大型石化企业蒸汽动力系统运营优化

针对大型石化企业蒸汽动力系统（SPS）具有多个动力产汽点且距离较远、各动力产汽点产供汽参数和成本不同的特点，在传统SPS能量转换环节运营优化的基础上，提出SPS能量转换环节和传输环节集成优化的策略，建立大型石化企业SPS能量转换环节和能量传输环节集成运营优化的混合整数线性规划（MILP）模型；对某大型石化企业蒸汽动力系统建立模型并求解得到了产汽成本和传输费用综合最优的优化运营方案，与原有的计划运行方案相比，优化运营方案可节约运行成本2.8%。

OPERATIONAL MANAGEMENT OPTIMIZATION OF STEAM POWER SYSTEM IN LARGE PETROCHEMICAL ENTERPRISE

The steam power systems (SPS) in large petrochemical enterprises are usually composed of several power plants and the potential of operational management optimization under current energy resources exists. In this paper, the characteristic of SPS in a large petrochemical enterprise was analyzed and an optimization strategy was presented. In this strategy the energy conversion and energy transportation were integrated to minimize the generation and transportation cost of steam and power. A mixed integer linear programming (MILP) model for multiperiod operational planning and management of SPS was established. A detailed case study showed that a 2.8% of the operation cost was saved by the optimization as compared with the original operational management. In addition, some suggestions for improvement were proposed to solve several current problems in SPS of large petrochemical enterprises.