基于PLC的M-LNG撬裝站站控系統(tǒng)的研究與開發(fā)
發(fā)布時(shí)間：2018-12-17 04:56
【摘要】：我國(guó)天然氣資源分布非常廣泛,呈現(xiàn)西多東少的分布趨勢(shì),且大多數(shù)是小型離散氣田,地處偏遠(yuǎn)地帶,單井產(chǎn)氣量低,導(dǎo)致可開采的天然氣資源得不到充分的利用。近些年,為了充分利用這部分資源,具有靈活移動(dòng)、拆裝方便、體積小、建廠周期短等優(yōu)勢(shì)的小型可移動(dòng)式LNG撬裝裝置備受矚目。因此,本課題運(yùn)用自動(dòng)化控制技術(shù),結(jié)合天然氣的物理、化學(xué)性質(zhì)和天然氣生產(chǎn)的專業(yè)知識(shí),對(duì)這一裝置及其關(guān)鍵實(shí)現(xiàn)技術(shù)進(jìn)行了較深入的研究,并以SIEMENS S7-200 Smart PLC為核心,開發(fā)了相應(yīng)的站控系統(tǒng),主要內(nèi)容如下：首先,在分析了國(guó)內(nèi)外天然氣液化裝置的設(shè)計(jì)及液化流程的基礎(chǔ)上,完成小型可移動(dòng)式LNG撬裝站的工藝流程設(shè)計(jì),并根據(jù)天然氣液化的工藝流程與生產(chǎn)信息,以及LNG撬裝站對(duì)站控系統(tǒng)的需求,提出小型M-LNG撬裝站站控系統(tǒng)的體系架構(gòu)。在此結(jié)構(gòu)上,規(guī)劃站控系統(tǒng)的硬件結(jié)構(gòu),完成現(xiàn)場(chǎng)設(shè)備單元的各類儀表選型,過程控制單元的主要硬件選型和硬件接線設(shè)計(jì),監(jiān)控管理單元的軟件設(shè)計(jì)方案。其次,針對(duì)氣田工作環(huán)境惡劣,且撬裝站生產(chǎn)信息數(shù)據(jù)量大的特點(diǎn),提出了基于以太網(wǎng)的數(shù)據(jù)交換方案,該方案采取了兩套通信線路,一套是采用TCP/IP協(xié)議,通過以太網(wǎng)接口來完成上位機(jī)與PL、PLC與PLC之間、PLC與下位機(jī)之間的通信,另一套是使用無線路由器,實(shí)現(xiàn)控制系統(tǒng)與監(jiān)控系統(tǒng)之間的實(shí)時(shí)數(shù)據(jù)交換。最后,根據(jù)站控系統(tǒng)的控制要求,完成PLC控制單元的軟件編寫,并通過MATLAB仿真軟件對(duì)PID控制進(jìn)行仿真,完成基于組態(tài)王的上位機(jī)以及基于Smart 700IE的下位機(jī)的監(jiān)控畫面的創(chuàng)建,完成基于Modbus RTU主從站協(xié)議通信的通信協(xié)議編寫,實(shí)現(xiàn)小型LNG撬裝站站控系統(tǒng)的開發(fā),并通過試驗(yàn)應(yīng)用,證實(shí)了系統(tǒng)的適用性。
[Abstract]:The distribution of natural gas resources in China is very extensive, showing a tendency of distribution in the west, more in the east and less in the east, and most of them are small discrete gas fields, which are located in remote areas and have low gas production per well, which leads to the insufficient utilization of the recoverable natural gas resources. In recent years, in order to make full use of this part of resources, small portable LNG prying devices with advantages of flexible movement, convenient disassembly and assembly, small size and short construction period have attracted much attention. Therefore, with the application of automatic control technology, combined with the physical and chemical properties of natural gas and the specialized knowledge of natural gas production, this paper makes a deep research on this device and its key technologies, and takes SIEMENS S7-200 Smart PLC as the core. The corresponding station control system is developed. The main contents are as follows: firstly, on the basis of analyzing the design and liquefaction process of domestic and foreign natural gas liquefaction equipment, the process design of small portable LNG prying station is completed. According to the process flow and production information of natural gas liquefaction, as well as the demand of LNG prying station for station control system, the system architecture of small M-LNG prying station control system is put forward. In this structure, we plan the hardware structure of the station control system, complete all kinds of instrument selection of the field equipment unit, the main hardware selection and the hardware wiring design of the process control unit, and the software design scheme of the monitoring management unit. Secondly, in view of the bad working environment in the gas field and the large amount of production information in the prying station, a data exchange scheme based on Ethernet is put forward, which adopts two sets of communication circuits, one of which is based on TCP/IP protocol. The communication between host computer and PL,PLC and between PLC and lower computer is accomplished through Ethernet interface. Another set is to use wireless router to realize real-time data exchange between control system and monitoring system. Finally, according to the control requirements of the station control system, the software of the PLC control unit is written, and the PID control is simulated by the MATLAB simulation software. The upper computer based on Kingview and the monitoring screen of the lower computer based on Smart 700IE are created. The communication protocol based on Modbus RTU master-slave protocol communication is completed, and the development of small LNG prying station control system is realized. The applicability of the system is proved through the experiment and application.
