汛限水位动态控制对水电-新能源互补能力的提升研究

Research on Dynamic Control of Flood Limit Water Level to Improve Complementary Capacity of Hydropower and New Energy

在水能富集地区,丰水期来水量大,水电发电量大,调节能力不足,水电-新能源消纳矛盾突出,互补调度困难较大。为了缓解汛期水电-新能源消纳矛盾,创新地将汛限水位与新能源消纳相结合,探讨汛限水位动态控制对水风互补能力的提升效果。建立了一定弃电率条件下源荷匹配度最大的水风互补模型,以旬为计算周期、小时为计算时段,采用遗传算法对雅砻江下游“两库五级”梯级电站及周边风电场组成的互补系统开展模拟计算,通过对比分析发现汛限水位动态控制方案相比静态控制方案可多消纳2.55%的风电。结果表明,通过汛限水位的动态控制可以动态增加水电可利用的调节库容,从而提升水电调节新能源的能力。

In water rich areas,the large amount of incoming water and hydropower generation during the abundant water period are not sufficiently regulated,resulting in prominent hydropower-new energy consumption contradictions and greater difficulties in complementary scheduling.In order to alleviate the contradiction between hydropower and new energy consumption during the flood season,the flood water level is innovatively combined with new energy consumption,and the effect of dynamic control of flood water level on the improvement of water-wind complementary capacity is discussed.A model with maximum source-load matching under a certain abandonment rate is established,and a genetic algorithm is used to simulate the complementary system consisting of "two reservoirs and five stages" downstream of Yalong river and the surrounding wind farms.This shows that the dynamic control of flood limit water level can dynamically increase the available regulating reservoir capacity of hydropower,thus enhancing the ability of hydropower to regulate the new energy.