【作者】 张小平；

【导师】 吕国芳； 史恒；

【作者基本信息】 河海大学 ， 控制理论与控制工程， 2007， 硕士

【摘要】 现地控制单元是水电厂监控系统的重要组成部分，在以专用PLC为基础的现地控制装置中，采用通信管理模件与单元内调速装置，励磁装置和继电保护装置的通信是一种有效的现场通信解决方案。本课题是以金智科技水电事业部的现地控制装置的升级改造项目为背景，针对工程实际需求而进行的对该装置的研究与开发。本文首先界定了通信管理模件在现地控制单元中的地位，完成功能需求分析，根据功能需求确定出模件采用嵌入式系统平台；其次，对比分析了目前主流的嵌入式系统解决方案，选择出VxWorks作为本模件的操作系统；然后，根据本模件的应用需求和接口要求确定了硬件结构平台，并完成VxWorks向硬件平台的移植，构建了本模件基础运行开发环境；接着，使用结构化分析方法对应用软件进行系统分析，根据系统分析，开始在本模件的基础运行开发环境中设计开发流程，并详细设计系统调试模块的循环队列结构；最后对本模件的发展趋势进行探讨，提出在电力系统通信规约向统一化的过渡过程中，本模件的一种可能存在形式——IEC 61850网关的结构。本文对软件的构成细节进行了详细研究，希望对其它嵌入式系统应用软件的开发提供一定的参考。更多还原

【Abstract】 Local Control Unit (LCU) was an important component in Hydropower Plant Monitoring and Controlling System. Communicating with governor, exciter, relay devices via Communications Management Module was an effective solution in a Special-PLC based LCU device.Developing this device/module was a part of the LCU-upgrading-project from Hydro Division of Wiscom System. Firstly, the functions of Communications Management Module in LCU were defined, then functional requirements analysis was completed, and embedded system platform was choose under the functional requirements. Secondly, VxWorks was selected as the operating system on this module after comparative analysis of the current mainstream Embedded System Solutions. Thirdly, hardware platform was created according to the module’s application needs and interface requirements, then VxWorks was ported to this hardware platform, and then the application software development environment was established. Fourthly, the structural analysis was used for application software analysis. According to the software’s system analysis, the application software was developed in the module’s software development environment, especially, the design of a circular queue structure used in system debugging agent sub-module was described here. Finally, the development trend of Communications Management Module was discussed, and this module may exist in a form of IEC 61850 Gateway before IEC 61850 became universal standard in power system.A detailed study on embedded system software design was included in this paper, which would be helpful on the other embedded system software development.更多还原