Impact of Harmonic Disturbances on the Lifespan of a Domestic Station in the City of Niamey
Daouda Abdourahimoun,
Mamadou Aissami Madou Attami,
Abba Kaga Lagare Abatcha
Issue:
Volume 12, Issue 3, May 2023
Pages:
36-40
Received:
30 May 2023
Accepted:
26 July 2023
Published:
4 August 2023
Abstract: Electrical energy is transported to consumers by means of electrical networks that are a set of infrastructures allowing the transport and distribution of this energy flow. Among these infrastructures, the MV/LV (Medium Voltage to Low Voltage) distribution transformer is one of the key elements in the distribution chain. The lifetime of transformer stations is estimated to be around 20 years under nominal operation. The aim of this scientific work is to evaluate the influence of harmonic disturbances on the lifetime of a domestic substation (Tree-Phase) in the city of Niamey. This article has made it possible to obtain on the three phase a higher temperature of the hot spot in the presence of harmonics than that recorded in the regime without harmonics (e g. 58.84°C against 57.79°C). The impact in terms of loss of life of the electrical transformer was determined to be 206.32 seconds against 178.59 seconds on phase 1. In addition, the results obtained following the evaluation of lifespan in fundamental regime have concluded that the transformer is not overloaded, but the loads placed between its terminals are unbalanced. The consequence of this imbalance will cause premature ageing of the insulating papers at the level of windings wich supply the overloaded phases. On the other hand, under harmonic conditions, currents with harmonics at the transformer terminals contribute to the ageing of the transformer.
Abstract: Electrical energy is transported to consumers by means of electrical networks that are a set of infrastructures allowing the transport and distribution of this energy flow. Among these infrastructures, the MV/LV (Medium Voltage to Low Voltage) distribution transformer is one of the key elements in the distribution chain. The lifetime of transformer...
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Analysis of the Complementarity Between Solar and Wind Energy in the Perspective of Installing a Hybrid System: Case Study in the Sahel of Burkina Faso
Ousmane Nikiema,
Seydou Ouedraogo,
Damgou Mani Kongnine,
Emmanuel Nanema,
Adekunlé Akim Salami
Issue:
Volume 12, Issue 3, May 2023
Pages:
41-46
Received:
16 July 2023
Accepted:
9 August 2023
Published:
22 August 2023
Abstract: In this study, interest is focused on the complementarity of solar and wind energy, in order to assess the profitability of a hybrid renewable energy system that can be installed at three sites located in Burkina Faso, in West Africa. An analysis of the relationship intensity that may exist between the temporal and energy variations of solar and wind sources has been carried out. The assessment of the complementarity between solar and wind energy at the studied sites is carried out using the Pearson correlation coefficient, the ratio between the annual value of wind and solar energy and coupling coefficient at the three sites. The results obtained show that the values of the Pearson coefficient are positive and almost equal to zero on the three sites. There is no correlation along the time between the quantities of the two energy sources. In addition, the positive and very close to zero values of the ratio and coupling coefficient at the three sites show that a low wind potential characterizes the studied sites. The sites studied do not present an interesting complementarity between solar and wind energies. For the studied sites Solar/wind energy hybridization is not part of a great economic interest. The study carried out shows that it is not interesting to operate a photovoltaic/wind system on these sites.
Abstract: In this study, interest is focused on the complementarity of solar and wind energy, in order to assess the profitability of a hybrid renewable energy system that can be installed at three sites located in Burkina Faso, in West Africa. An analysis of the relationship intensity that may exist between the temporal and energy variations of solar and wi...
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