集散控制系统在管道阴极保护中的应用

Q4 Engineering

工程设计学报 Pub Date : 2014-06-16 DOI:10.1155/2014/681908

Gopalakrishnan Jayapalan, G. Agnihotri, D. Deshpande

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引用次数: 7

摘要

大多数跨国管道系统的压缩站都采用集散控制系统。所有中间清管(IP)站/分段阀(SV)站都使用可编程逻辑控制器(PLC)来收集现场数据并控制远程执行阀。介绍了DCS或PLC在燃气管道阴极保护中的应用。这里使用虚拟仪器(VI)软件进行仿真和实时实现。DCS/PLC提供的模拟输入通道可以利用半电池和电压传感器测量管土电位(PSP)。在DCS中可用的逻辑块可以作为低选择开关来选择最低的PSP。可采用DCS/PLC中的比例积分(PI)控制器进行控制。PI控制器输出改变交流相位控制器的发射角度。相位控制器输出经过整流、滤波，并作为阴极保护电流馈送到管道。建议方案利用现有基础设施控制管道腐蚀。

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Cathodic Protection of Pipeline Using Distributed Control System

Distributed control system (DCS) is available in most of the compressor stations of cross-country pipeline systems. Programmable logic controller (PLC) is used in all the intermediate pigging (IP) stations/sectional valve (SV) stations to collect the field data and to control the remote actuated valves. This paper presents how DCS or PLC can be used for cathodic protection of gas pipelines. Virtual instrumentation (VI) software is used here for simulation and real-time implementation purpose. Analog input channels available in DCS/PLC can be used to measure pipe to soil potential (PSP) with the help of half-cell and voltage transducer. Logic blocks available in DCS can be used as low selector switch to select the lowest PSP. Proportional-integral (PI) controller available in DCS/PLC can be used for taking the controlling action. PI controller output varies the firing angle of AC phase controller. Phase controller output is rectified, filtered, and fed to the pipeline as cathodic protection current. Proposed scheme utilizes existing infrastructure to control pipeline corrosion.

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来源期刊

工程设计学报 Engineering-Engineering (miscellaneous)

CiteScore

0.60

自引率

0.00%

发文量

2447

审稿时长

14 weeks

期刊介绍： Chinese Journal of Engineering Design is a reputable journal published by Zhejiang University Press Co., Ltd. It was founded in December, 1994 as the first internationally cooperative journal in the area of engineering design research. Administrated by the Ministry of Education of China, it is sponsored by both Zhejiang University and Chinese Society of Mechanical Engineering. Zhejiang University Press Co., Ltd. is fully responsible for its bimonthly domestic and oversea publication. Its page is in A4 size. This journal is devoted to reporting most up-to-date achievements of engineering design researches and therefore, to promote the communications of academic researches and their applications to industry. Achievments of great creativity and practicablity are extraordinarily desirable. Aiming at supplying designers, developers and researchers of diversified technical artifacts with valuable references, its content covers all aspects of design theory and methodology, as well as its enabling environment, for instance, creative design, concurrent design, conceptual design, intelligent design, web-based design, reverse engineering design, industrial design, design optimization, tribology, design by biological analogy, virtual reality in design, structural analysis and design, design knowledge representation, design knowledge management, design decision-making systems, etc.