变电站综合自动化论文.doc

摘要 为保证供电的质量和电力系统可靠与经济的运行，各级调度中心必须及时了解各厂站端的实时数据信息，并及时发出准确的调度命令。远动终端（RTU）就是安装在各厂站端，采集所在变电站表征电力系统运行状态的模拟量和状态量监视并向调度中心传送这些模拟量和状态量执行调度中心发往所在变电站的控制和调节命令ABSTRACT In order to ensure the quality of power supply and power system reliability and economy of operation, the dispatch center at all levels must keep abreast of the end points of the plant real-time data information. Remote terminal unit (RTU) is installed in the factory-side station, substation Acquisition Characterization of the host running the power system simulation and state capacity to monitor and control center to send the amount and status of these simulation volume, the Executive sent to the dispatch center where substation control and regulation of the order. This article was completed in order to exchange computer-based sampling technique for the design of distributed RTU devices. First, a brief introduction of the electric power system automation of data collection and monitoring as well as the RTU of the significance of the development situation, discusses the prospects for its application and significance； then distributed provides an overview of the design ideas, and in accordance with the actual situation at the scene of the RTU to reliability design, made anti-interference measures; then discussed the sampling algorithm;Finally, on the application of developed single-chip 80C196KB distributed RTU hardware structure, the key circuit analysis, and software design ideas and the flow chart of the major software modules were introduced. Key words：emote Terminal; Substation; RTU; Telemetering; Telesignalling; Telecontrol. 目录 1 绪论 1 1.1 引言 1 1.2 RTU的基本原理 2 1.3 RTU的发展 4 1.4 本论文研究的主要内容及意义 5 2 RTU的总体设计 7 2.1 RTU模块与RS-485网络的连接 7 2.2 主要技术指标 8 2.3 主要功能及实现方法 9 2.4 可靠性设计 10 3 电力参数计算原理及计算方法 12 3.1 引言 12 3.2 交流采样算法分析 13 3.3 交流采样误差分析 20 4 RTU的硬件设计 22 4.1 硬件电路的设计思路 22 4.2 硬件的总体结构 23 4.3 数据采集模块硬件电路 25 4.4 频率检测电路 30 4.5 看门狗电路设计 31 4.6 实时时钟模块 32 4.7 通信模块 33 4.8 开关量输入电路(遥信部分) 34 4.9 开关量输出电路(遥控部分) 35 4.10键盘显示的