跨流域调水工程的发电影响分析模型研究

Research on Power Generation Impact Analysis Model for Inter-Basin Water Transfer Project

为研究跨流域调水工程对下游流域梯级水电站群的发电量及电量结构影响,选取梯级电站枯水期最小出力最大化及年发电量最大两个目标,建立了跨流域调水工程的发电影响分析模型,采用逐步优化算法求解模型,并以西南地区的跨流域调水工程为例,研究“年内均匀调水”方式和“丰水期多调枯水期少调”方式的梯级电站年发电量及其结构影响。结果表明,随着来水频率的增加,两种调水方式对梯级电站的年发电量影响逐渐增大,平、枯、特枯年份两种调水方式的电量损失比例分别为6.59%、8.03%、10.14%和6.08%、6.97%、8.24%;“年内均匀调水”方式对枯水期的发电影响较大,相较于“丰水期多调枯水期少调”方式会进一步加剧西南水电大省在电力供应方面的“丰裕枯缺”矛盾;该模型可为跨流域调水工程论证决策提供技术支持。

In order to study the impact of inter basin water transfer project on the power generation and power structure of cascade hydropower stations in the downstream basin,this paper established the power generation impact analysis model of inter basin water transfer project by choosing the two objectives of maximizing the minimum output and maximum annual power generation of cascade hydropower stations in dry season.The progressive optimality algorithm was used solve the model.Taking the inter basin water transfer project in Southwest China as an example,the annual power generation and its structure of cascade hydropower stations with"uniform water transfer within the year"and"more water transfer in wet season and less water transfer in dry season"were studied.The results show that with the increase of water inflow frequency,the impact of the two water transfer modes on the annual power generation of cascade hydropower stations gradually increases.The power loss ratios of the two water transfer modes in normal,dry and extra dry years are 6.59%,8.03%,10.14%and 6.08%,6.97%and 8.24%respectively;The mode of"uniform water transfer within the year"has a great impact on power generation in dry season.Compared with the mode of"more water transfer in wet season and less water transfer in dry season",it will further aggravate the contradiction of"abundance and shortage"in power supply in southwest hydropower province.The model can provide technical support for demonstration and decision-making of inter basin water transfer projects.