Title :
Multi-objective Nonlinear Predictive Control for STEC Plant
Author :
Zhao, Zhong ; Ikegami, Y. ; Goto, S. ; Nakamura, M.
Author_Institution :
Dept. of Autom., Beijing Univ. of Chem. Technol.
Abstract :
Hot spring thermal energy conversion (STEC) plant is a system that converts thermal energy into electricity by using the temperature difference between hot spring water and sea/river water. In this paper, the diffuser multi-objective control problem of STEC plant is presented. Based on the step test, the nonlinear separation model of working fluid dryness and pressure difference between turbine inlet and outlet for STEC plant was identified. According to the concept of back-off, a multi-objective coordination algorithm using the information of process static constraints was proposed. Based on the identified nonlinear separation model, a solution for STEC diffuser nonlinear predictive control was proposed. The application results have verified the feasibility and effectiveness of the proposed solution
Keywords :
nonlinear control systems; nonlinear programming; power system control; predictive control; thermal power stations; thermoelectric conversion; turbines; STEC plant; diffuser nonlinear predictive control; energy conversion system; hot spring thermal energy conversion plant; hot spring water; multiobjective coordination algorithm; multiobjective nonlinear predictive control; nonlinear programming; nonlinear separation model; pressure difference; process static constraints; river water; sea water; temperature difference; turbine inlet; turbine outlet; working fluid dryness; Automation; Chemical technology; Energy conversion; Ocean temperature; Predictive control; Predictive models; Pumps; Rivers; Springs; Turbines; Energy conversion system; multi-objective coordination; nonlinear predictive control; nonlinear programming; nonlinear separation model;
Conference_Titel :
Intelligent Control and Automation, 2006. WCICA 2006. The Sixth World Congress on
Conference_Location :
Dalian
Print_ISBN :
1-4244-0332-4
DOI :
10.1109/WCICA.2006.1714301
