大规模水光互补远距离外送工程经济性研究与案例分析

Economic Research and Case Analyses of Large-scale Hydro-Photovoltaic Hybrid Power Generation Project Including Long-distance Power Transmission

建立了考虑水库调节能力、光伏发电特点以及远距离输电成本的量化分析模型,对水光联合开发装机配比进行研究。结果表明,库容系数达到季调节以上,装机利用小时数在4000 h左右的水电站,搭配同等容量的光伏电站,可显著改善开发外送经济性,而对于具备日调节能力,装机利用小时数在6000 h左右的水电,按照1∶0.3的水光装机容量比打捆外送,具备较好的经济性。在此基础上,以非洲的复兴大坝水电站和英加水电站为例,进行了运行模拟和经济性计算,结果表明复兴大坝水光互补方案经济性较单独开发相比大为改善,英加水电站适当打捆光伏也可提高外送经济性。

A quantitative analysis model considering reservoir regulation capacity,photovoltaic power generation characteristics and long-distance transmission cost is established to study the installed capacity ratio of hydro and photovoltaic power of the hydro-photovoltaic hybrid power project.The results indicate that,(a)for the hydropower station with a seasonal regulating or longer regulating period reservoir and annual generation time of about 4000 hours,a hydro-photovoltaic installed capacity ratio of 1∶1 can significantly improve the economics of project;and(b)for the hydropower station with daily regulating capacity reservoir and annual generation time of about 6000 hours,the optimal hydro-photovoltaic installed capacity ratio is about 1∶0.3.Two cases of GDHA and Inga hydropower projects in Africa are studied by the model,and the calculation results show that the economics of hydro-photovoltaic complement scheme for GDHA hydropower project can be greatly improved compared with independent hydropower development,and the economics of transmission project of Inga hydropower project combined with appropriate photovoltaic installed capacity can also be improved.