水工质吸热器温度调控系统建模及冗余网络控制系统设计
发布时间：2019-01-06 06:03
【摘要】：随着我国能源结构的调整,太阳能作为一种可再生清洁能源得到了大力发展。太阳能热发电是太阳能开发利用的主要形式之一,我国在“十三五”时期将建设一批太阳能光热电站,其中包括多座塔式太阳能热发电站。吸热器作为塔式太阳能热发电系统光热转换的关键设备,其稳定高效运行对整个电站的经济性能有着重要影响。本文以水工质吸热器为研究对象,对吸热器特性、控制方法以及控制系统的实时性与可靠性进行研究,主要完成了以下工作:(1)本文通过对水工质吸热器的结构分析,根据能量守恒与质量守恒定律,将水工质吸热器吸热管沿轴向和径向进行离散化,建立了吸热器的分段集总参数模型,结合吸热器的工艺参数,建立了不同输入量对吸热器出口温度的传递函数模型。通过对水工质入口温度、给水流量以及太阳辐照量等输入条件变化时吸热器出口温度变化的仿真分析,得出了吸热器的动态特性。(2)基于水工质吸热器的模型,分析现有吸热器控制方案的缺陷,本文提出了给水流量与定日镜场类选择性控制的控制系统结构,该结构结合了给水流量控制快速性调节与镜场大范围调节的特点,满足了不同工况下的控制要求。同时,本文提出运用多目标瞄准策略,通过调控定日镜,解决吸热器受热不均的问题。针对PID控制方法对吸热器控制的局限性,本文提出将广义预测的改进算法用于吸热器的出口温度控制,通过Matlab仿真控制,得出了较好的控制效果。(3)为了保证控制系统的实时性与可靠性,本文提出了控制系统的三层冗余网络结构(CAN网络层,以太网层,光纤环网层),并设计了三层冗余网络的关键设备岛控制器。通过三层网络对数据的逐层打包,保证了控制系统的实时性。通过网络冗余结构的设计,保证了控制系统的可靠性。在此基础上,搭建了三层冗余网络的实验平台,对其进行测试,验证其实时性与可靠性。最后应用于实际项目,达到了预期的效果。
[Abstract]:With the adjustment of energy structure in China, solar energy as a renewable clean energy has been greatly developed. Solar thermal power generation is one of the main forms of solar energy development and utilization. During the 13th Five-Year Plan period, a number of solar photothermal power stations, including many tower solar thermal power stations, will be built in China. As the key equipment of photothermal conversion in the tower solar thermal power generation system, the stable and efficient operation of the absorber has an important impact on the economic performance of the whole power plant. In this paper, the characteristics of the absorber, the control method and the real-time and reliability of the control system are studied. The main work is as follows: (1) the structure of the water absorber is analyzed in this paper. According to the law of conservation of energy and mass, the heat absorption pipe of water absorber is discretized along axial and radial direction, and the piecewise lumped parameter model of the absorber is established, and the process parameters of the absorber are combined. The transfer function model of different input amount to the outlet temperature of heat absorber is established. Based on the simulation analysis of the inlet temperature of the water working fluid, the flow rate of water and the solar radiation, the dynamic characteristics of the absorber are obtained. (2) based on the model of the water refrigerant absorber, Based on the analysis of the defects of the existing control schemes of the absorber, the structure of the control system for the feed water flow and the selective control of the helioscope field is proposed in this paper. The structure combines the characteristics of the fast regulation of the feed water flow control and the wide range adjustment of the mirror field. The control requirements under different working conditions are satisfied. At the same time, the multi-target aiming strategy is used to solve the problem of uneven heating of the absorber by adjusting the sun-fixing mirror. In view of the limitation of the PID control method to the heat absorber, the improved generalized predictive algorithm is applied to the outlet temperature control of the heat absorber, which is controlled by Matlab simulation. In order to ensure the real-time and reliability of the control system, this paper proposes a three-layer redundant network structure (CAN network layer, Ethernet layer, fiber ring layer). The key equipment island controller of three-layer redundant network is designed. The real-time control system is guaranteed by three-layer network. The reliability of the control system is ensured by the design of the network redundancy structure. On this basis, the experiment platform of three layers redundant network is built and tested to verify its real-time and reliability. Finally, it is applied to the actual project, and the expected effect is achieved.
