西门子现场总线在电厂输煤控制系统的应用.docVIP

摘要关键词 ABSTRACT PROFIBUS field bus technology is with the development of the digital signal system, it is the worlds first open field bus standard, its application field covers from mechanical processing, process control, electric power, traffic to building automation fields. PROFIBUS-DP is an optimized module, have higher data transfer rate, applied to the communication between system and external equipment, especially suitable for the remote I/O system. It allows high speed periodic small batch data communication, suitable for high automation demands on time. This design is the application of Siemens field bus in power plant coal conveying system, power plant coal conveying system is the important process of the electric power production in power plants. Thermal power plant coal conveying system of process equipment layout is highly decentralized, single furnace boiler problem of accurate measurement of single grinding of coal has been affect the cost of power generation is equilibrium statistical problems, especially coal calorific value and statistical calculation of boiler combustion efficiency is still unable to solve intractable problems. And field bus technology for highly decentralized, electromagnetic interference, big equipment has its unique advantages, thus conveying system can be used with the DCS remote I / 0 bus mode of intelligent communication module bus pattern with the combination of control mode, advanced technology, improve the level of the coal conveying control system. This design for the project in two steps, first coal conveying control system renovation, and then the soft measurement of the coal and coal into the furnace. In order to ultimately achieve instantaneous single furnace fuel metering and dynamic production cost accounting purpose. Keywords Coal handling system,PCS,Profibus-DP 目 录 摘 要 I ABSTRACT II 1 绪论 2 2 输煤段工艺及控制要求 3 2.1输煤系统的组成 3 2.2输煤段工艺简介 3 2.3输煤控制方案 4 2.3.1输煤系统的特点 4 2.3.2控制方案描述 5 3 Profibus-DP协议 6 3.1 Profi