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All Journal Journal of Electrical Technology UMY Borobudur Engineering Review
Lawal, Muyideen Olalekan
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Automotive Engineering Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Library & Information Science Mechanical Engineering

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Real-Time Monitoring of a PV-Based Solar Power System in a South-Western Nigerian City using LABVIEW Lawal, Muyideen Olalekan; Olaniran, Olakunle; Olaniyi, Babatunde Zaccheus
Borobudur Engineering Review Vol 3 No 2 (2023): Industrial product applications
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/benr.8422

Abstract

Understanding what is obtainable from a PV-based solar power system is key to proper sizing of the system. The parameters that are important are the time range available for energy delivery from the panel, time at maximum charging current and the available charging current. To determine these parameters, this work sets up a complete PV-based solar system that was interfaced with National Instrument myDAQ (NI myDAQ) and LABVIEW program for data collection for a specific period of time. The collection periods were nineteen (19) days which cuts across days in September to November. The data collected are the time stamps, charging current and battery voltage. The study outcome reveals that the average time range for the delivery of energy from the solar module for those periods are 7:24 am to 5:31 pm. The average time at maximum charging current is 12:32 pm. The maximum charging current recorded is 0.509 A, which is 89.3 percent of the panel’s current at maximum power.
A Simple Approach to Incorporating STATCOM into a Newton-Based Power Flow and Optimal Power Flow Algorithms Lawal, Muyideen Olalekan
Journal of Electrical Technology UMY Vol. 7 No. 1 (2023): June
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jet.v7i1.17957

Abstract

Incorporating STATCOM into existing power flow (PF) or optimal power flow (OPF) algorithm usually requires the development of complex program codes to represent associated derivatives introduced by STATCOM power flow models. This procedure is time consuming as it may require various corrections of errors before having a suitable program that effectively solves the problem. To avoid this stress, an efficient way of incorporating STATCOM’s power flow models into an existing Newton-based PF and OPF algorithm is presented in this paper. These models introduce the magnitude and angle of the STATCOM’s source converter’s voltage as a state variable into the PF and OPF problem formulations. This work simply treats the STATCOM as a PV-bus with zero real power in existing PF and OPF algorithms. The proposed procedures were applied to a 5-bus test system and the results obtained were validated with similar works available in open literature. After a satisfactory performance, it was further applied to the 30-bus and 57-bus IEEE test systems. The results obtained show the effectiveness of the proposed procedures in voltage profile improvement. For example, the PF results show that the voltage magnitudes of the two buses with STATCOM in the 30-bus system were improved from 0.9881 pu and 0.9702 pu to 1.027 pu and 1.041 pu, respectively. Also, the OPF results show that the voltage magnitudes of the three buses with STATCOM in the 57-bus system were improved from 1.063 pu, 0.90 pu and 0.9683 pu to 1.039 pu, 0.9796 pu and 1.0144 pu, respectively.
Contingency Analysis of Pre- and Post-Privatization of Nigerian Electric Power System Security Lawal, Muyideen Olalekan; Umoh, Emmanuel Casmier; Odofin, Olajide
Journal of Electrical Technology UMY Vol. 9 No. 2 (2025): December
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jet.v9i2.28296

Abstract

This study evaluates the steady-state contingency performance of the Nigerian 330 kV transmission network before and after the 2013 privatization by reconstructing selected system topologies between 2003 and 2023 and analysing them using Power System Simulator for Engineering (PSSE). During this period, the grid expanded from 24 buses, 37 lines, and 7 generating stations to 52 buses, 84 lines, and 31 stations. Load flow and N-1 contingency simulations were conducted, with contingencies ranked based on thermal overloads, voltage violations, and convergence behaviour. Results show marked improvements in system security, with power-flow violations decreasing from 126 to 21, voltage-limit breaches from 351 to 4, and total violations from 522 to 31, indicating enhanced stability and efficiency in the post-privatization era. Despite these gains, the number of non-convergent cases rose from 4 to 12, reflecting operational challenges associated with network growth. Persistent convergence problems in the Shiroro–Kaduna corridor and new vulnerabilities in the Makurdi–Jos and Jos–Kaduna corridors were identified, while voltage issues in the North-East were linked to the Gombe–Damaturu–Molai lines. A strengthened grid configuration with additional corridors and reactive support is proposed to mitigate the remaining weaknesses and improve overall system robustness.
Co-Authors Odofin, Olajide Olaniran, Olakunle Olaniyi, Babatunde Zaccheus Umoh, Emmanuel Casmier