基于进化策略的水电站水力过渡过程优化方法研究

Study on optimization method of transient process in hydropower station based on evolution strategy

本文针对水电站水力过渡过程多目标优化计算,建立了相应的数学模型,将进化策略和水电站过渡过程数值计算特征线法相结合,探讨了用于求解该模型的全局优化方法。该方法从多个初始点开始并行寻优,不仅适应于水力过渡过程各种工况对导叶启闭规律的优化,而且可以同时对机组转动惯量和调压室阻抗孔大小进行优化。工程实例计算表明,应用进化策略优化水力过渡过程是可行、高效的。

A mathematical model of optimization of transient process in hydropower station is established. Based on the combination of evolution strategy and method of numerical characteristics analysis for transient process, an effective global optimization method is proposed to solve the mathematical model. The method can search the optimum initializing from several original points, it can be used to optimize the guide vane open and closure rules and the hydraulic resistance coefficients of surge-chamber and moment of inertia of set. The feasibility and efficiency of the proposed method are finally demonstrated with transient process analysis of a real hydropower station.