Browsing by Author "Ogunbiyi, O"

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    Enhancement of the Nigerian National Grid Performance with a FACT Compensator
    (Department of Chemical Engineering, Faculty of Engineering, University of Benin, Benin., 2022-12-30) Ogunbiyi, O; Adesina, L. M; Ugwute, F. O; Thomas, C. T
    The Nigerian grid is faced with loss of lines and system collapse due to overloads, under-loads, and inadequate reactive power at the buses. Analysis of the power flow supported by the static voltage stability condition of the system provides an insight to the system performance indicators like voltage profile, power flows, and losses. Voltage control and power loss reduction strategies are still based on mechanical methods such as synchronous generators/condensers, tap changing of transformers, switching of shunt reactors and capacitor banks, switching of transmission lines, generating unit scheduling, and manual load shedding. However, a flexible alternating current transmission system (FACT) such as the static VAR compensator offers flexible and fast control of power system operations unlike the mechanically switched devices which are restricted by wear and tear and slow response. Hence this work demonstrates the use of static voltage analysis in seeking the optimal placement of the static volt-ampere reactance (VAR) compensator called (SVC) on the power system. This idea was tested using the transmission Company of Nigeria (TCN) 330 kV-bus system that was modeled and analyzed using NEPLAN software and the results showed substantial improvement in the voltage profiles and loss reduction. Simulations of the peak condition showed that 9 stations violated the set limits. It is recommended that FACTS devices be optimally located at Sakete (6°44′11″N 2°39′29″E) bus bars for effective transmission of electric power on the grid.
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    Reliability Indices of Electric Power Distribution System in Ilorin, Nigeria
    (Department of Chemical Engineering, Faculty of Engineering, University of Benin, Benin, 2020-06-30) Ogunbiyi, O; Akomolafe, T; Adesina, L. M
    The failure probability and epileptic power supply is a pointer to the reality that there is a need for reliability studies and fault evaluation of the electric power system in Nigeria. The recent blackout faced in the country has paralyzed many activities and has destroyed many industrial processes. Therefore, it is worth considering reliability assessments as it provides an opportunity to incorporate the cost or losses incurred by the utility customer as a result of a power failure and this must be considered in planning and operating practices. The reliability assessment and estimation of indices were carried out on selected 11 kV injection substations' feeders in Ilorin, Nigeria. Using the analytical method and network reduction technique, the substation reliability was analyzed based on recorded outage data. Results show the low level of reliability of power supply to customers on the feeder, the failure rate is quite on the high side and a low system average interruption frequency index was recorded on most feeders. The overall system availability shows that the system needs improvement and quick response to network failure.