Implication of Using Auxiliary Service Voltage Transformer Sub-Stations for Rural Electrification
International Journal of Energy and Power Engineering
Volume 4, Issue 2-1, March 2015, Pages: 1-11
Received: Nov. 10, 2014; Accepted: Nov. 13, 2014; Published: Nov. 19, 2014
Views 3348      Downloads 228
Michael Juma Saulo, Electrical Department. Technical University of Mombasa, Mombasa, Kenya
Charles Trevor Gaunt, Electrical Department. University of Cape Town, Cape Town, South Africa
Article Tools
Follow on us
Providing an affordable and reliable electricity supply to rural communities is seen by countries round the world as one of the major keys to development. A good quality and stable electricity supply can provide a wide variety of benefits including lighting (allowing evening activities), clean cooking and heating, access to television/radio, telephone (including mobile), improved health (due to example refrigeration), and many small industrial uses. Often this can be provided by extending the main electricity network to the community. However, for remote rural areas the costs involved can be very high. Therefore, Un-conventional Rural Electrification (URE) technologies are thus very relevant, particularly for countries in sub-Saharan Africa (SSA), as they have potential to make connection to the electricity network affordable. While such systems are already in use, their penetration level is very low. Hence, if the penetration level of such system in power network increases, what is the effect on power and voltage quality, stability and capacity constraints of the overall system? What are the limiting factors, and how can this limit be determined for any particular rural electrification project. These are some of the major questions that this paper address progressively. The paper investigated the maximum penetration level of sub-station based Auxiliary Service Voltage Transformer (ASVT) technologies in transmission power networks with regard to voltage quality, stability, and capacity constraints. This was done by comparing the simulation results of ASVT(s) penetration on a transmission power network with the constructed Surge Impedance Loading (SIL) curves. The curves were derived from the ABCD parameters of the transmission line under investigation. Results showed that ASVT sub-station technologies can be applicable to any HV transmission line whose voltage level is within the 6% tolerance when the load power factor is varied between 0.2 and unity power factor. Moreover, the Loadability tests carried out showed that ASVT system could be operated within allowable voltage profile, if 1MW at 0.3 to 0.5 power factor lagging load was connected.
Auxiliary Service Voltage Transformers (ASVTs), Maximum Penetration Level, Sub-Saharan Africa, Loadability Test, ABCD Parameters, Surge Impedance Loading
To cite this article
Michael Juma Saulo, Charles Trevor Gaunt, Implication of Using Auxiliary Service Voltage Transformer Sub-Stations for Rural Electrification, International Journal of Energy and Power Engineering. Special Issue: Electrical Power Systems Operation and Planning. Vol. 4, No. 2-1, 2015, pp. 1-11. doi: 10.11648/j.ijepe.s.2015040201.11
Pasand, M.S., Aghazadeh, R., (2003).Capacitive Voltage Substations Ferro resonance Prevention using power electronicsdevices International conference on power system transients- IPST 2003 in New Orleans.
Gomez, R.G., Solano, A.S., Acosta, E.A., (2010): Rural Electrification Project Development, Using Auxilliary Transformers. Location of Tubares, Chihuahua, Mexico. CIGRE C6-305- 2010 working group (Coll 2010) “Rural Electrification” Calgary.
Arteche Instrument transformer manual (2010): ASVT – 245 and ASVT 145 Manuals and technical brochures.
Saulo, M.J., Gaunt C.T., and Mbogho, M.S., (2012): Comparative Assessment of Capacitor Coupling Sub-station and Auxiliary Service Voltage Transformer for Rural Electrification 2nd annual Kabarak international conference at Kabarak University 16th -18th October 2012 Nakuru, Kenya.
Barnes, D.F., (2007): The challenge of Rural Electrification: Strategies for developing countries. Vol 3 pp1-18 Washington DC.
Wilson, R. E., Zevenbergen G. A., Mah, D.L., Murphy, A. J., (1999): Calculation of transmission line parameters from synchronised measurements Taylor and Francis,Vol 27, pp1269-1278, 1999.
Bell, S.C., Bodgers P.S., (2007) Power Transformer Design Using Magnetic Theory Finite Element Analysis-Comparison of Techniques Proceeding of AUPEC 2007 Perth, Western Australia 9-12 December 2007.
Grainger J.J., and Stevenson W.D., (1994): Power System Analysis, Singapore: McGraw Hill 1994, pp 141-233.
Margueron, X., Keradec, J.P., (2007): Design of equivalent circuit and characterization strategy of n-input coupled inductors. IEEE Transactions on Industry Applications Jan- Feb 2007, vol 43, Issue 1, pp14-22
McLyman, W.N., (2004): TransformerInductor and Design Handbook, 3rd edition, 2004.Dekker, New York, USA,
Paul, C.R., Nasar, S. A., Unnewehr, L.E., (1986): Introduction to Electrical Engineering McGraw-Hill, Singapore, 1986.
Wadhwa,High Power system analysis and applications, The Electricity Authority of New South Wales, Fourth Edition, June 2010.
Anderson, G.O., Yanev, K., (2010): Non-Conventional Sub-station and Distribution System for Rural Electrification. 3rd IASTED Africa PES 2010, Gaborone, Botswana, September 2010.
Science Publishing Group
1 Rockefeller Plaza,
10th and 11th Floors,
New York, NY 10020
Tel: (001)347-983-5186