西南跨流域水风光协同开发研究

Trans-basin Complementary Planning of Hydro-wind-photovoltaic Systems in Southwest China

随着风、光新能源装机占比逐渐提高,电力系统灵活性需求不断增加,对水电发挥灵活调节能力提出了更高要求,仅在电站或流域层面开展水风光协同开发难以充分发挥水电灵活性价值,无法满足系统调节需求。因此,需要从系统层面出发,开展跨流域水风光协同开发研究,通过扩大水风光互补范围,最大程度发挥水电调节能力作用。通过构建跨流域水风光协同规划模型,量化分析西南地区八大流域干流水电可支撑新能源开发消纳的潜力。结果表明,与流域级水风光协同开发相比,西南地区跨流域水风光协同开发可大幅提升新能源装机规模及消纳电量,且在支撑西南地区本地新能源开发的基础上,具备支撑西北地区新能源开发、实现灵活调节资源跨区共享的潜力。

With the booming scale of new energy integration and the increasing demand for flexibility regulation resources,hydropower flexibility is expected to play an important role in power systems.Complementary planning of hydro-windphotovoltaic systems at the plant-level or basin-level is not conducive to maximizing the flexibility value,which means system flexibility requirements may not be met.Therefore,it is necessary to expand the scope of hydro-wind-photovoltaic complementation and carry out trans-basin planning from the perspective of the power system.By constructing a trans-basin hydro-wind-photovoltaic coordinated planning model,this paper quantitatively analyzes the integration potential of new energy supported by hydropower in southwest China.Results show that,compared with basin-level coordinated planning,transbasin planning can significantly increase the installed capacity and generation of new energy in southwest China.Furthermore,hydropower flexibility in the southwest can also be shared to support the development of new energy in northwest China,realizing flexible regulation resources sharing across regions.