sep tember 2005, 10 Pages.
- M. Oettmeier, R. Bartelt, C. Heising, V. Staudt, A. Steimel, S. Tietmeyer, B. Bock and C. Doerlemann, “Machine Emulator: Power-Electronics Based Test Equipment for Testing High-Power Drive Converters,” 2010 12th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM), Basov, 20-22 May 2010, pp. 582-588.
- I. Boldea, “Synchronous Generators Handbook,” In: L. L. Grigsby, Ed., 1 em Plus 0.5 em Minus 0.4 em, CRC Press, Boca Raton, 2006, 448 Pages.
- Y. Z. Sun, Z. S. Zhang, G. J. Li and J. Lin, “Review on Frequency Control of Power Systems with Wind Power Penetration,” 2010 International Conference on Power System Technology (POWERCON), Hangzhou, 24-28 October 2010, pp. 1-8.
- R. Cosse, M. Alford, M. Hajiaghajani and E. Hamilton, “Turbine/Generator Governor Droop/Isochronous Fundamentals—A Graphical Approach,” Petroleum and Chemical Industry Conference (PCIC), 2011 Record of Conference Papers Industry Applications Society 58th Annual IEEE, Toronto, 19-21 September 2011, pp. 1-8.
- A. J. Wood and B. F. Wollenberg, “Power Generation, Operation and Control,” John Wiley and Sons, Inc., Hoboken, 1996, 592 Pages.
- S. Roy, O. Malik and G. Hope, “A Low Order Computer Model for Adaptive Speed Control of Diesel Driven Power Plants,” Industry Applications Society Annual Meeting, 1991, Conference Record of the 1991 IEEE, Dearborn, 28 September-4 October 1991, pp. 1636-1642.
- S. Roy, “A Least-Squares Based Model-Fitting Identification Technique for Diesel Prime-Movers with Unknown Dead-Time,” IEEE Transactions on Energy Conversion, Vol. 6, No. 2, 1991, pp. 251-256. doi:10.1109/60.79629
- Technical Specification: The Genset Engine 912 Series, Deutz AG, dic 1998. http://j.mp/F4L912GEN
- H. Nikkhajoei and R. Lasseter, “Distributed generation interface to the CERTS microgrid,” IEEE Transactions on Power Delivery, Vol. 24, No. 3, 2009, pp. 1598-1608. doi:10.1109/TPWRD.2009.2021040