【學(xué)位授予單位】：寧夏大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TE978;TP273
本文編號(hào)：2383688
[Abstract]:The distribution of natural gas resources in China is very extensive, showing a tendency of distribution in the west, more in the east and less in the east, and most of them are small discrete gas fields, which are located in remote areas and have low gas production per well, which leads to the insufficient utilization of the recoverable natural gas resources. In recent years, in order to make full use of this part of resources, small portable LNG prying devices with advantages of flexible movement, convenient disassembly and assembly, small size and short construction period have attracted much attention. Therefore, with the application of automatic control technology, combined with the physical and chemical properties of natural gas and the specialized knowledge of natural gas production, this paper makes a deep research on this device and its key technologies, and takes SIEMENS S7-200 Smart PLC as the core. The corresponding station control system is developed. The main contents are as follows: firstly, on the basis of analyzing the design and liquefaction process of domestic and foreign natural gas liquefaction equipment, the process design of small portable LNG prying station is completed. According to the process flow and production information of natural gas liquefaction, as well as the demand of LNG prying station for station control system, the system architecture of small M-LNG prying station control system is put forward. In this structure, we plan the hardware structure of the station control system, complete all kinds of instrument selection of the field equipment unit, the main hardware selection and the hardware wiring design of the process control unit, and the software design scheme of the monitoring management unit. Secondly, in view of the bad working environment in the gas field and the large amount of production information in the prying station, a data exchange scheme based on Ethernet is put forward, which adopts two sets of communication circuits, one of which is based on TCP/IP protocol. The communication between host computer and PL,PLC and between PLC and lower computer is accomplished through Ethernet interface. Another set is to use wireless router to realize real-time data exchange between control system and monitoring system. Finally, according to the control requirements of the station control system, the software of the PLC control unit is written, and the PID control is simulated by the MATLAB simulation software. The upper computer based on Kingview and the monitoring screen of the lower computer based on Smart 700IE are created. The communication protocol based on Modbus RTU master-slave protocol communication is completed, and the development of small LNG prying station control system is realized. The applicability of the system is proved through the experiment and application.
【學(xué)位授予單位】：寧夏大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TE978;TP273
【引證文獻(xiàn)】
相關(guān)會(huì)議論文 前1條
1 陳莉;;PLC在油田撬裝式設(shè)備中的應(yīng)用[A];山東省石油學(xué)會(huì)油田電力、通信及自動(dòng)化技術(shù)研討會(huì)優(yōu)秀工程技術(shù)論文集[C];2009年
，本文編號(hào)：2383688
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