安装变频调速装置的复杂注水系统运行优化研究

Operation optimization of complex water-injection system with variable frequency speed-regulation pump

以轴功率最小为目标函数,以限制水量平衡、注水压力、调速泵转速、泵排量为约束条件,建立了安装变频调速装置的复杂注水系统运行参数优化数学模型。针对复杂注水系统的运行特点,采用改进遗传算法对运行优化模型进行了求解,同时优化了变频泵的位置和运行参数。改进遗传算法采用实数编码,并对适应函数进行了调整,采用随机多父辈适应函数值加权交叉法,改进了变异操作。在操作过程中,给出了泵排量和变频调速的处理方法,大大减少了不可行解的产生,使该算法的优化性能得到了提高。用算例说明了该优化方法的有效性。

A mathematical model for operation optimization of complex water-injection system with variable frequency speed-regulation pump was established, by taking the minimum shaft power as the objective function and taking the restrictions of the water quantity equilibrium, injection pressure, rotational speed and displacement of variable-speed pump as the constraint conditions. Aiming at operation feature of complex water injection system, the improved genetic algorithm was adopted to solve the mathematical model of operation optimization. The position of variable frequency and the operation parameters of pump were determined. The real number coding was adopted in the improved genetic algorithm, and the fitness function was adjusted. The random parent-number fitness-weighted cross was adopted to improve the mutation method. The methods for processing the displacement of pump and variable frequency speed regulation were proposed. The number of infeasible solutions was reduced, and the optimum performance of the algorithm was improved. The calculation example showed the efficiency of the algorithm.