一种带抽蓄机组水电系统短期优化调度方法

An Optimal Method of Short-Term Scheduling for Hydropower System With Pumped-Storage Units

采用线性混合整数规划(MILP)方法研究水电系统短期优化调度问题成为国际学术界的新潮流,其研究难点在于调度模型中非线性因素的线性化方法设计。在模型分析的基础上,针对含抽水蓄能机组的梯级水电系统中存在的主要复杂约束,如非线性水电转换关系、最小开关机时间、抽蓄机组特性、水流延时等约束,提出相应的线性化方法及约束转换方案,解决了模型转化的研究难题。测试结果表明,文中提出的系统化方法具有普适性,适应于各种模型中类似的非线性因素线性化及相应的约束处理,方法有效实用,可灵活地拓展到其他调度领域。

Study for short-term scheduling of power system with pumped storage units based on mixed integer linear programming（MILP） becomes a new trend in international academic community. Its difficulty is to design linearization approaches for nonlinear factors in scheduling model. In this paper, a new linearization approach and conversion scheme of constraints are proposedbased on model analysis, dealing with main complex constraints in the system such as nonlinear hydroelectric production function, minimum down/up time of units, characteristics of pumped-storage units and water delay time etc. Numerical simulation results show that the practicaland systematic approach proposed in this paper is universal and effective, suitable for handling similar nonlinear factors in various models and can be flexibly expanded to other scheduling fields.