导　　师： 桂卫华

学科专业： 081101

授予学位： 硕士

作　　者： ;

机构地区： 中南大学

摘　　要： 随着天然气开发和使用规模的不断扩大，天然气输配系统也日趋庞大和复杂。使得人们掌握输配管网的运行规律和分析处理、输配管网的事故工况，准确、实时地对天然气进行计量监控都变得十分困难。因此迫切需要一种新型的、先进的天然气输配站的计算机监控系统。本文根据顺南天然气输配站存在的问题，开发了对计量点分散计量，集中查询与管理的监控系统，实现了对现场输配情况的自动检测和远程监控，完成了对天然气输配管网稳态／动态仿真，达到天然气输配管网调度优化运行，提高了天然气的利用率。 本文根据顺南天然气输配管网的结构，对其进行计算机硬件总体结构，对现场各计量点的信号采用ADS125芯片进行数据采集，设计测量信号传送中的抗干扰措施，通过组态软件MCGS进行接口参数设置和远程通讯设计，按照计量标准(SY／T6143---1996)中的规定，实现对天然气的实时计量，流量累计和历史参数的存储与管理。 本文给出了顺南天然气输配站计算机监控软件的总体结构，据国际标准天然因子，体积流量算法和补偿技术用MCGS组态软件对天然气计量进行脚本程序设计，对双机热备份检测过程进行软件编制，对计量监控系统进行数据库管理，便于快速把握天然气产、供、销的运行情况和分析决策。 最后，本文针对在输配管网线中的气体力学计算问题，利用数值分析法中的雅可比矩阵和特征线法，建立了天然气输配管网中稳态／动态仿真模型，采用MCGS组态软件对输配管网稳态／动态进行仿真，实现了天然气输配管网调度优化运行，使监控系统的运行更加精确、可靠、功能更强。 该监控系统已投入运行，经局技术监督处鉴定，天然气计量精度高于国家规定的天然气一级计量标准，可靠性高，达到工程设计要求。 When the development scale of natural gas is larger and larger, gas transmission and distribution system is bigger and more complicated. It is not easy for people to master the running regulation of pipe-network, to monitor ,control, analysis and treatment the process condition of pipe-network,to measure the natural gas precisely. It is necessary to develop a new and advanced computer monitor system for nature gas station. The paper analysis the main problem of ShunNan nature gas station ,develop a distribute measure central query, manage and monitor system, realize the process condition automatic detection and remote monitoring, complete steady-state simulation and dynamic simulation of pipe-network, optimize the nature gas scheduling, enhance the gas usage efficiency.The paper based on the structure of ShunNan gas pipe-network, complete holistic design of computer hardware, collect site signal and data of evey measure point by ADS125 chip, design anti-jamming way during the measured-signal transmission process, setup interface parameters and design long-distance communication based on configuration soft MCGS, according to the rule of measure standard SY//T6143—1996, realize the on time measure, add up flux and history parameters storage and management of nature gas.The paper complete holistic design of ShunNan nature gas station computer monitoring soft, according to international standard about savageness gene, based on configuration soft MCGS design script programmer for nature gas measure with volume flux arithmetic and compensate technology, develop soft about measure process with two computer hot standby, manage the database of measure monitoring system. It is easy to master the production, provide, sell running condition of nature gas, and it is easy to make decision and analysis.At last, the paper aim at the gas flux calculation problem in gas pipe-net, take advantage of numerical method's Jacobian matrix and method of characteristics, built the steady-state simulation and dynamic simulation model, realize the simulation by configuration soft MCGS, optimize the nature gas scheduling. It is more precise, reliable during the running of the monitoring system with stronger function.The monitoring system have been run, identified by technology supervise section of bureau, the measure precision of nature gas is more precise than the first class measure of nature standard, reliable , and satisfy the engineering need.

关 键 词： 流量补偿 数据采集 稳态仿真 动态仿真

分 类 号： [TP273]

领　　域： [自动化与计算机技术] [自动化与计算机技术]