【作者】 闫翠会；

【导师】 韩忠旭； 万晖；

【作者基本信息】 中国电力科学研究院 ， 电力系统及其自动化， 2010， 硕士

【摘要】 随着电网的智能化发展,以及机组容量的增大,对于锅炉被控对象动态特性的研究就尤为突出,面临着对象建模和控制算法两方面的研究。建立负荷与锅炉参数之间的数学模型也是本文的主要研究工作之一。以经验性的经典传递函数为基础,探索了一种可以描述一类大惯性、大迟延和慢时变特性的非线性系统建模的方法。并以此模型为依据建立控制系统,主要学习和深入研究了适用于非线性系统的增量式函数观测器理论,在此基础上结合经典的PID控制,随着理论学习的深入,在学习广义模糊智能控制理论的基础上,将其融合到原有的增量式观测器和PID串联的控制系统中,进一步提高系统的控制目标。通过大量的仿真实验知,增加广义模糊智能策略后的系统比原来系统的控制效果有所提高。所建立的数学模型分为高阶等容系统和高阶不等容系统,利用现有的仿真平台,对系统进行组态及各种工况下的运行控制和调试,以求达到最好的控制效果,同时对系统的稳定鲁棒性进行了相关的推导和证明。通过仿真了解了模型的全工况运行情况,进而可以更深入的研究系统的动态特性,为了对系统有更深入的认识,同时对模型在不同扰因素下的响应进行仿真。更为全面的验证了本文所建立的全程非线性数学模型是合理的和正确的,并且能够较好的反应系统的动态特性,所设计的控制系统对有大滞后和大惯性的非线性系统较为适用,控制效果显著,可以满足实时仿真的要求。更多还原

【Abstract】 With the development of intelligent power system and unit volum increasing, the study of dynamic charateristics with bolier is becoming especially prominently, it is facing with the object modeling and control algorithm. To establish the mathematical model between the load and bolier parameters is the purpose of this article. In this paper, talken the classical empirical transfer function as basement to explore a mathematical method which can describe a class of nonlinear systems. And with the model to establish control system, it is to study the incremental function observer theory of nonlinear system, and combined the classical PID control to control the new established model, then with understanding of the fuzzy intelligent control theory and then embed into the existing incremental function observer and PID control system to improve the performance of control.The established mathematical model is divided with high-order same capacity and high-order different capacity system, the different simulation tests were taken on the different systems, with the existing simulation systems to configuration then it run with different working conditions and debugging in order to achieve the best control effect, the stability and the robustness of the system is proved with the related derivation and proof. The simulation test with the all operation working conditions can help studying the dynamic characteristic of the system, at the same, the simulation curves are get with normal working condition and different disturbance cases. The simulation tests has shown that the established full scope non-linear mathematical model is reasonable and correct to describe the system dynamic characteritis, the control system also fit for the system with the big lag and large inertia characteristic, and the control result is better and can meet the requirements of real-time simulation.更多还原