采用虚拟恒压水池增容的抽水蓄能电站设计与运行策略

Design and Operation Strategy of Pumped-storage Power Plant with Virtual Constant Pressure Pool to Increase Capacity

对于水头变幅大的抽水蓄能电站,往往找不到满足水头变幅范围的水轮机,造成了电站水库库容浪费,限制了日发电量。为增大可利用库容,引入了液压恒压网络的概念,采用虚拟恒压水池作为液压恒压网络的液压蓄能器,将多组不同面积比的液压缸作为液压变压器,使抽水蓄能电站水库大变幅的水头通过液压传动机构转变为虚拟恒压水池小变幅的水头,再进行水轮机/水泵的发电与储能,保证水轮机高效运行,增加可持续发电量。

For the pumped-storage power station with large water head variation,the pump/turbine is often not found to meet the variation range of water head,which will cause the waste of reservoir capacity and limit the daily power generation.In order to increase available storage capacity,the concept of hydraulic constant pressure network is introduced.A virtual constant pressure tank is used as a hydraulic accumulator in the hydraulic constant pressure network,and a group of hydraulic cylinders with different area ratios are used as hydraulic transformers.The water head with large variation range in the reservoir of pumped-storage power station is transformed into the head with small and medium variation range of virtual constant pressure water tank through the hydraulic transmission mechanism,and then the power generation and energy storage of pump/turbine will be carried out.It ensures the efficient operation of turbine and increases the capacity of sustainable power generation.