天然气门站计量监控系统的设计与实现

发布时间：2018-03-24 20:13

本文选题：天然气门站　切入点：流量计量　出处：《西南交通大学》2013年硕士论文

【摘要】：随着我国天然气工业的发展,热值大且无污染的天然气已经成为城市燃气的重要组成部分。天然气门站作为城市天然气供气的入口,肩负着保障城市天然气安全稳定供应以及天然气流量计量等职能。天然气门站计量监控系统配合着门站现场的设备能够高效的完成上述工作,其对于天然气门站的日常生产运营有着重大的意义。本文以西南某天然气公司的门站计量控制系统软硬件升级改造项目为依托,基于可编程逻辑控制器、OPC技术以及功能强大的WinCC组态软件,设计实现了一款上下位机协同工作的自动化程度较高的天然气门站计量监控系统。本论文根据天然气门站的实际需求分析,结合门站工艺流程进行了深入的研究和调查,给出了天然门站计量监控系统的总体设计方案,并完成了系统相应软硬件的设计与实现。本论文首先研究了天然气流量计量的原理和方法,并对基于PLC进行数据采集和流量计量的程序进行编制,完成天然气门站现场级数据存储,数据报警以及球阀控制等任务,同时对下位机软冗余方案进行了介绍。门站监控系统的上位机采用西门子公司的WinCC组态软件进行开发,可以实现门站工艺流程、现场变送器数据、实时及历史数据趋势以及球阀状态等的动态显示,并完成对门站的数据和工作人员权限的管理。为了满足天然气门站实时远程报警的功能需求,本论文设计并实现了基于OPC技术的短消息报警功能。本论文的门站计量监控系统通过对天然气门站现场数据的实时监控和计量,完成球阀控制、数据采集、流量计量、状态监测、数据统计以及短消息报警等功能,实现天然气供应的合理调度及管理的自动化、信息化和网络化,为今后天然气工业控制领域的计量监控系统的设计与开发提供了方法和思路。
[Abstract]:With the development of natural gas industry in China, natural gas with high calorific value and no pollution has become an important part of urban gas. Responsible for ensuring the safe and stable supply of urban natural gas and the functions of natural gas flow metering. The gas gate station metering and monitoring system can efficiently accomplish the above work with the equipment at the gate station site. It is of great significance for the daily production and operation of the gas gate station. This paper relies on the software and hardware upgrade project of the gate station metering control system of a natural gas company in southwest China. Based on the programmable logic controller (PLC) and the powerful WinCC configuration software, a gas gate monitoring system with high degree of automation is designed and implemented. According to the actual demand analysis of the natural gas gate station, combined with the process flow of the gate station, this paper has carried on the thorough research and the investigation, has given the overall design plan of the natural gate station metering and monitoring system. The software and hardware of the system are designed and implemented. Firstly, the principle and method of natural gas Flowmeter are studied, and the program of data acquisition and Flowmeter based on PLC is compiled. The field data storage, data alarm and ball valve control of natural gas gate station are completed, and the soft redundancy scheme of lower computer is introduced. The upper computer of gate station monitoring system is developed by Siemens WinCC configuration software. It can realize the dynamic display of gate station process flow, field transmitter data, real-time and historical data trend and ball valve status, etc. In order to meet the requirement of real-time remote alarm of natural gas station, this paper designs and implements the short message alarm function based on OPC technology. Through the real-time monitoring and measurement of the field data of the natural gas gate station, the gate-station metering monitoring system in this paper completes the functions of ball valve control, data acquisition, flow metering, state monitoring, data statistics and short message alarm, etc. It can realize the automation, information and network of the reasonable dispatching and management of natural gas supply, and provide the method and thought for the design and development of the metering and monitoring system in the field of natural gas industry control in the future.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TP277

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