Kebede, Mikias Hailu (2014) Dynamic Modeling and Techno-Economic Analysis of Pv-Wind-Fuel Cell Hybrid Power System: The Case Study of Nifasso. Masters thesis, Addis Ababa University.
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Abstract
Due to ever increasing energy consumption, rising public awareness of environmental protection and steady progress in distributed generation, alternative (i.e., renewable and fuel cell based) distributed generation (DG) systems have attracted increased interest. Wind and photovoltaic (PV) based power generation are two of the most promising renewable energy technologies. Fuel cell (FC) systems also show great potential in DG applications of the future due to their fast technological development and the merits they have, such as high efficiency, zero or low emissions (of pollutant gases) and flexible modular structure. In this thesis work, the techno-economic feasibility study (using HOMER) of emission free hybrid power system of solar, wind and fuel cell power source unit for a given rural village (Nifasso) that can meet the electricity demand in a sustainable manner has been studied. The main power for the hybrid system comes from the solar and wind energy while the fuel cell and rechargeable batteries are used as a secondary and primary energy back up units respectively. The modeling and control of a hybrid PV-Wind-FC DG system is also addressed. Dynamic models for the major system components, namely, wind energy conversion system (WECS), PV energy conversion system (PVECS), fuel cell, electrolyzer, inverter, battery, hydrogen storage tank and an overall power flow controller unit are developed. Then, a simulation model for the proposed hybrid power system has been developed using MATLAB/Simulink environment. This is done by creating a subsystem and masked block sets of the major dynamic component models and then cascading (assembling) in to a single aggregate model. The overall power management strategy for coordinating and/or controlling power flows among the different energy sources is also presented in the thesis. Simulations have been carried out to verify the system dynamic performance using a practical load profile and weather data. The result show that the overall power management strategy is effective and the load demand is balanced successfully. To make the thesis work complete, a grid extension from the closest substation has been designed. Cost of the grid extension is estimated based on the data obtained from EEPCoUEAP office. This is done in order to compare the cost of the designed hybrid RES power system against the cost of grid extension. The result shows that breakeven grid extension distance to be 25.1 km which indicates that grid extension is preferable.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | PV-Wind-Fuel Cell Hybrid Power System; Dynamic Modeling; TechnoEconomic Analysis; Load Profile; Grid Extension; Overall Power Flow Control. |
| Subjects: | H Social Sciences > HF Commerce Q Science > QA Mathematics > QA75 Electronic computers. Computer science T Technology > T Technology (General) T Technology > TK Electrical engineering. Electronics Nuclear engineering |
| Divisions: | Africana |
| Depositing User: | Andriamparany Edilbert RANOARIVONY |
| Date Deposited: | 29 Oct 2018 07:47 |
| Last Modified: | 29 Oct 2018 07:47 |
| URI: | http://thesisbank.jhia.ac.ke/id/eprint/7090 |
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