关键词: 注水系统, 运行参数优化, 变频调速泵, 数学模型, 改进遗传算法

Abstract: 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.

Key words: water injection system, operation parameter optimization, variable frequency speed regulation pump, mathematical model, improved genetic algorithm