Smart Grid Design and Simulation for Goma TMK Substation Regulation
Abstract
Power distribution networks in places like Goma, Democratic Republic of Congo, face the challenges of voltage control, energy loss, and power quality because they depend mainly on manual control provided at substations such as TMK. This study proposes a smart grid solution for automated voltage regulation through On-Load Tap Changer (OLTC) control for inefficiencies stemming from the above challenges using a Programmable Logic Controller (PLC). The system utilizes real-time electrical parameters monitoring, thereby employing dynamic adjustment processes to ensure voltage levels are kept at their optimum, as well as limiting overcurrent and improving thermal stability. The hybrid simulation approach uses Siemens TIA Portal for PLC logic and MATLAB Simulink to check the system's dynamic analysis under varied loads and faults. The results proved to enhance voltage stability and operational efficiency, and robustness while minimizing human intervention. The architecture is amenable to SCADA integration and distributed energy resources for future incorporation, thus providing a scalable solution to aging grids in resource-poor settings.
Downloads
References
P. Kankonde and P. Bokoro, “Bridging the Energy Divide: An Analysis of the Socioeconomic and Technical Factors Influencing Electricity Theft in Kinshasa, DR Congo,” Energies, vol. 18, no. 13, Art. no. 3566, Jul. 2025, doi: 10.3390/en18133566.
J. M. Lukamba-Muhiya and E. Uken, “The electricity supply industry in the Democratic Republic of the Congo,” J. Energy Southern Africa, vol. 17, no. 3, pp. 21–28, Aug. 2006, doi: 10.17159/2413-3051/2006/v17i3a3261.
K. Lusimbakio, T. Lokanga, P. Sedi Nzakuna, V. Paciello, J.-P. Nsekere, and O. Tshipata, “Evaluation of the Impact of Photovoltaic Solar Power Plant Integration into the Grid: A Case Study of the Western Transmission Network in the Democratic Republic of Congo,” Energies, vol. 18, no. 3, Art. no. 639, Jan. 2025, doi: 10.3390/en18030639.
O. Savin et al., “Effect of start and stop cycles on hydropower plants: modelling the deterioration of the equipment to evaluate the cycling cost,” IOP Conf. Ser.: Earth Environ. Sci., vol. 1136, Art. no. 012057, 2023, doi: 10.1088/1755-1315/1136/1/012057.
K. Wall, “Primary causes of the condition of public sector fixed infrastructure in South Africa,” Acta Structilia, vol. 32, no. 1, Jun. 2025, doi: 10.38140/as.v32i1.9383.
J. S. Ramesh and M. C. Kokate, “On Load Tap Changer Transformer in Automatic Controlling System,” Int. J. Adv. Res. Sci. Commun. Technol., Apr. 2025, doi: 10.48175/IJARSCT-24897.
R. A. Silva-Quiñonez, H. Sánchez-Sainz, P. Garcia-Triviño, R. Sarrias-Mena, D. Carrasco-González, and L. M. Fernández-Ramírez, “Optimal Control for On-Load Tap-Changers and Inverters in Photovoltaic Plants Applying Teaching Learning Based Optimization,” Electronics, vol. 14, no. 20, Art. no. 3989, Oct. 2025, doi: 10.3390/electronics14203989.
M. T. Naz, W. Elmedany, and M. Ali, “Securing SCADA systems in smart grids with IoT integration: A Self-Defensive Post-Quantum Blockchain Architecture,” Internet Things, vol. 28, Art. no. 101381, Sep. 2024, doi: 10.1016/j.iot.2024.101381.
H. Lim, J. Jo, and K.-H. Chun, “Optimal On-Load Tap Changer Tap Control Method for Voltage Compliance Rate Improvement in Distribution Systems, Based on Field Measurement Data,” Energies, vol. 18, no. 2, Art. no. 439, Jan. 2025, doi: 10.3390/en18020439.
D. Mirindi, J. Sušnik, S. Masia, and G. Jewitt, “A system dynamics modelling assessment of water-energy-food resource demand futures at the city scale: Goma, Democratic Republic of Congo,” World Dev. Sustain., vol. 5, Art. no. 100159, Dec. 2024, doi: 10.1016/j.wds.2024.100159.
S. Kumar et al., “Exploring the spectrum: A comprehensive review of control methods in microgrid systems,” Results Eng., vol. 28, Art. no. 105470, Dec. 2025, doi: 10.1016/j.rineng.2025.105470.
“How Voltage Stabilizer Systems Protect Equipment and Improve Power Quality,” IET Africa, 2024. [Online]. Available: https: //www.ietafrica.com/how-voltage-stabilizer-systems-protect-equipment-and-improve-power-quality/. [Accessed: Feb. 10, 2026].
P. Biswas et al., “Vehicle to Grid: Technology, Charging Station, Power Transmission, Communication Standards, Techno-Economic Analysis, Challenges, and Recommendations,” World Electr. Veh. J., vol. 16, no. 3, Art. no. 142, Mar. 2025, doi: 10.3390/wevj16030142.
H. A. Abdelhamid, K. Mohamed, E.-S. I. Gaber, and K. K. Wisdom, “Monitoring volcanic gas hazards in Goma DRC using GIS and Google Earth Engine,” Discover Geosci., vol. 3, no. 1, Art. no. 189, Jul. 2025, doi: 10.1007/s44288-025-00189-4.
