考虑变频调速的注水系统运行参数优化

以注水系统耗电量最小为目标函数,以排量、压力等限制为约束条件,在考虑离心泵变频调速的基础上,建立了注水系统参数优化数学模型,并用外部惩罚函数法将该问题转化为无约束问题。针对遗传算法的局限性,采用浮点数编码调整了适应函数,根据泵排量和水量平衡要求改进交叉和变异操作,实施最优保留策略,并结合模拟退火算法,形成了混合遗传算法,该算法能够有效地减少不可行解的产生,提高收敛速度,避免早熟收敛。实例计算说明,该优化方法有效、实用,优化后系统运行状况明显改善。

Optimization of operation parameters of waterflooding system considering variable frequency speed regulation

An optimization model of operation parameters of waterflooding system is established in consideration of variable frequency speed regulation, in which the least power consumption is taken as objective function and the restrictions to the displacement and pressure as constraint conditions. Through the outer penalty function method, the problem is transformed to nonrestraint optimization problem. Aiming at the limitation of genetic algorithm, float coding is adopted to adjust the fitness function, and the cross and mutation method are improved according to the needing of pump displacement and water balance. Then the hybrid genetic algorithm is formed by carrying out the optimized reserved strategy combined with simulated annealing algorithm. This algorithm can reduce the number of infeasible solution and improve the speed of convergence and avoid premature convergence. Example of calculation shows that the algorithm is efficient and practical.