【摘要】 建立受控对象的动态数学模型是研究水轮机控制系统特性的基础工作。以往此项工作是根据水轮机外特性(即模型试验特性)曲线建立水轮机的力矩和流量线性方程。本文提出了水轮机内特性描述法,即利用水轮机基本方程导出计入各项动态因素的解析表达式。建立的受控对象的数学模型适用于水电厂孤立运行时不需现场试验进行动力学分析;当给定最优准则依据仿真技术也可进行最优参数整定。更多还原

【Abstract】 The fundamental work for studies on the benavious of the hydrotubine contorl system is to establish the dynamic mathematical model of the controlled system. What" has been done in the past was to derive the linearized equations of the hydroturbine torque and flow rate with the model-test curves, i.e. the external characteristics. With this paper, a description method is developed in reference to the mathematical model of controlled system with the internal characteristics, i.e. the analytical expressions by means of the hydroturbine basic equations considering various dynamic factors. Applying to various types of hydroturines installed in the isolated system, this model doesn’t need site-test data to analyze the dynamics of the control system, and able to make the optimal setting of the governor parameters by the simulation technique as given the optimum performance index. In addition, the mathematical model described by the state equations is further discussed.更多还原