【作者】 任涛；

【导师】 赵豫红；

【作者基本信息】 浙江大学 ， 控制科学与工程， 2015， 硕士

【摘要】 塔式太阳能发电是大规模太阳能发电中最为经济的方式之一。由于太阳辐射的不稳定性和间歇性,电站的稳定并网发电对其运行过程有着很高的要求。同时,提高系统效率、增强安全性也有助于实现太阳能发电的规模化应用。因此,对塔式太阳能热电系统进行模拟并对其运行过程进行优化具有十分重要的意义。本文对塔式太阳能热电系统进行了模拟和运行优化方面的研究。论文的主要工作如下：(1)根据TSA(PHOEBUS Technology Program Solar Air Receiver)热电系统主要模块的动态数学模型,分析TSA热电系统在不同工况下的运行特征,建立TSA热电系统整体模型,采用联立方程法进行求解,对TSA热电系统的运行状况进行仿真。(2)分析Solar Two塔式太阳能热电系统,建立Solar Two热电系统主要模块,包括接收器、冷/热盐罐和蒸汽发生器的动态数学模型,给出了Solar Two传热工质熔融硝酸盐主要物性的计算方法。在此基础上基于联立方程法建立了Solar Two热电系统整体模型,对Solar Two热电系统的运行状况进行仿真。(3)考虑市场电价,提出基于联立方程模型的塔式太阳能热电系统运行优化策略。并采用控制变量参数化(CVP)方法求解,在实时电价和固定电价两种交易模式下,分别获得TSA和Solar Two塔式太阳能热电系统的最优控制方案。仿真结果表明,本文建立的TSA和Solar Two热电系统整体模型能够反映系统特性,且仿真速度较快；提出的基于联立方程模型的塔式太阳能热电系统运行优化策略与现有方法相比,能使电站获得更大的收益。更多还原

【Abstract】 The solar tower thermal power technology is one of the most economical ways to produce solar electricity in large scale. Because of the intermittency and instability of solar energy, it raises high demand for the power plant to stabilize the power generation. Meanwhile, it’s necessary to improve the system efficiency and security in order to achieve large-scale usage of solar power technology. Therefore, it is extremely significant to simulate tower solar thermal system and to optimize its operation.In this thesis, the simulation and operation strategy optimization method of solar tower thermal power system are studied. The main contributions of this thesis are as follows.(1) The characteristics of TSA(PHOEBUS Technology Program Solar Air Receiver) thermal power system in different operation modes are analyzed, and the overall model of TSA thermal power systems is established by the simultaneous equations method, based on dynamic mathematical models of subsystems. Moreover, the dynamic characteristics of the overall model are studied by simulation.(2) The characteristics of Solar Two thermal power system are analyzed, then dynamic mathematical models of subsystems including receiver, cold/hot tank and steam generator are developed and the main physical properties of molten nitrate are calculated. Then, the overall model of Solar Two thermal power systems is established by the simultaneous equations method, and the dynamic characteristics of the overall model are studied by simulation.(3) With electricity price taken into consideration, an operation strategy optimization method is proposed based on the simultaneous mechanism model of the solar tower power plant. The Control Vector Parameterization approach is adopted to solve the optimization problem, so that the optimal control schemes of TSA and Solar Two thermal power systems are obtained in the trading modes of real-time price and fixed price.The simulation results demonstrate that the developed overall models of TSA and Solar Two are able to describe the characteristics of the systems with fast simulation speed, and the proposed operation strategy optimization method can make solar tower plants obtain the maximum benefit.更多还原