SOUTH PARS GAS COMPLEX-IRAN - sose2012.eu · SOUTH PARS GAS COMPLEX-IRAN Introduction Unit specification: Compressors: TwoTwo similar reciprocating type; manufactured by NuovoPignoneitaly

SOUTH PARS GAS COMPLEX-IRAN

Authors:

Elaheh Esfandiari jahromi Salahedin Sadeghifard Leili Esmaeilani Rasul Shabanian

P t d bP t d b El h h E f di i J h iEl h h E f di i J h iPresented byPresented by: Elaheh Esfandiari Jahromi: Elaheh Esfandiari Jahromi


Index

1. Introductionh b l f ll l b d2. The possibility of all alarms observation and

analyze in “Monitoring System”3. Modification in alarms that were sent to DCS4. Decreasing the number of trips by temperature 4 g p y p

transmitter adjustment and hardware problem rectification

5. Monitoring system upgrading6 conclusion6. conclusion


IntroductionIntroduction

Unit specification:pCompressors:

Two similar reciprocating type; manufactured by Two similar reciprocating type; manufactured by Nuovo Pignone italy

PLC t ll PLC controller:MODICON of Schneider family, quantum series

programming software: Concept the monitoring system software :complicity.the monitoring system software :complicity.




IntroductionConsequent result of each Trip

Introduction

Decreasing Production Rate Increasing Acid Gas Flaring Serious Damage to the compressor equipment and Serious Damage to the compressor, equipment and accessories

Bad affect on environment and human health Bad affect on environment and human health Presence of Maintenance personnel during each

start up



According to the shutdown operation reports :“The number of these trips per year> 27”p p y 7

To make a solution for these shutdownsTo make a solution for these shutdowns

“Checking all the alarm lists in both DCS system and HMI in each shutdown “


Introduction


The possibility of all alarms observation and analyze in “Monitoring System”

MCC Fault as an consequent factor not main trip factorfactor

Sending false alarm as a Common alarm Sending false alarm as a Common alarm represented for a group of alarms

Not working Hardware redundancy for all trip signals signals

l t d f


common alarm represented a group of alarms


Previous and recent status of blocks in logic

First Logic to distinguish healthy channel among two redundant channelsamong two redundant channels


Necessary modifications in order to "healthy channel selection" logic correctionhealthy channel selection logic correction

SOUTH PARS GAS COMLPEX-IRAN

Modification in alarms that were sent to DCS

Necessity of sending real alarm list on time from UCP to y gDCS for operation team to rectify the consequence of trips as soon as possible

P i L i f di di i l i l d l DCS


Primary Logic for sending digital signals and alarms to DCSAdding more vital signals to mod bus list according to operation

requestrequest


Applied modification to send more signals to DCS instead of spares


First Logic for distinguishing first‐out alarmFirst out alarm from UCP to DCS did not sent correctlyFirst out alarm from UCP to DCS did not sent correctly


Corrected Logic for distinguishing first‐out alarmalarm

SOUTH PARS GAS COMLPEX-IRAN

Temperature transmitter adjustment and hardware problem rectification

This part of modification Decreased number of trips caused by TTs and RTD sensorscaused by TTs and RTD sensors

Dedicating most trips to temperature transmitters Dedicating most trips to temperature transmitters when RTD tip braked

Change the setting of these transmitters


Temperature transmitter adjustment


Analog input channel problem

Problem: No alarm or fault status of di i f h i f disconnecting one of the transmitters, from input modulesp

S l ti tti ll d i t ith Solution: putting a pull down resistance with the value of 2MΩ between negative and positive input channel


Monitoring system upgradingUpgrading HMI and replacing old hardware was inevitable because of following reasons:because of following reasons:

Urgent components are not found in market Impossibility of doing any edition and modification on Impossibility of doing any edition and modification on HMI

Using non industrial computers with long life componentsUsing non industrial computers with long life components Not being user friendly of old operating system Not automatic start up the computer to run cimplicityNot automatic start up the computer to run cimplicityservices and mentioned project

Continues locking this system Co ues oc g s sys e


Optimization steps

Suitable and industrial hardware selection with long life components

Installation required softwares(win2000 and Installation required softwares(win2000 and proper antivirus, SQL software and Enterprise, complete cimplicity version and development co p ete c p c ty e s o a d de e op e tlicense)

investigation on communication files investigation on communication files Data base description and adjustment


Optimization stepsTransferring the project to the new

d d upgraded systemCreating printer queue bottom in HMI Creating printer queue bottom in HMI Limit the user’s accessibility Auto restart and auto log on capability without instrument personnel presence and p ppassword


ConclusionSignificant reduction in the number of unwanted

h td b fi di l ti f h shutdowns by finding proper solutions for each cause.

bl h easiness troubleshooting quick maintenance permanent monitoring possibility from far from the compressor station without maintenance ppersonnel

security enhancement of monitoring system security enhancement of monitoring system


THANKS A LOT

Documents

SOUTH PARS GAS COMPLEX-IRAN - sose2012.eu · SOUTH PARS GAS COMPLEX-IRAN Introduction Unit specification: Compressors: TwoTwo similar reciprocating type; manufactured by NuovoPignoneitaly