A complex multi-reservoir hydropower development (HPD) was studied from the point of view of energy production. The Gâlceag HPD system consists of three reservoirs, a high head hydropower plant (HPP) powered by two Francis turbines of 75 MW each, and a pumping station (PS) equipped with two centrifugal pumps of 10 MW each. The hydraulic system configuration is unusual: the PS discharge pipe conveys the water directly into HPP's penstock. Three operation scenarios were investigated: ① normal operation (with PS shutdown and HPP operational, as a conventional HPP), ② simultaneous operation (with both HPP and PS operational), and ③ pumped storage (with HPP shutdown and PS operational). Primarily, a numerical model was set up in EPANET to investigate the influence that the variation in the initial level of the HPP upstream reservoir has on the production of energy. In the sequel, a numerical model was derived and solved in GNU Octave to investigate the influence on the energy production of HPD due to initial levels of both the HPP upstream and downstream reservoirs. The results can be used in a decision support system to assess the overall operation of Gâlceag HPD based on water availability.

从能源生产的角度研究了一个复杂的多水库水电开发项目。GâlceagHPD系统由三个水库组成，一个高水头水电站（HPP），由两个75 MW的弗朗西斯涡轮机提供动力，以及一个泵站（PS），该泵站配备了两个10 MW的离心泵。液压系统的配置不​​同寻常：PS排放管将水直接输送到HPP的压力管道中。研究了三种运行方案：①正常运行（与传统的HPP一样，PS关机和HPP均可运行）；②同时运行（HPP和PS均可运行）；以及抽水蓄能（HPP关机且PS可以运行）。首先，在EPANET中建立了一个数值模型，以研究HPP上游水库初始水位变化对能源生产的影响。随后，在GNU Octave中推导并求解了一个数值模型，以研究由于HPP上游和下游油藏初始水位对HPD能源生产的影响。结果可用于决策支持系统中，以根据水的可用性评估GâlceagHPD的总体运行情况。