Optimal power control of a three-shaft Brayton cycle based power conversion unit / by Kenneth R. Uren
The aim of this study is to develop a control system that optimally controls the power output of a Brayton cycle based power plant. The original design of the PBMR power plant is considered. It uses helium gas as working fluid. The power output of the system can be manipulated by changing the helium...
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North-West University
2009
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| Online Access: | http://hdl.handle.net/10394/733 |
| Summary: | The aim of this study is to develop a control system that optimally controls the power
output of a Brayton cycle based power plant. The original design of the PBMR power
plant is considered. It uses helium gas as working fluid. The power output of the
system can be manipulated by changing the helium inventory to the gas cycle.
A linear model of the power plant is derived and modelled in Simulink®. This linear
model is used as an evaluation platform for different control strategies. Four actuators
are identified that are responsible for manipulating the helium inventory. They are:
A booster tank
A gas cycle bypass control valve
Low-pressure injection at the low-pressure side of the system
High-pressure extraction at the high-pressure side of the system
The control system has to intelligently generate set point values for each of these
actuators to eventually control the power output. Two control strategies namely PID
control and Fuzzy control are investigated in this study.
An optimisation technique called Genetic Algorithms is used to adapt the gain constants
of the Fuzzy control strategy. This resulted in an optimal power control system for the
Brayton cycle based power plant. === Thesis (M.Ing. (Computer and Electronical Engineering))--North-West University, Potchefstroom Campus, 2005. |
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