皮带输煤冗余控制系统的设计与研究

发布时间：2018-12-12 19:57

【摘要】：当前,西门子PLC自动化控制器在皮带输煤控制系统得到了广泛的应用。首先它可以为火力发电厂管理层的决策提供真实、可靠的实时数据,能够实时的显示出发电机组在一定负荷运转下的燃煤情况。其次,它具有可靠性高、实用性强、抗干扰能力强并且扩展灵活性大等特点。因此,它的广泛应用可以大大降低在投产运行过程中工人所付出的的劳动强度,同时亦便于扩展和设备优化升级。使用冗余系统可以避免因系统维护或者一个错误、误动作,而导致系统停止运行或出现更大的故障。虽然冗余系统成本高,但是相比于错误停机造成的损失,采用冗余系统是有必要的。电厂输煤控制系统中的PLC主机系统一般都选择冗余配置CPU以及网络通信模块的工作方式,而其中的西门子S7-414H系统中拥有着所有的SIMATIC S7具有的先进性,引领冗余控制系统的发展潮流。本文结合某电厂皮带输煤系统项目,对西门子S7-414H冗余控制系统在皮带输煤中的应用进行了全面的探讨。本文对系统的硬件和软件进行了系统的设计研究与配置,最终确定了一套以PLC冗余控制系统为核心的控制方案。在该方案中,采用了开放性强、可靠性高、且易于扩展的集散型系统结构;这套冗余控制系统配置包括:电源、CPU、通讯模块以及工控机等,这样可以极大的提高系统在生产运行中的可靠性、稳定性;同时,上位机控制系统具有友好的人机显示操作界面,整个系统的检测以及运行操作全部在上位机实现,并且通过西门子WinCC软件、工控机以及鼠标、键盘等对整个过程进行显示和操作。该冗余控制系统还具有联锁保护控制功能,它可以及时准确的显示故障的发生时间、地点及原因,并对故障以及操作记录进行保存。这样就使整个控制过程的运行更加稳定,并且该系统还具有故障处理、运行参数监测、设备调节、报警信号发出、控制系统及设备在故障状况下的保护处理等功能。实际应用证明,皮带输煤冗余控制系统在生产过程中还是很值得应用的。
[Abstract]:At present, Siemens PLC automatic controller has been widely used in belt coal conveyance control system. First of all, it can provide real and reliable real-time data for the decision of the management of thermal power plant, and can show the coal-burning situation of the generator set under certain load operation in real time. Secondly, it has the characteristics of high reliability, strong practicability, strong anti-interference ability and large expansion flexibility. Therefore, its wide application can greatly reduce the labor intensity paid by the workers in the process of production and operation, at the same time, it is convenient for expansion and equipment optimization and upgrading. The use of redundant systems can avoid system maintenance or an error, misoperation, resulting in the system to stop running or cause a greater failure. Although the cost of redundant system is high, it is necessary to adopt redundant system compared with the loss caused by error shutdown. The PLC host system in the coal conveyance control system of power plant generally chooses the redundant configuration CPU and the network communication module working mode, but the Siemens S7-414H system has all the advanced nature of SIMATIC S7. Lead the development of redundant control system. In this paper, the application of Siemens S7-414H redundant control system in belt coal conveyance system is discussed in the light of the project of belt coal transportation system in a power plant. In this paper, the hardware and software of the system are designed and configured, and a set of control scheme with PLC redundancy control system as the core is determined. In this scheme, the distributed system structure, which is open, reliable and easy to expand, is adopted. This redundant control system configuration includes: power supply, CPU, communication module and industrial control computer, which can greatly improve the reliability and stability of the system in production and operation; At the same time, the upper computer control system has a friendly man-machine display operation interface, the whole system detection and operation are implemented in the upper computer, and through Siemens WinCC software, industrial control computer and mouse, Keyboard and so on the entire process of display and operation. The redundancy control system also has the function of interlocking protection. It can display the time, place and cause of the fault in time and accurately, and keep the fault and operation record. In this way, the operation of the whole control process is more stable, and the system also has the functions of fault processing, operation parameter monitoring, equipment adjusting, alarm signal issuing, control system and equipment protection processing under the condition of fault, etc. The practical application proves that the redundant control system for belt conveying coal is worth applying in the production process.
【学位授予单位】：河北工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD634;TP273

【相似文献】