对水电效益影响最小的水光互补运行方式研究

Research on hydro-photovoltaic complementary rules for minimum influence on hydropower benefit

为解决水光互补之后光伏消纳率低的问题,在水光日内互补调度规则的基础上,充分考虑水电和光伏的互补特性,提出了水光月内互补调度规则,利用梯级水库的可调节性能适应光伏出力曲线。采用水光月内互补调度规则对澜沧江上游西藏段梯级水电站进行了互补后梯级水电站出力过程和光伏消纳率计算,结果表明,水光互补之后,水电与光电的合计发电量从55.835亿kW·h上升到了59.189亿kW·h,互补后的发电增益量为33.54亿kW·h,光伏消纳率提高了20%。

In order to solve the problem of low photovoltaic absorption rate after water-solar complementation,the water-solar intra-month complementary scheduling rule was proposed for the first time on the basis of the water-solar intra-day complementarity rule.The complementary characteristics of hydropower and photovoltaics were fully considered by the scheduling rule,and the adjustable performance of cascade reservoirs was adapted to the photovoltaic output curve.Based on the water-solar complementary scheduling rules,taking the cascade power station in the Tibet section of the upper reaches of the Lancang River as an example,the calculation of the output process of the cascade power station and the photovoltaic consumption rate were carried out after complementation.The analysis results show that after the water-solar complementation,the total power generation of hydropower and photovoltaics increases from 55.835 billion kW·h to 59.189 billion kW·h,and the power generation gain after complementation is 3.354 billion kW·h,indicating a 20%increase of photovoltaic absorption rate.