Computer Modeling and Simulation of Coal fired Cogeneration Power Plant
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Date
2004-07
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Addis Ababa University
Abstract
This thesis describes a power plant simulator which has been developed using
MATLAB code.
The basis of the power plant modeled here is the design data of Coal-Phosphate
Fertilizer Complex Project (COFCOP), and the type of boiler and turbine are taken
as selected by the project. Therefore, the boiler modeled here is a circulating
fluidized bed coal combustor type, and the turbine is an extraction condensing type
at heat to power ratio.
Conservation equations and characteristic curves are used to model each
component of the power plant. From these mathematical model equations, the
component modules are developed using MATLAB code. Output parameters are
obtained from input data to the component modules. Simulation of systems,
subsystems and components are accomplished using the Newton-Raphson
technique.
The total system of the power plant is simulated by a program called
powerplant_main. In this program there are four basic solvers. These are: the
turbine solver, the boiler solver, the water flow solver and the steam flow solver.
Each solver has its own residue generator function and Jacobean generator
function. The Gaussian elimination function is called by any solver during
simulation.
The power plant in COFCOP is still in design stage, and it cannot be used for
program verification in this paper. Hence, a hypothetical power plant data is taken
and the output of the simulation closely approximates the real case.
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Mechanical Engineering