摘要
为充分优化梯级水电站对新能源的消纳以及提升其削峰能力,在不改变已有梯级水电站运行现状条件下,充分利用梯级水电站的上水库库容,将其扩建加装抽蓄机组形成梯级混合式抽水蓄能电站。为此,构建了一种在已运行梯级水电站中融合改造的混合式抽水蓄能电站容量优化配置模型,研究确定混合式抽蓄电站的装机容量。鉴于所构建的模型中含有众多非线性约束,直接求解模型较为困难,因此采用分段线性化、三维变量线性插值以及大M法将非线性模型转化为混合整数线性规划模型,然后采用Gurobi商业求解器进行求解。算例结果表明,两种运行方案得到的抽蓄机组容量分别为两台90 MW抽蓄机组以及两台190 MW抽蓄机组,混合式抽蓄电站与常规梯级电站相比发电收益更大,两种方案混合式抽蓄电站发电收益分别增加0.22和0.44亿元,验证了所建模型和求解方法的有效性。
To fully optimize the consumption of renewable energy by cascade hydropower stations and enhance their peak shaving capability,this study proposes the expansion and integration of pumped storage units into existing cascade hydropower stations by utilizing the upstream reservoir capacity,thereby forming a cascade hybrid pumped-storage hydropower station without altering the current operational conditions of the cascade hydropower system.To achieve this,a capacity optimization model for the hybrid pumped-storage hydropower station retrofit within operating cascade hydropower stations is developed,aiming to determine the optimal installed capacity of the hybrid pumped-storage units.Given the presence of numerous nonlinear constraints in the formulated model,direct solution approaches are computationally challenging.Therefore,piecewise linearization,three-dimensional variable linear interpolation,and the Big-M method are employed to convert the nonlinear model into a mixed-integer linear programming(MILP)model,which is then solved using the Gurobi commercial solver.The case study results indicate that the capacity of the two proposed pumped-storage schemes are two 90 MW pumped-storage units and two 190 MW pumped-storage units,respectively.Compared to conventional cascade hydropower stations,the hybrid pumped-storage hydropower station demonstrates higher power generation revenues,with increases of O.22 billion CNY and O.44 billion CNY under different schemes.These findings validate the effectiveness of the proposed model and solution methodology.
作者
王莹
耿浩洋
凌煦
袁晓辉
WANG Ying;GENG Hao-yang;LING Xu;YUAN Xiao-hui(Central China Branch of State Grid Corporation of China,Wuhan 430077,Hubei Province,China;School of Civil and Hydraulic Engineering,Huazhong University of Science and Technology,Wuhan 430074,Hubei Province,China)
出处
《中国农村水利水电》
北大核心
2025年第11期157-162,170,共7页
China Rural Water and Hydropower
基金
国家电网有限公司总部管理科技项目资助(5100-202404017A-1-1-ZN)。
关键词
混合式抽水蓄能电站
梯级水电站
容量配置
分段线性
混合整数线性规划
hybrid pumped storage power stations
cascade hydropower station
capacity configuration
piecewise linearization
mixedinteger linear programming(MILP)
