【作者】 张涛；

【导师】 雷志勇；

【作者基本信息】 西安工业大学 ， 控制理论与控制工程， 2010， 硕士

【摘要】 汽轮机是电力生产的核心设备之一,一旦出现故障进行停机检修将会给发电企业和电网运行造成损失。随着监测技术的发展,国外出现了一些相关的监测产品,但存在价格昂贵,维修困难,软件操作不便等缺点。论文研究了基于DSP的汽轮机主轴偏心监测系统和监测设备的通信体制,能够对汽轮机主轴偏心情况进行在线监测,及时发现可排除的故障,从而有效降低盲目维修成本。论文的研究对实现汽轮机的实时监测,提高电厂生产效益具有意义。论文从硬件平台和软件功能模块设计出发,提出了汽轮机监测系统的总体设计方案,重点研究了汽轮机偏心监测系统的设计。硬件以DSP为核心处理器,结合汽轮机运行特征与偏心形成机理,从电源电路、信号调理电路、通信电路、报警逻辑等方面进行了设计；软件以CCS为平台,采用功能模块化编程思想,完成了初始化模块、中断模块、A／D模块、通信模块的设计,实现偏心监测板的功能。论文研究了汽轮机监测系统的两级通信体制：第一级通信采用RS-485现场总线技术实现监测系统的内部通信,第二级通信将以太网技术应用于工业控制领域,结合DSP嵌入式特点,设计了一套适合汽轮机监测系统的工业以太网通信协议,实现汽轮机监测系统与上位机的通信。通过对汽轮机偏心监测系统研究,结合振动模拟平台,对汽轮机主轴偏心量进行实时监测,并对结果进行分析。实验结果表明,本文所研制的汽轮机偏心监测系统有较强的实用性和和较高的监测精度；采用工业以太网与RS-485相结合的两级通信,提高了国产系统的通信水平。论文的研究是自主开发产品在电力行业重大设备实时故障监测应用中的有益尝试。更多还原

【Abstract】 Turbine is one of the core equipment of electricity production; an event of a fault will produce huge economic losses and industrial accidents. With the development of monitoring technology, some related monitoring products were appeared in the foreign country. But these products have the disadvantages of expensive, maintenance difficulties, inconvenience operating. According to these problems, a DSP-based turbine monitoring system and the communication system were researched in this paper. The system accurately, reliably and real-time accomplish the turbine eccentricity on-line monitoring, reduce the costs of blind maintenance, promote the productive efficiency and realize the localization of such systems.From the hardware platform and the design of software function modules, we propose the design program of the turbine monitoring system, and focuses research on the turbine eccentric monitoring system. DSP-chip was employed as the core processor. Combined with the turbine operation characteristics and eccentric formation mechanism, the power circuit, signal conditioning circuit, communication and alarm logic were designed. CCS was adopted as the software platform. According to the modular programming idea, the software’s function is performed by the design of initialization, interruption, A/D and communication modules. The two-level communication system of turbine monitoring system was researched. The first-level uses RS-485 field bus technology. The second-level applies Ethernet to industry control field. Combined with the characteristics of the DSP, a monitoring system for steam turbine Industrial Ethernet communication protocol is designed to realize the communication between monitoring system and computer.Combined with the vibration simulation platform, the turbine spindle eccentricity was real-time monitored and the results were analyzed based on the research of the turbine eccentric monitoring system. The results show that, turbine eccentric monitoring system researched in this paper has strong practical and higher monitoring accuracy. The two-lever communication system adopted Industrial Ethernet and RS-485 can promote the communication lever of domestic system. The purpose of this paper is to make the self-development products used in the real-time monitoring system of power industry.更多还原