结合塔式太阳能热发电系统中主要设备的机理模型和变工况下的运行方式,建立一套能完整反映电站工作过程的性能模型。发电系统在太阳法向直射辐照度扰动下的动态过程研究结果表明：吸热器出口熔盐温度、表面最高温度、散热功率的过渡过程较平缓,效率在瞬时突变后会逐渐恢复到接近扰动发生前的水平;吸热器出口熔盐温度、表面最高温度、散热功率与太阳法向直射辐照度的变化基本呈正比关系,效率随太阳法向直射辐照度的增大而升高但斜率逐渐减小。发电系统对电网负荷特性的适应能力研究结果表明：机组在热态启动方式下更适合带早高峰,而在温态启动方式下更适合带晚高峰,高峰时段附近的天气状况对机组带早晚高峰负荷的能力具有明显影响。
Abstract
Combining the mechanism model of the main equipment in the solar power tower system with the operating modes under variable working conditions, a performance model that can simulate the entire working process of the power station is developed. The simulation study on the dynamic process of the power system under direct normal irradiance disturbance shows that the transition process of the molten salt outlet temperature, the maximum surface temperature and the heat dissipation power of the receiver is relatively smooth while the efficiency returns gradually to the level before a sudden change; the molten salt outlet temperature, the maximum surface temperature and the heat dissipation power of the receiver are basically proportional to the changes in direct normal irradiance; the efficiency grows with increase in direct normal irradiance, and however, the slope gradually decreases. The simulation study on the adaptability of the power system to the load characteristics of state grid indicates that the system is more suitable for morning rush hours in hot startup mode while it is more suitable for night rush hours in warm startup mode; the weather conditions during rush hours obviously affect the load carrying capacity.
关键词
塔式太阳能热发电 /
太阳能集热器 /
动态仿真 /
带负荷能力
Key words
solar power tower generation /
solar concentrators /
dynamic simulation /
load carrying capacity
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