金沙江下游流域水风光多能互补调度研究

On the Complementary Dispatching of Hydro-Wind-Photovoltaic Energies in the Lower Jinsha River Basin

针对金沙江下游水风光多能互补运行管理中系统难度增高、调度需求复杂多变以及多时空尺度的不确定性等难点,主要分析了该流域水风光互补性,对水光风多能互补系统长-短耦合调度研究表明,金沙江下游水、风、光资源整体互补性良好。短期调度建议采用新能源优先并网,水电出力与风光弃电响应关系呈现两端大中间小的特征。风光新能源与水电打捆形成互补系统进行中长期调度。整个多能互补系统发电量将增加0.40%~0.48%,其中梯级水电较独立运行将损失发电量0.08%~0.25%,但风光新能源消纳水平可提升3.97%~5.99%。

In the complementary operation and management of the hydro-wind-photovoltaic multi energies in the lower Jinsha River Basin,various difficulties are encountered such as the increased systematic difficulty,complex and variable dispatching requirements,and uncertainties in multiple temporal and spatial scales.Thus,the hydro-wind-photovoltaic multi energy complementarity of the river basin is analyzed.Studies on the long-term and short-term coupling dispatching of the multi energy complementary system show that the overall complementarity of the hydro-wind-photovoltaic resources in the lower Jinsha River Basin is good.For short-term dispatching,it is suggested to give priority to the grid connection of new energies.The relationship between the hydropower output and the wind and photovoltaic power curtailment shows a characteristic of large at both ends and small in the middle range.If the wind and photovoltaic energies are combined with the hydropower energy to form a complementary system and medium to long-term dispatching is adopted,the power generation of the multi energy complementary system will be increased by 0.40%to 0.48%,in which the cascade hydropower stations will lose 0.08%to 0.25%of their power generation compared to independent operation,while the consumption rate of wind and photovoltaic energies can be increased by 3.97%to 5.99%.