黄藏寺水库水光互补日内优化调度研究

Research on Optimal Operation of Huangzangsi Reservoir's Hydro⁃PV Complementation in Days

黄藏寺水库是黑河上游首座综合利用型水库,在青海省新能源政策支持下,配套建设光伏电站,形成水电、光电复杂互补系统。采用PVsyst软件完成100 MW光伏电站设计,提出以出力曲线波动次数、最大出力变幅和出力占比为指标的日出力聚类方法。以提高水光互补系统出力稳定和梯级水电站发电效益为目标,建立黄藏寺水库日内优化调度模型,采用NSGA-Ⅱ算法求解。结果表明,多云天气、梯级水电站调峰发电、黄藏寺水库装机容量和调度水量限制是影响水光互补系统出力稳定的主要因素;黄藏寺水库补偿光电出力时下泄流量产生小幅波动,补偿梯级水电站调峰发电时产生大流量来水过程,宝瓶河和龙首二级电站分别承担小幅波动稳流和莺落峡断面全天候平稳过流要求;水光互补模式对黄藏寺水库水电效益影响很小,稳定光电出力波动作用显著,但应进一步优化光伏电站容量配置。

Huangzangsi Reservoir is the first comprehensive utilization reservoir in the upper reaches of the Heihe River.Supported by the new energy policy of Qinghai Province,if the Huangzangsi Reservoir is equipped with photovoltaic power stations,a complex complementary system of hydropower and photovoltaic power generation in the upper reaches of the Heihe River will be formed.This study used PVsyst soft-ware to complete the design of a 100 MW photovoltaic plant,and proposed a daily output clustering method based on the number of output curve fluctuations,maximum output change and output proportion as indicators.A daily optimal operation model for Huangzangsi Reservoir was established with the goal of stabilizing the output of the Hydro-PV complementary system and improving the power generation revenue of cascade hydropower stations and solved by using the NSGA-Ⅱ.The results indicate that cloudy weather,peak shaving power generation by cascade hydropower stations,installed capacity of Huangzangsi Reservoir and water volume limitations that can be regulated are the main fac-tors affecting the stability of the output of the Hydro-PV complementary system;When the Huangzangsi Reservoir compensates for photovolta-ic output,the outgoing flow has a small fluctuation,this fluctuation is absorbed by the Baopinghe Hydropower Station;When the Huangzang-si Reservoir compensates for the cascade hydropower station peaking and power generation,the upstream produces a large flow of incoming water,Longshou-ⅡHydropower Station ensures that the Yingluoxia section has a stable flow throughout the day;The Hydro-PV complemen-tary mode has a small impact on the hydropower benefits of Huangzangsi Reservoir and has a significant effect on stabilizing the fluctuation of photovoltaic output,however,the capacity configuration of photovoltaic power stations should be further optimized.