Cathodic Protection of Pipeline Using Distributed Control System | Zendy

Gopalakrishnan Jayapalan | Zendy; Ganga Agnihotri | Zendy; D. M. Deshpande | Zendy

AI Assistant Blog Pricing

Home ZAIA Blog

Open Access

Cathodic Protection of Pipeline Using Distributed Control System

Author(s) -

Gopalakrishnan Jayapalan,

Ganga Agnihotri,

D. M. Deshpande

Publication year - 2014

Publication title -

chinese journal of engineering

Language(s) - English

Resource type - Journals

ISSN - 2314-8063

DOI - 10.1155/2014/681908

Subject(s) - programmable logic controller , pigging , pipeline (software) , controller (irrigation) , scada , cathodic protection , engineering , pipeline transport , distributed control system , gas compressor , software , control system , control logic , pid controller , electrical engineering , control engineering , computer science , computer hardware , mechanical engineering , operating system , temperature control , agronomy , chemistry , electrode , electrochemistry , biology

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

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research