P. J. G. Kervyn, A. Michellier, C. Michellier, and H. Trefzger, “Goma is threatened by conflict and a volcano: We’ve created a handbook to help hotspots like these,” The Conversation, Feb. 27, 2025. [Online]. Available: https: //theconversation.com/goma-is-threatened-by-conflict-and-a-volcano-weve-created-a-handbook-to-help-hotspots-like-these-249453. [Accessed: Feb. 10, 2026].
CIGRE Working Group C1.9, “Planning issues for newly industrialized and developing countries (Africa),” CIGRE Study Committee C1, Tech. Rep., 2025.
K. P. Gershome, B. M. Olivier, T. B. J. Daudet, and T. J. Hubert, “Optimizing Electrical Energy Dispatch in Goma (DRC) Using Artificial Neural Networks,” Int. J. Sci. Res. (IJSR), vol. 14, no. 1, pp. 967–977, Jan. 2025, doi: 10.21275/SR25120191055.
J. Thompson, R. B. Ramazani, C. S. Sinai, K. K. Bindu, and P. Jagger, “Do decentralized solar mini grids improve energy access for small enterprises in Goma, Democratic Republic of the Congo?” Energy Sustainable Dev., vol. 81, Art. no. 101464, Aug. 2024, doi: 10.1016/j.esd.2024.101464.
M. Al-Muhaini and G. Heydt, “A Novel Method for Evaluating Future Power Distribution System Reliability,” IEEE Trans. Power Syst., vol. 28, no. 3, pp. 3018–3027, Aug. 2013, doi: 10.1109/TPWRS.2012.2230195.
V. Yadav, B. Singh, and A. Verma, “Robust control for improving performance of grid-synchronized solar PV-BES-wind based microgrid,” Sustain. Energy Technol. Assess., vol. 64, Art. no. 103677, Apr. 2024, doi: 10.1016/j.seta.2024.103677.
A. M. Saleh, V. István, M. A. Khan, M. Waseem, and A. N. A. Ahmed, “Power system stability in the Era of energy Transition: Importance, Opportunities, Challenges, and future directions,” Energy Convers. Manage. X, vol. 24, Art. no. 100820, Oct. 2024, doi: 10.1016/j.ecmx.2024.100820.
Y. Gui et al., “Review of Challenges and Research Opportunities for Control of Transmission Grids,” IEEE Access, vol. 12, pp. 94543–94569, 2024, doi: 10.1109/ACCESS.2024.3425272.
T. Wei, H. Li, and J. Miao, “Integration and Development Path of Smart Grid Technology: Technology-Driven, Policy Framework and Application Challenges,” Processes, vol. 13, no. 8, Art. no. 2428, Aug. 2025, doi: 10.3390/pr13082428.
T. Kataray et al., “Integration of smart grid with renewable energy sources: Opportunities and challenges - A comprehensive review,” Sustain. Energy Technol. Assess., vol. 58, Art. no. 103363, Aug. 2023, doi: 10.1016/j.seta.2023.103363.
N. Almtireen et al., “PLC-Controlled Intelligent Conveyor System with AI-Enhanced Vision for Efficient Waste Sorting,” Appl. Sci., vol. 15, no. 3, Art. no. 1550, Feb. 2025, doi: 10.3390/app15031550.
M. I. Fernandez, Y. I. Go, D. M. L. Wong, and W.-G. Früh, “Review of challenges and key enablers in energy systems towards net zero target: Renewables, storage, buildings, & grid technologies,” Heliyon, vol. 10, no. 23, Art. no. e40691, Dec. 2024, doi: 10.1016/j.heliyon.2024.e40691.
M. S. Bakare, A. Abdulkarim, M. Zeeshan et al., “A comprehensive overview on demand side energy management towards smart grids: challenges, solutions, and future direction,” Energy Inform., vol. 6, Art. no. 4, 2023, doi: 10.1186/s42162-023-00262-7.
P. Moura, G. López, J. Moreno, and A. Almeida, “The role of Smart Grids to foster energy efficiency,” Energy Efficiency, vol. 6, no. 4, p. 621, 2013, doi: 10.1007/s12053-013-9205-y.
J. Powell, A. McCafferty-Leroux, W. Hilal, and S. A. Gadsden, “Smart grids: A comprehensive survey of challenges, industry applications, and future trends,” Energy Rep., vol. 11, pp. 5760–5785, Jun. 2024, doi: 10.1016/j.egyr.2024.05.051.
L. Maretto, M. Faccio, and D. Battini, “The adoption of digital technologies in the manufacturing world and their evaluation: A systematic review of real-life case studies and future research agenda,” J. Manuf. Syst., vol. 68, pp. 576–600, Jun. 2023, doi: 10.1016/j.jmsy.2023.05.009.
D. K. Ngwashi, A. Arsene, S. G. Ndeh, and E. Tanyi, “Optimal design and sizing of a multi-microgrids system: Case study of Goma in The Democratic Republic of the Congo,” Sci. Afr., vol. 22, Art. no. e01913, Sep. 2023, doi: 10.1016/j.sciaf.2023.e01913.
A. Sina, M. Kazeminejad, and D. Kaur, “Advance Control Strategies to Enhance Stability of Islanded Microgrids under dynamic conditions,” Dec. 2025, doi: 10.21203/rs.3.rs-8348639/v1.













