Jump to ContentJump to Main Navigation
Show Summary Details
More options …

Electrical, Control and Communication Engineering

The Journal of Riga Technical University

2 Issues per year

Open Access
Online
ISSN
2255-9159
See all formats and pricing
More options …

Control of Electric Drives in the Best Efficiency Region of Pumping System

Ilja Bakman
Published Online: 2014-10-23 | DOI: https://doi.org/10.2478/ecce-2014-0014

Abstract

The paper concentrates on improving the efficiency of the pumping system in which pumps are run by variable speed drives. The method is applicable to system consisting of several centrifugal pumps. Problems arising from running the pumps outside the optimal efficiency region are discussed. Common principles of operation and control of typical boosting pumping station are represented. Methods of regulation of productivity of the system are described. The proposed method is based on prediction of future efficiency of pumps before making adjustments of pumping system productivity. The proposed method is basing on tracking the working point of pump on efficiency graph. Monitoring the location of working point vs. efficiency graph enables to evaluate its current and future distances from the best efficiency point of the pump. Knowing the current number of running pumps it is possible to predict the location of working point after adjustment of productivity of the system. Ability to predict the increase or decrease of efficiency enables to enhance the adjustment of productivity of the system. Methods of graphical analysis of working state of the pumping system are representing topic for future research.

Keywords: Fluid flow control; Pumps; State estimation; Variable speed drives

References

  • [1] Iea Report 2009, Iea Statistics, Co2 Emissions from fuel combustion.Google Scholar

  • [2] I. I. Ionel, Pumps and Pumping with Particular Reference to Variable-Duty Pumps, Amsterdam: Elsevier, 1986, p. 715.Google Scholar

  • [3] V. Vodovozov, I. Bakman. (2013), “Slip Compensation in Sensorless Scalar Electric Drive of a Pump,” 54th International Scientific Conference of Riga Technical University. Riga: Riga Technical University, 2013, pp. 27.1–27.4.Google Scholar

  • [4] T. Ahonen. Monitoring of Centrifugal Pump Operation by a Frequency Converter, Doctoral Thesis, Lappeenranta University of Technology, 2011, p. 134.Google Scholar

  • [5] L. Szychta, “Analysis of efficiency characteristics of squirrelcage induction motor for pump applications,” 14th International Power Electronics and Motion Control Conference Epe-Pemc 2009, pp. 73 – 78.Google Scholar

  • [6] R. C. Dorf, Modern Control Systems, Prentice Hall, 2001, 831 p.Google Scholar

  • [7] I. J. Karassik and T. McGuire, Centrifugal Pumps, Ny, Usa: Chapman & Hall, 1998.Google Scholar

  • [8] M. Pechenik, O. Kiselychnyk, S. Buryan and D. Petukhova, “Sensorless control of water supply pump based on neural network estimation,” www.nbuv.gov.ua/portal/natural/emeo/2011_79/462-466.pdf.Google Scholar

  • [9] Z. Raud, V. Vodovozov and M. Egorov, “A toolbox to design and study electric drives,” 14th International Power Electronics and Motion Control Conference Epe-Pemc 2010, Ohrid, Macedonia, 2010, pp. T5-142-T5-148.Google Scholar

  • [10] V. Vodovozov, I. Bakman, “Sensorless pressure control of centrifugal pumps,” 8th International Conference-Workshop on Compatibility and Power Electronics Cpe 2013, Ljubljana, Slovenia, 2013, pp. 304–309.Google Scholar

  • [11] V. Vodovozov, I. Bakman, “Control of liquid density to prevent abnormal pumping performance,” 7th Wseas International Conference on Waste Management, Water Pollution, Indoor Climate Wwai 2013, Lemesos Cyprus, 2013, pp. 217–222.Google Scholar

  • [12] ABB Product Notes: Flow Calculation in ABB Industrial Drives, ABB, Helsinki, Finland, 2006.Google Scholar

  • [13] T. Ahonen, J. Tamminen, J. Ahola and J. Kestilä, “Frequency-converter-based hybrid estimation method for the centrifugal pump operational state,“IEEE Transactions on Industrial Electronics, vol. 59, no. 12, 2012, pp. 4803–4809. http://dx.doi.org/10.1109/TIE.2011.2176692Web of ScienceCrossrefGoogle Scholar

  • [14] Z. Raud, V. Vodovozov, T. Lehtla and E. Pettai, “Simulation tools to study power electronics,” 13th European Conference on Power Electronics and Applications Epe 2009, Barcelona, Spain, 2009, paper 0013.Google Scholar

  • [15] F. Abrahamsen, F. Blaabjerg, J. K. Pedersen, P. Z. Grabowski and P. Thøgersen, “On the energy optimized control of standard and high efficiency induction motors in Ct and Hvac applications,” IEEE Transactions on Industrial Applications, v. 34, n. 4, 1998, pp. 822–831. http://dx.doi.org/10.1109/28.703985CrossrefGoogle Scholar

  • [16] ABB, Technical Guide No. 1: Direct Torque Control, ABB, Helsinki, Finland, 2002.Google Scholar

  • [17] IEC 60034-2-1: Rotating Electrical Machines – Part 2–1: Standard Methods for Determining Losses and Efficiency from Tests (Excluding Machines for Traction Vehicles), 2007.Google Scholar

  • [18] P. Girdhar, Centrifugal Pumps, Design, Operation and Maintenance, London: Elsevier, 2005, p. 244.Google Scholar

  • [19] ABB, ACQ810 Firmware manual, ABB, Helsinki, Finland, 2012.Google Scholar

  • [20] I. Bakman, L. Gevorkov, V. Vodovozov, “Predictive Control of a Variable-Speed Multi-Pump Motor Drive,” 2014 IEEE 23 rd International Symposium on Industrial Electronics (ISIE 2014), Istanbul, Turkey, June 1st to 4th, 2014.Google Scholar

About the article

* Address: Tallinn University of Technology, Ehitajate tee 5, Tallinn, 19086, Estonia


Published Online: 2014-10-23


Citation Information: Electrical, Control and Communication Engineering, ISSN (Online) 2255-9159, DOI: https://doi.org/10.2478/ecce-2014-0014.

Export Citation

© 2014 Riga Technical University. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. BY-NC-ND 3.0

Comments (0)

Please log in or register to comment.
Log in