光热电站容量效益评估及影响因素研究

The capacity benefit evaluation of CSP power station and its influencing factors

光热发电配置储热后具有良好的调节性能和跨日调节能力,使得光热机组有一定替代常规机组带负荷的能力,即容量效益。由于光热发电容量效益与光热电站的运行方式、储热时长等因素密切相关,如何评估光热发电容量效益对光热发电的未来发展具有重要作用。文中提出一种基于等可靠性的光热电站容量效益评估方法,考虑了调峰方式、储热时长、新能源规模、光热规模对容量效益发挥的影响,采用基于数学优化的生产模拟仿真程序,以周为尺度,计算全年8760 h的系统运行状态,计及了机组启停、水电跨日调节、抽蓄跨日调节、光热电站的跨日调节等因素。通过对西北地区实际电网的仿真,验证了所提方法的有效性。

As concentrating solar power(CSP)is equipped with heat storage,it has good regulation performance and the ability to regulate across the day.CSP units have the ability to replace conventional units,which is called as capacity benefits.Since the benefit of CSP capacity is closely related to factors,such as operation mode and heat storage duration of CSP stations,the benefit evaluating of CSP capacity plays an important role in the future development of CSP.A method for evaluating the benefit of CSP stations on the basis of equal reliability is proposed.It takes into account the effects of peak shaving method,heat storage duration,new energy scale and CSP scale.The production simulation program calculates the system operating status of 8760 hours throughout the year on a weekly scale,taking into account factors such as unit start-stop,hydro-electrical day-to-day adjustment,pumped-storage day-to-day adjustment and day-to-day adjustment of CSP stations.Finally,the effectiveness of the proposed method is verified by simulations of the actual power grid in the northwestern region,which shows that CSP stations have capacity benefits.