Browsing by Author "Tolulope O. Akinbulire"

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    Design Parameters Specification for the Construction of 33kV Overhead Lines across Lagoon Using Transmission Towers: In Recent Advances in Science and Technology Research
    (Book Publisher International., 2020-09-01) Lambe Mutalub Adesina; Tolulope O. Akinbulire
    Overhead aluminum conductors used for both medium and high voltage installations are flexible and uniform in weight along their lengths. They often take the form of catenary changes with conductor temperature, ice and wind loading, and time. Adequate vertical and horizontal clearance under all weather and electrical loading conditions are guaranteed by ensuring the breaking strength of the conductor is not exceeded. Thus, the behavior of the conductor catenary under all conditions needs to be incorporated into the transmission line in the constructional design regardless of the length of the transmission line. Overhead transmission lines constructed across water such as Lagoon are good illustrations of the characteristics described above. Therefore, this research presents a case study of 33kV overhead line construction crossing 265 m wide ‘Lagoon’ which requires Sag parameter calculations. Details description of the case study, specifications for Aluminum conductor steel reinforced (ACSR) type A1/S1A IEC 61089 standard, and sag calculations with and without wind or ice weather conditions are presented. The design calculation for weight of a required Dead-End Lattice Tower via determination of weight of the individual 5 components of a Tower are also presented. The obtained results are presented and discussed. The Sag parameter results and that of Dead-end lattice tower and its components weights evaluated were applied to the proposed project. The method of this research work generated reliable results suggesting that it can be applied to any other Transmission tower successfully.
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    Grounding Method for Reliable Operation of Power and Distribution Transformers Substations: In Emerging Issues in Science and Technology
    (Book Publisher International., 2020-06-01) Lambe Mutalub Adesina; Tolulope O. Akinbulire
    Equipment grounding is a necessary and conclusive part of an installation process in electrical power system networks particularly in power substations. Over years, grounding or earthing of substations has been carried out primarily through the preparation of an earth mat which is simply interconnected with several Earth rods buried around the substation or any other equipment under installation. Apart from the fact that this approach is old, it is in addition requires several efforts to have acceptable and reliable results. Thus, a more sophisticated, reliable, and results-oriented is required to be in place. This paper presents a modern approach to earthing of transformer substations and other allied equipment. The approach negates the constraints that are obtained in the old approach. A 15MVA, 33/11kV power transformer substation as well as a 500kVA, 11/0.415kV distribution transformer substation’s installations were selected as the case study. A flow chart that describes the procedures of carrying out the proposed modern method of earthing is developed and applied to the two case studies. The various earth resistances measured in both cases are presented and discussed. The results from the case study indicate that the earth resistance values obtained from this new approach are reliable and in compliance with IEEE Standards 80,142, 81, and 1100.