Economic Load Dispatch on a 132 kV Line with Service Potential Transformer Substations: A Case Study of Juja-Rabai Line.
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Abstract
Power outages have created significant challenges for power system networks, particularly in developing countries where the electricity demand continues to rise without a corresponding increase in power generation or the expansion of transmission and distribution networks. In Kenya, while there is a well-established transmission line network, the distribution infrastructure remains inadequate for supplying electricity to end consumers. This paper examines the economic load dispatch (ELD) of power system networks utilizing Service Potential Transformer (SPT) substations to provide electricity to villages located near high voltage (HV) lines. The ELD analysis was conducted to identify the optimal economic power output from the Kipevu, Rabai, and Thika thermal power plants, addressing the demand for both conventional and non-conventional substations. A gradient method was employed to calculate the ELD for these three generating units, and the results were validated using the PowerWorld simulator. Findings indicated that the three generators supplied 20 MW, 37.5 MW, and 12.5 MW, respectively. The results obtained from the gradient method are consistent with those obtained from PowerWorld software. Additionally, this study projected an annual fuel cost savings of USD 17,695.20 when ELD was implemented, compared to a scenario of equal load distribution among generating units. Over a ten-year period, these savings would be sufficient to establish a conventional distribution substation to meet the power demands of villages located further away from high voltage lines.
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References
C. L. Wadhwa, Electrical Power Systems. New Academic Science Ltd., 2012.
O. Mogaka, R. Orenge, and J. Ndirangu, “Static Voltage Stability Assessment of the Kenyan Power Network,” Journal of Electrical and Computer Engineering, vol. 2021, pp. 1–16, Feb. 2021. https://doi.org/10.1155/2021/5079607. DOI: https://doi.org/10.1155/2021/5079607
M. Moner-Girona et al., “Decentralized rural electrification in Kenya: Speeding up universal energy access,” Energy for Sustainable Development, vol. 52, pp. 128–146, Oct. 2019. https://doi.org/10.1016/j.esd.2019.07.009. DOI: https://doi.org/10.1016/j.esd.2019.07.009
H. J. S. Sungu, “Analysis of the network performance and development of electricity transmission,” The University of Nairobi, Nairobi, 2021. DOI: https://doi.org/10.1109/PowerAfrica52236.2021.9543132
S. A. Oketch, “Static voltage stability assessment of Nairobi area power distribution network,” Jomo Kenyatta University of Agriculture and Technology, 2015.
M. J. Saulo, “Penetration level of un-conventional rural electrification technologies on power networks,” University of Cape Town, 2014.
R. G. Gomez, A. S. Solano, and E. A. Acosta, “Rural electrification project development, using auxiliary service voltage transformers. Location of Tubares, Chihuahua, Mexico,” 2010, Calgary.
D. Xu, N. S. Powers, and W. Sae-Kok, “Development of a power source for rural electriciation,” in 2015 IEEE Global Humanitarian Technology Conference (GHTC), IEEE, Oct. 2015, pp. 340–347. https://doi.org/10.1109/GHTC.2015.7343994. DOI: https://doi.org/10.1109/GHTC.2015.7343994
D. A. Wallace, “ Development of method for providing simultaneous metering accuracy and power output from a dual secondary station service voltage transformer,” Mississippi State University, 2020.
J. M. Kitheka, “The penetration level of ASVT substation on a power network for rural electrification,” in Kabarak University 5th Annual International Conference, 2015.
K. Nithiyananthan, R. Sundar, G. Tamilselvan, L. SathishKumar, and M. SaravanaPrabu, “Economic load dispatch estimation for a three phase power system network in cloud computing environment,” International Journal of Pure and Applied Mathematics, vol. 118, no. 20, pp. 1291–1298, 2018.
S. K. Mishra and S. K. Mishra, “A Comparative Study of Solution of Economic Load Dispatch Problem in Power Systems in the Environmental Perspective,” Procedia Comput Sci, vol. 48, pp. 96–100, 2015. https://doi.org/10.1016/j.procs.2015.04.156. DOI: https://doi.org/10.1016/j.procs.2015.04.156
M. Suman, M. V. Gopala Rao, A. Hanumaiah, and K. Rajesh, “Solution of Economic Load Dispatch problem in Power System using Lambda Iteration and Back Propagation Neural Network Methods,” International Journal on Electrical Engineering and Informatics, vol. 8, no. 2, pp. 347–355, Jun. 2016. https://doi.org/10.15676/ijeei.2016.8.2.8. DOI: https://doi.org/10.15676/ijeei.2016.8.2.8
T. Pavani, T. S. S. Sarvani, and G. V. A. Rao, “Economic Load Dispatch Solution Using Teaching Learning Optimization,” IRE Journals, vol. 4, no. 11, pp. 168–173, 2021.
V. Karthikeyan, S. Senthilkumar, and V. J. Vijayalakshmi, “A New Approach to the Solution of Economic Dispatch Using Particle Swarm Optimization with Simulated Annealing,” International Journal on Computational Science & Applications, vol. 3, no. 3, pp. 37–49, Jun. 2013. https://doi.org/10.5121/ijcsa.2013.3304. DOI: https://doi.org/10.5121/ijcsa.2013.3304
J. M. Kitheka, P. M. Moses, A. M. Nyete, and N. O. Abungu, “Voltage Profile Analysis of 132kV Transmission Line Using PowerWorld Simulator: A Case Study of Juja-Rabai Line,” American Journal of Electrical Power and Energy Systems, vol. 11, no. 4, pp. 79–86, 2022.
A. Saghafinia, MATLAB - Professional Applications in Power System. InTech, 2018. doi: 10.5772/intechopen.68720. DOI: https://doi.org/10.5772/intechopen.68720
H. Saadat, Power System Analysis. McGraw-Hill, 2009.
A. B. M. Nasiruzzaman, “A Student Friendly Toolbox for Power System Analysis Using MATLAB,” in Matlab - Modelling, Programming and Simulations, E. P. Leite, Ed., InTech, 2010, ch. 4, pp. 67–86.
J. D. Glover, M. S. Sarma, T. Overbye, and A. Birchfield, Power System Analysis and Design, SI Edition. Cengage, 2022.
D. Das, Electrical Power Systems. New Age, 2007.
K. Joel Mwithui, D. Murage, and M. J. Saulo, “Techno-Economic Comparative Assessment of Asvt Versus Conventional Sub-stations for Rural Electrification,” American Journal of Electrical Power and Energy Systems, vol. 5, no. 2, pp. 11–16, 2016. https://doi.org/10.11648/j.epes.20160502.11. DOI: https://doi.org/10.11648/j.epes.20160502.11
J. M. Kitheka, “Determination of the maximum penetration level of Auxiliary Service Voltage Transformer Sub-stations on 132kV Transmission Network,” Jomo Kenyatta University of Agriculture and Technology, 2017.