Improving the Control of a Synchronous Generator at Kpong Hydroelectric Generating Station Using SCADA and PLCs

Christian Kwaku Amuzuvi, F. Atanga

Abstract


Large synchronous electric generators are critical components of every electric power plant and hydroelectric power plants are no exception. Even though faults seldom occur in generation stations as compared to transmission and distribution substations, one incident of fault in the generator has a greater impact. In order to protect the generator from both external and internal faults, digital generator control and protection is required. While protection and control systems operate together, this research chose to zoom-in on the control aspect of the Synchronous Generator (SG). This paper proposes a modern control system for the control of a SG at the Kpong Hydroelectric Generating Station (HGS). A Simulink version of Matlab was used to model the Kpong generating unit connected to an infinite bus and simulated. Results of the behaviour of the power system when a three phase to ground fault occurred had been established. Finally, a modern control system for SG control, incorporating Supervisory Control and Data Acquisition (SCADA) and Programmable Logic Controllers (PLCs) has been suggested for the Kpong HGS, demonstration using the winTR SCADA software and RSLogix micro PLC software on hydro generator active power control and control actions that take place when stator/core temperatures go beyond some acceptable levels.


Keywords


Data Acquisition, Programmable Logic Controllers, Synchronous Generator

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References


Anon. (2005), “Aerospace – Characteristics of Aircraft Electrical Systems”, ISO 1540, Vol. 12, Issue: 3, pp. 255 – 258.

Anon. (2012), “FFC Report- Public Utilities Regulatory Commission”, www.purc.com.

gh/purc/sites/default/files/ffcreport.pdf. Accessed: October 25, 2015.

Anon. (2015), Tips for selecting the right SCADA system for your needs, www.wonderware.com. Accessed on: June 1, 2017.

Ayensu, E. S. (2013), Lake of Life: Celebrating 50 years of the Volta River Authority, Bruce Marshall Publishers, Portugal, 220 pp.

Erceg, G., Erceg, R. and Idzotic, T. (2015), “Using Digital Signal Processor for Excitation System of Brushless SG”, Proceedings of the 25th Annual Conference of the IEEE, Vol. 3, Issue 29.

Ghazizadeh, M. S. and Hughes, F. M. (2014) “A Generator Transfer Function Regulator for Improved Excitation Control”, IEEE Transactions on Power Systems, Vol. 13, Issue 2, pp. 56 – 67.

Gizi, A. J. H., Mustafa, M. W., Zaidi, K. M. A. and Al-Zaidi, M. K. J. (2015), “Integrated PLC-Fuzzy PID Simulink Implemented AVR System”, Electrical Power and Energy Systems, Vol. 69, pp. 313 – 326.

Glavitsch, H. (2011), “Automation and Control of Electrical Power Generation and Transmission Systems”, Control Systems, Robotics and Automation, Vol. XVIII, pp. 1 – 10.

Ivanic, B. (2013), “AVR for a SG with a Six-Phase PM Alternator and Rotating Excitation System”, MSc Thesis Report, Uppsala University, Uppsala, 97 pp.

Kaur, H. and Gill, H. S. (2014), “Automation of 11 kV Substation using PLC and SCADA at GNDEC, Ludhiana: A Case Study”, International Journal of Engineering Research and Technology, Vol. 3, Issue 11, pp. 947 – 950.

Kim, Y. S., Park, Y. Y., Lee, K. M., Lee, H. J., and Park, C. W. (2015), “Modeling and Fault Simulation of Generator Control System using PSCAD/EMTDC”, International Conference on Power Systems Transients, Cavtat, Croatia.

Kumar, G., Gite, V., Gulame, P. and Karodi, S. M. (2015), “PLC Based Automatic Excitation Control of SG”, International Journal for Scientific Research and Development, Vol. 3, Issue 04, pp. 182 -184.

Kundar, P. (2011), Excitation Systems, Chapter 8 in Power System Stability, McGraw-Hill, Inc, pp. 315-377.

Lima, C., Grau, A., Joao, M. and Martínez, H. (2015), A Matlab/Simulink framework for PLC controlled processes, Available at: www.intechopen.com; Accessed on: March, 19, 2017.

Nise, N. S. (2011), Control Systems Engineering, John Wiley and Sons, Sixth Edition, California State Polytechnic University, Pomona, 926 pp.

Paserba, J. J, Shimomura, M., Tanaka, S., Shoup, D. J. and Hellested, R. T. (2002), “Enhanced Generator Controls for the Improvement of Power System Voltage Stability”, Symposium of Specialists in Electric Operational and Expansion Planning, pp. 1 – 13.

Peacock, I. and Mahoney, K. (2011), “The ABCs of Small Hydro Upgrade and Automation”, Industry Application, Available at: www.IA08303003E.pdf.com, Accessed on: November 26, 2016.

Petruzella, F. D. (2011), Programmable Logic Controllers, McGraw Hill Publishers, New York, 4th ed., pp 414.

Subramanian, R. V., Gowthaman, M. and Ezhamparithi, R. (2015), “Automatic Control of Alternator Parameters in a Power Station Using PLC”, Students Journal of Electrical and Electronics Engineering, Vol. 1, Issue No. 1, pp. 32 – 36.

Ula, A. and Hasan, A. R. (2013), “Design and Implementation of a Personal Computer Based Automatic Voltage Regulator for a SG”, IEEE Transactions on Energy Conversion, Vol. 7, Issue 1, pp. 19 – 26.

Vasudevan, K., Rao, G. S. and Rao, P. S. (2006), “Electrical Machines II”, Available at: www.synchronousmachines.pdf.com, Accessed on: November 20, 2016.

Vedrana, J., Kresimir, M. and Zeljko, S. (2010), “Excitation System Models of Synchronous Generator”, Available at: www.475822.Final_paper_SiP2010_Jerkovic.com, Accessed on: November 27, 2016.

Xiangfei, M. (2005), “Digital Generator Control Unit for Synchronous Brushless Generator”, MSc Thesis Report, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, 172 pp.


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