SOURCE:

Faculty: Engineering
Department: Electrical Engineering

CONTRIBUTORS:

Ezeakudo, C.P.
Madueme, T. C.
Ezechukwu, O. A.

ABSTRACT:

ABSTRACT
In this dissertation, the Nigerian power system was simulated and the impact of the integration of distributed generation in it was investigated. NEPLAN analytical software was used for the simulation and in evaluating the impact of the integration of the DG on the 60-bus Nigerian grid network. The grid network was zoned into eight regions: Bauchi, Benin, Enugu, Osogbo, Kaduna, Lagos, Port-Harcourt and Shiroro and DG was installed in each region, one at a time. The effect of the installation on the grid, vis-à-vis the regions, was studied and it was compared with the grid without the DG. Without the DG, the grid network has an active power loss of 131.597MW, which is 1.25% of the total power demand of the grid. The voltage profile of many nodes violates the acceptable limits of ±10% and some lines are heavily loaded and congested, notably at Aiyede. With the integration of distributed generation units in Bauchi, Osogbo, Shiroro, Enugu and Kaduna regions, active power losses in the grid was reduced by as much as 3.333%, 4.111%, 2.055%, 1.226% and 1.166% respectively. However, active power losses reduction was very low with the installation of the units in Benin, Lagos and Port-Harcourt regions as the losses reduction were only 0.635%, 0.709% and 0.357% respectively. Thus, the integration of the distribution generation technology is best done in the Northern part of the country as depicted by Bauchi, Shiroro and Kaduna regions although it can also be deployed in the Southern part of the country but with meagre benefits. Furthermore, voltage profile improvement across the various nodes of the power system was obtained with the integration of the technology. Bauchi region had the highest improvement of 8.623% and 15.842%in the grid network and distribution network respectively while Shiroro and Kaduna regions had the least improvement with Shiroro region having 0.000% and 0.674% improvement in the grid and distribution network respectively, albeit because of the integration of reactive power compensation devices. Line flows reduction, leading to the resolution of the congested network in Aiyede was achieved as well as improvement in power quality and stability across the grid network. Transmission tie lines decongestion of 25.830% was achieved with the deployment of the technology in Bauchi region. From the results obtained, it is observed that DG technology can be installed in all regions of the country but the most viable places to install the technology are in the Northern part of the country.