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Abstract
The thesis aims at the investigation of the reliability analysis of large
electric power networks when a bulk of wind energy generation is connected to those power networks supplied originally from traditional power plants. The thesis starts by a brief introduction to the importance of
reliability studies in power networks and the involvement of wind energy
generators. The introduction also defines the thesis objectives and main
outlines of the thesis chapters.
An extensive review of published literature on the subject is included
with criticism of methods and results. A short survey of reliability principles, methods and indices is introduced. The well established
mathematical models of traditional generating units applicable to
reliability studies are summarized.
A new suggested and derived model of
wind energy generating units for reliability studies is introduced.
This model forms a new contribution to reliability studies and the models for
generating plants.
The new method simulates the wind turbine generator power as a fourstate
of operation of wind energy generators. This approach enabled to make integral reliability study of a large system consisting of traditional and wind energy generating units. Application of the suggested model is performed to the unified network of Egypt. First three of the main reliability indices were studied for the network without the wind
generation units. Then the same study is performed using the same load
conditions but with the wind energy generation portion connected. This
study has proven that the wind energy share has improved all the reliability indices under consideration.
The cost of energy generation together with the cost of unsupplied electric load for different types of customers: industrial, agriculture, commercial, and residential are calculated. For this calculation a new suggested program has been established. The program takes into consideration the hour by hour cost of both energy produced by each type of generation and unsupplied loads. The work is repeated with full power of wind energy generators in application.
The Monte-Carlo simulation method is applied for the determination of the average cost over a large period and taking all possible alternatives into consideration. This presents a second contribution to the thesis.
The thesis is concluded by defining the new contributions. Also, the main objectives of the thesis are realized. It has been proven that the benefits of wind energy generation penetration in the traditional large power networks exceed the share of the cost. Also, the effect of integration wind energy generation in large electric power networks effectively increases their reliability and reduces both generation cost and penalties of unsupplied load.