【学位授予单位】：西安理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP273;TM615
本文编号：2402436
[Abstract]:With the adjustment of energy structure in China, solar energy as a renewable clean energy has been greatly developed. Solar thermal power generation is one of the main forms of solar energy development and utilization. During the 13th Five-Year Plan period, a number of solar photothermal power stations, including many tower solar thermal power stations, will be built in China. As the key equipment of photothermal conversion in the tower solar thermal power generation system, the stable and efficient operation of the absorber has an important impact on the economic performance of the whole power plant. In this paper, the characteristics of the absorber, the control method and the real-time and reliability of the control system are studied. The main work is as follows: (1) the structure of the water absorber is analyzed in this paper. According to the law of conservation of energy and mass, the heat absorption pipe of water absorber is discretized along axial and radial direction, and the piecewise lumped parameter model of the absorber is established, and the process parameters of the absorber are combined. The transfer function model of different input amount to the outlet temperature of heat absorber is established. Based on the simulation analysis of the inlet temperature of the water working fluid, the flow rate of water and the solar radiation, the dynamic characteristics of the absorber are obtained. (2) based on the model of the water refrigerant absorber, Based on the analysis of the defects of the existing control schemes of the absorber, the structure of the control system for the feed water flow and the selective control of the helioscope field is proposed in this paper. The structure combines the characteristics of the fast regulation of the feed water flow control and the wide range adjustment of the mirror field. The control requirements under different working conditions are satisfied. At the same time, the multi-target aiming strategy is used to solve the problem of uneven heating of the absorber by adjusting the sun-fixing mirror. In view of the limitation of the PID control method to the heat absorber, the improved generalized predictive algorithm is applied to the outlet temperature control of the heat absorber, which is controlled by Matlab simulation. In order to ensure the real-time and reliability of the control system, this paper proposes a three-layer redundant network structure (CAN network layer, Ethernet layer, fiber ring layer). The key equipment island controller of three-layer redundant network is designed. The real-time control system is guaranteed by three-layer network. The reliability of the control system is ensured by the design of the network redundancy structure. On this basis, the experiment platform of three layers redundant network is built and tested to verify its real-time and reliability. Finally, it is applied to the actual project, and the expected effect is achieved.
【学位授予单位】：西安理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP273;TM615
【参考文献】
相关期刊论文 前10条
1 刘世隆;邓薇;;塔式太阳能热发电技术在我国发展现状与前景分析[J];电气技术;2016年10期
2 盛玲霞;李佳燕;赵豫红;;塔式太阳能电站接收器的建模及动态仿真[J];化工学报;2016年03期
3 王松鹤;丁维明;王伟;;过热汽温的非线性广义预测控制与优化[J];动力工程学报;2015年09期
4 李雪如;李通;;太阳能热发电系统的建模与控制[J];轻工科技;2014年08期
5 吕亚锋;郭利进;成立存;;基于动态矩阵控制的聚合釜温度控制与仿真[J];计算机仿真;2014年07期
6 李青;白凤武;张亚南;;碳化硅泡沫陶瓷空气吸热器性能数值模拟[J];化工学报;2014年S1期
7 刘梓媛;马平;;磨煤机负荷控制系统模型算法控制的实现[J];华电技术;2013年11期
8 陈静;刘建忠;沈望俊;周俊虎;岑可法;;太阳能热发电系统的研究现状综述[J];热力发电;2012年04期
9 薛美盛;张旭东;王川;;电站锅炉一次风压系统模型算法控制仿真研究[J];化工自动化及仪表;2012年01期
10 史冬云;刘劲松;白晓威;;光伏发电技术现状、存在问题及对策[J];吉林电力;2011年06期
相关硕士学位论文 前7条
1 李佳燕;太阳能热发电系统接收器的建模仿真及控制算法研究[D];浙江大学;2015年
2 陈将;塔式太阳能热电系统的聚光仿真与聚焦策略优化[D];浙江大学;2015年
3 邹琴梅;塔式太阳能熔盐吸热器的传热特性研究与设计[D];浙江大学;2014年
4 杜瑶;广义预测控制算法在协调控制系统中的应用研究[D];华北电力大学;2014年
5 张峰;一种多功能工业控制系统的设计与实现[D];南京邮电大学;2013年
6 李雅哲;塔式太阳能热发电蒸汽系统建模与控制[D];华北电力大学（北京）;2011年
7 陈秋凤;网络控制系统的分析与控制研究[D];中南大学;2009年
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