Dynamic Simulation and Real-Time Optimization of Steam Power Plants using an Object-Oriented Language

摘要

Simulation and optimization play a substantial role in the design of the control system of steam power plants, in particular when innovative design and optimization efforts are undertaken. Moreover, the competitive capital utilization demands at the integrated plant level for increased economic performance, while maintaining safety and environmental regulations, present a new motivation for the simulation and optimization of power plant operations and controls. The objective of this work is to evaluate the suitability of equation-oriented modeling languages, in particular the Modelica language and libraries in the Dymola software, for the dynamic simulation, real time optimization and control of power generation systems of Alstom Power. In this presentation, the steps for the development and steady-state validation of an integrated steam cycle-boiler model are discussed, as well as the real time optimization capabilities of the model using the Functional Mockup Interface to bridge the Dymola models with the optimization functionality of MATLAB and JModelica. The suitability and accuracy of the model, as compared to reference values for the plant's steady state operation, are discussed, focusing on: (1) Evaluation of the available libraries for the components of a power plant simulator, (2) Incorporation of conventional control structures in the system model (3) Connectivity and integration of the models in dynamic optimization algorithms, and (4) Interfacing of the optimization algorithms and dynamic models with data collection, and management software. The developed power plant models are critically evaluated in terms of their: (a) performance, (b) user friendliness, (c) scalability, (d) computational efficiency, (e) adoptability to other mathematical solvers, and (f) interfacing capabilities. A vision on using such process simulation models and optimization tools for power plant controls and performance improvement will be shared in this paper and presentation.