槽型抛物面太阳能热发电系统在国内典型地区的仿真分析与对比研究

Simulation of parabolic trough solar power generating system for typical Chinese sites

作为一种适宜于大规模并网发电的太阳能转换技术,槽型抛物面太阳能热发电日益成为国际上的研究和应用热点。我国内蒙古地区由于同时具有充足的直射辐射资源、广阔的未利用土地,以及较为便捷的基础设施等有利条件,适合作为未来建设太阳能电站的候选地点加以考虑。以内蒙古奈曼地区为背景,以TRN-SYS软件为工具,建立了35 MW槽型抛物面太阳能电站的模型,通过系统仿真的方法对电站的运行性能进行了分析,借此探讨该项技术在我国典型地区的可行性;为比较不同气象条件对系统的影响,选择了西藏拉萨地区对相同的电站系统进行了模拟和比较。结果表明,由于太阳能资源的差别,奈曼和拉萨两地电站的年发电量分别为37 271.10 MW.h和66 541.08 MW.h,两者相差78.5%。提出了入射直射辐射强度IDR这一概念,并通过系统仿真得出其比目前国际上通行的直射辐射强度DNI更加适宜作为聚焦式太阳能电站的太阳能资源评估指标。

Parabolic trough solar power （PTSP） is pursued worldwide, for it is suitable to generate grid power from solar energy. With abundant solar energy resources, large waste land and complete infrastructure, the Inner Mongolia Autonomous Region can be selected as a candidate to locate the PTSP plant in the future. In this paper, a PTSP plant of 35 MW was simulated with Solar Thermal Electric Components （STEC） model in the environment of TRNSYS （version 16） for Naiman, a county in Inner Mongolia, to study feasibility of this technology in typical sites in China. Also a same plant located in Lhasa, Tibet, was simulated and the results were compared with those of Naiman, to study the influence of different weather condition to the system performance. The results indicate that the annual elec- tricity output of Naiman plant is 37 271.10 MW＂ h, 78.5 % lower than that of Lhasa plant, 66 541.08 MW- h. Also this paper raises the definition of Incident Direct Insolation （IDR）, and verified from simulation that it is more suitable than DNI to evaluate the solar resource for a certain site to locate concentrating solar power plant.