Transmission expansion programme for electric network reinforcement
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Date
2019-03
Authors
Oluseyi, P.O.
Ajekigbe, T.O.
Akintunde, T.J.
Journal Title
Journal ISSN
Volume Title
Publisher
Faculty of Engineering University of Maiduguri, Maiduguri- Nigeria
Abstract
Due to the increase in electricity demand, transmission sector has
become overstressed since it can only be built at vast cost. In many
developing economies, the network is highly susceptible to outages, collapse as well as partial or total failures, since the existing
transmission capacity limit is often closely approached. To overcome
this challenge better transmission expansion needs to be considered. This paper identified the implementation of transmission expansion
with a number of creative approaches for overcoming network collapse
in poor economy. The study deployed the application of improved
Strength Pareto Evolution Algorithm (SPEA-2) optimization approach
for solving the transmission expansion problem based on a simple
power flow model. This model was deployed for running the Nigeria- 31-bus system; to serve as the benchmark hence the standard IEEE 30- bus system was also considered. Using the traditional approach, the
results obtained from the power flow analysis revealed that there are
four major buses that recorded very high severity of violation. These
were Jos, Kaduna, Kano and Birnin-Kebbi buses. In furtherance to this, additional effort was made to establish these findings by adapting the
contingency analysis tests which provided more information on the
earlier results so as to establish that these buses made the adjoining
transmission lines connecting them to be identified as weak. Thus this
serves as the contributory factor to the violation experienced by the
entire the power network. For a more creative vivid display of the
results; the Powerworld software was engaged for the analysis of the
existing Nigeria-31 bus system while the violated buses that require
more energy flow were provided with double circuit. This, thus, resulted
in improved power outflow and inflow to the buses which led to the
reduction of losses in the network. In conclusion, this study established
that the transmission line connecting the geographical northern and
southern parts of Nigeria dissipated quantifiably large value of losses
which is mainly due to the nature and length of the line linking the
source of electricity supply to a number of the load centres in the
farther part of the country. Hence, it is suggested that the transmission
expansion programme should be adopted for the improvement of
power flow quantity which will, on the long run, reduce the power loss
suffer by the existing network
Description
Keywords
electricity; transmission expansion; power grid; evolutionary algorithm; voltage collapse; power flow
Citation
Oluseyi, et al. Transmission expansion programme for electric network reinforcement. AZOJETE, 15(1):77-96. ISSN 1596-2490; e-ISSN 2545-5818, www.azojete.com.ng