Abstract:
This research presents the characterization of electricity use pattern conducted in
Dangote Cement Plant (DCP), located in Obajana, Kogi state, Nigeria. This study
utilized the concept of specific energy consumption (SEC) as an index for measuring
and characterizing electricity use pattern in Dangote cement factory. The potential
loading of the cement factory for optimal supply side load management on the Nigeria
national grid was also evaluated by analyzing the effects of the factory peak load on the
national and determining the factory’s generator surplus that can be fed into National
grid while considering its cost implication. Power flow analysis was carried out on an
integrated network of the Dangote cement plant with the national grid via the nearest
bus therein Geregu bus using Newton Raphson algorithm on NEPLAN toolbox. The
effect of this integration was investigated in terms of voltage stability and transient
stability for various contingencies. The model showed the SEC of the plant to be within
80-120 kWh/ton. The load profile showed that the maximum load of the plant for year
2016 was 148.76 MW, with the average load at 67.30 MW and minimum load of 10.28
MW. The estimated annual income stands at ₦ 680,121,297.83 for the daily reserve
capacity of 914 MWh at unit electrical energy cost of 18 ₦/kWh with a break even period
of 3 years and 10 months should the plant decide to export energy to the national grid.
The swing curve indicates that the grid transfer capability is 193.5% of the total grid
load at 74.87% voltage profile. The results obtained from this work provides a useful
guide on possible actions that could be taken by the management to ensure optimal
performance at the factory while also giving relevant information that are useful for
decision making by economic stakeholders and investors regarding the sector for policy
making in case of future design and implementation.
