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目前,水电站厂内负荷准实时优化分配在中小型水电站得到了较好的应用,而在巨型水电站却缺乏深入研究。基于巨型水电站的实际生产运行情况,充分考虑其所担负的电网调峰、调频任务,增加了避免机组负荷大面积转移的约束条件;设计了巨型水电站厂内负荷准实时优化分配模块;采用改进动态规划算法,以水电站耗水量最小为目标,建立了巨型水电站厂内负荷准实时优化分配模型,并将该模型应用于四川省瀑布沟巨型水电站(3 600MW)。结果表明,通过厂内负荷准实时优化分配运行,电厂日发电耗水率由2.678m3/(kW·h)下至降2.599m3/(kW·h);厂内经济运行效益提高近3%;平均计算耗时0.102s。该结果为研究巨型水电站厂内负荷优化分配提供了可靠参数,其建模思路也可供类似巨型水电站借鉴和参考。
At present, the optimal real-time load distribution in hydropower plant is well applied to small and medium-sized hydropower stations, but there is a lack of in-depth research on giant hydropower stations. Based on actual production and operation conditions of Giant Hydropower Station, the peak load and frequency modulation tasks of the power grid are fully taken into account, and the constraints of large-scale unit load avoidance are increased. The real-time optimal distribution module for in-plant load of Giant hydropower station is designed. Planning algorithm, aiming at minimizing the water consumption of hydropower station, a quasi-real-time optimal distribution model for in-plant load of giant hydropower station was established and applied to the Pubugou Giant Hydropower Station (3 600MW) in Sichuan Province. The results show that the water consumption rate of daily power generation in power plant is reduced from 2.678m3 / (kW · h) to 2.599m3 / (kW · h) by optimizing the distribution of plant load in real time; the economic efficiency of the plant is increased by nearly 3% The average calculation time 0.102s. The results provide reliable parameters for studying the optimal distribution of loads in a giant hydropower plant. The modeling ideas can also be used for reference and reference to similar giant hydropower stations.