融合改造的混合式抽水蓄能与风电联合运行短期调度模型

A joint short-term operation model for wind power and hybrid pumped-storage hydropower plant

依托规模庞大的常规水电增建混合式抽水蓄能是加快抽蓄发展的重要途径。相比传统抽蓄电站,融合改造的混合式抽水蓄能电站具有水力联系更紧密、抽-发工况转换更复杂、“量调并重”角色更鲜明等显著特点,为探索其运行模式,本文提出一种融合改造的混合式抽水蓄能与风电联合运行短期调度模型。该模型以联合体整体收益最大为目标,以机组为最小调度单元,针对常规机组和抽蓄机组的差异化运行特性分别精细化建模,并引入状态变量实现运行状态的解耦与关联切换。在模型求解方面,通过线性化方法及建模技巧将原模型转换为混合整数线性规划(Mixed Integer Linear Programming,MILP)模型,最后在JAVA环境中采用CPLEX工具进行求解。以西南某流域电站为参考构建的应用示例验证了本文模型和求解方法的有效性,可为推进常规水电站的融合改造提供借鉴。

It is an important way to accelerate the development of pumped storage by building hybrid pumped storage plant based on the large-scale traditional hydropower.Compared with traditional pumped-storage hydropower plants,the hybrid pumped-storage hydropower plant(HPSHP)retrofitted from a traditional hydropower plant has significant characteristics such as closer hydraulic connection,more complex pumping and generating operation mode conversion,and more prominent roles of“both quantity and regulation”.In order to explore HPSHP’s operational mode,a joint short-term operation model for wind power and HPSHP is proposed in this paper.The model aims to maximize the overall profits of the consortium,and takes the unit as the minimum scheduling unit.The units are modelled according to the differential operating characteristics of the traditional units and the pumping-storage units,and state variables are introduced to realize the decoupling and association switching of the operating states.In terms of model solving,the original model was converted to a mixed integer linear programming(MILP)model by linearization method and modeling skills,and finally solved by CPLEX tool in JAVA environment.A case study of a hydropower plant in southwest China verifies the effectiveness of the proposed model and solution method,which can provide a reference for the retrofitting of traditional hydropower plants.