Thesis (MSc) - Cyprus International University. Institute of Graduate Studies and Research Electrical and Electronics Engineering Department

Includes bibliography (sheets 131-134)

ABSTRACT
The hybrid (solar-wind) power system is the combination of wind energy and solar
energy to produce electricity. This system is designed to produce electricity 24/7 to
feed the load in Kaduna, Nigeria at a cheaper rate with less harmful gases released to
the environment. This system is needed because the electricity in Nigeria as a whole
is unreliable and in some parts of the country it is non-existent. So an efficient system
that is reliable and can produce electricity continuously is needed. For this proposed
system, Kaduna State is used as a case study. Kaduna state is located in the Northern
part of Nigeria which has an average wind speed of 4.98m/s and average solar GHI of
5.94kWh/m2
/day. The use of these two systems together is more advantageous for the
generation of electricity. The electricity in Nigeria is in dire need of improvement so
this case study shows whether the implementation of hybrid systems can
improve/solve the electricity issue in Nigeria. The proposed system is simulated using
Homer Pro.
8 scenarios were tested out with different generation ratios. Out of the 8 scenarios, four
scenarios have the same component and the other four scenarios have different
components. The load generation ratio is how the load generation is divided between
the wind turbine and solar array. The ratios are 50-50, 75-25, 25-75, a fourth scenario
was added later on, the case is to let Homer pro size up the system by itself using
Homer optimizer. These scenarios with two types of generating sources is what made
up this case study. Out of all the scenarios, scenario 6 has the best configuration which
is, the off-grid system with PV array and wind turbine which has a load generation
ratio of 25-75 which means the PV will produce 25% of the needed power and the
turbines will produce the rest 75% of the needed power. The system also has batteries
and generator. This scenario 6 NPC is $138,680,300.00 and the LCOE is $0.09719.
The scenario 6 has a total production of 116,154,378kWh/year and CO2
emission of
3,553,083kg/year. This scenario 6 is considered the best because even though all the
scenarios have the same load, this scenario 6 produced electricity with the lowest NPC
and LCOE, and it is also environmentally friendly since 95.7% of the system
generation is from the renewable sources.
Keywords: Batteries, Electricity Generation, Homer Pro, Hybrid System, LCOE,
Photovoltaic, Renewable Energy, Solar Energy, Wind Energy, Wind Turbines