Design and analysis of a hybrid power system for Western Libya

Mosbah, Fathi (2018) Design and analysis of a hybrid power system for Western Libya. Masters thesis, Memorial University of Newfoundland.

[English] PDF - Accepted Version Available under License - The author retains copyright ownership and moral rights in this thesis. Neither the thesis nor substantial extracts from it may be printed or otherwise reproduced without the author's permission. Download (27MB)

Abstract

Renewable energy systems are widely used in the world, as their prices are going down and efficiencies are improving every year. According to energy data from the General Electricity Company of Libya, electricity demand in Libya is growing by about 9 percent every year. An increasing number of power generators is needed to meet the electricity demand and prevent power outages. In this thesis, available renewable energy sources in Bani Walid, Libya, which is part of the western Libya power system, are studied to design a hybrid power system. Optimization results show that a large-scale 76.8 MW PV system with a backup generator and batteries for energy storage can provide reliable power in that area. A detailed system design, optimal location, and stability analysis of the system have been studied and the results are presented in this thesis. The system is sized using Homer ver. 2.68. Results of sensitivity analysis show that irradiance sensitivity of -5, 0, and +5 have more effect on PV sizing than on the batteries. Power system steady-state analysis and power flow calculation are done using PowerWorld. Designed system stability and fault analysis are done using ETAP. Results indicate that the expected maximum voltage drop is only 1.2%. Contingency analysis indicates that an outage of transformer T10 will lead to 130% overloading of T11 and an outage of transformer T13 can cause 108% overloading of T14. Transient analysis results indicate that after a trip, voltage can vary by ±4%, with a peak variation of ±12%. The system control methods and suggestions for further work are included in the thesis.

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