State-of-the-Art Review on Control Strategies for Solar Collector System Outlet Temperature in Concentrated Solar Power Plants

光热发电(Concentrated Solar Power, CSP)作为一种兼具可再生能源特性与可调度能力的发电技术，在全球能源结构转型中扮演着重要角色。其中，集热系统传热流体(Heat Transfer Fluid, HTF)的出口温度控制是保障光热电站高效稳定运行的核心技术之一，其控制性能直接影响系统的发电效率、储能特性及关键设备的寿命。在此背景下，本文首先分析了出口温度控制的关键挑战，包括太阳辐照波动、传热滞后性和多变量耦合等问题；随后综述了集热系统温度控制策略的国内外应用现状；最后探讨了当前光热发电的新趋势，并对集热系统控制策略的未来发展方向提出展望，以期为光热发电集热系统出口工质温度的稳定跟踪控制提供参考。Concentrated Solar Power (CSP), as a renewable energy technology with dispatchable capabilities, plays a significant role in the global energy transition. Among its components, the outlet temperature control of the Heat Transfer Fluid (HTF) in the solar collector system represents a core technology for ensuring the efficient and stable operation of CSP plants. Its control performance directly impacts system power generation efficiency, energy storage characteristics, and the lifespan of critical equipment. Against this backdrop, this paper first analyzes the key challenges in outlet temperature control, including solar irradiance fluctuations, heat transfer hysteresis, and multivariable coupling. Subsequently, it reviews the current applications of temperature control strategies for solar collector systems both domestically and internationally. Finally, it explores emerging trends in CSP and proposes future directions for the development of collector system control strategies, aiming to provide insights for achieving stable tracking control of the outlet working fluid temperature in CSP collector systems.