Research Publications (Engineering and Built Environment)
Permanent URI for this collectionhttp://ir-dev.dut.ac.za/handle/10321/215
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Item Optimization of university campus microgrid for cost reduction: a case study(Trans Tech Publications, Ltd., 2022) Akindeji, Kayode Timothy; Tiako, Remy; Davidson, InnocentThis paper presents an optimization model to minimize the fuel cost and CO2 emision on university campuses using an hybrid power system (HPS). The HPS is made up of solar photovoltaic (PV), diesel generator (DG), wind turbine (WT) and battery energy storage system (BESS). Two university campuses are used as case study to investigate the efficiency of the proposed HPS. The objective function is formulated such that each campus load is met by the renewable energy source (RES) when available and the DG only swicthes on when the output of the RES is not eneough to meet the load. The resulting non linear optimization problem is solved using a function in MATLAB called “quadprog”. The results of the simulation are analyzed and compared with the base case in which the DG is used exclusively to meet the entire load. The results show the effectiveness of the optimized HPS in saving fuel when compared to the base case and reflect the effects of seasonal variations in fuel costs.Item Application of AI for frequency normalization of solar PV-thermal electrical power system(IEEE, 2020-08) Estrice, Milton; Sharma, Gulshan; Akindeji, Kayode Timothy; Davidson, Innocent EwaenGrid-connected solar-PV schemes have become a significant part of the energy balance in the power system to satisfy the growing request for clean, affordable energy. This study attempts to link solar-PV generation with conventional thermal power plants and to integrate the control zone resulting in a hybrid solar PV-thermal electric power system using an AC tie line. An analysis of the frequency dynamics for varying load conditions of the interconnected system is studied. Diverse approaches of proportional, integral, and proportional-integral fuzzy logic built controllers are design and tested in order to match the electric power with variable loads of the system and hence to normalize the frequency ofthe system in shortest possible time. A comparative analysis of the design topologies is conducted out for the PV-Thermal scheme. Results obtain from the implementation are shown to justify the performance of proposed control efforts, using MATLAB software toolItem Voltage stability enhancement studies for distribution network with installation of FACTS(IEEE, 2020-08) Masikana, Sboniso B.; Sharma, Gulshan; Akindeji, Kayode Timothy; Davidson, Innocent E.Voltage stability studies and to maintain the Oat voltage profile is quite important in order to maintain the healthy operation of electric power network as wen as to provide the quality and cheap electric energy to the modern power USH S. Further with the advancement of power electronics technologies and its application to design flexible alternating current trans mission devices (FACTS) have made it easier to alleviate the voltage stability problem in a quicker and cheaper way in the modern DNs. Hence, the present research work shows an attempt to investigate and solve the problem of voltage instability in distribution network (DN). All buses and lines are calculated in terms of voltage stability index (VSI) and to identify the optimal location of FACTS. The bus or line with minimum voltage profile in terms of VSI are more sensitive to the voltage collapse and it may further lead to blackouts. The FACTS are permanently installed at the weakest point to enhance voltage profile and improve the voltage stability in the ON. The present study is test on standard IEEE--1 5 bus DN and application results are shown to verify the feasibility of t he present studies for DN