Expert System for Natural Gas Transportation Network Jonny Carlos da Silva, D. Eng. Gilson Simões...
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Transcript of Expert System for Natural Gas Transportation Network Jonny Carlos da Silva, D. Eng. Gilson Simões...
Expert System for Natural Gas Transportation Network
Jonny Carlos da Silva, D. Eng.
Gilson Simões Porciúncula, M. Eng.
SCGÁS TBG
Partners
Rio Pipeline Conference and Exposition 2003
Overview:
Context
Objectives and contributions
SEGRED Functions
Project development
System Description
System Expansion
Conclusion
Context : Remote Monitoring of process variables according to contract rules
Hundreds of continuous variables (such as pressure, flow, temperature, and discrete variables) are monitored in some points of the pipeline
SEGRED General Information
Period: 2 years (Jan. 2001 to Dec. 2002)
Project Team LASHIP Knowledge Engineering Team - 12 members
including 2 professors, 6 engineers (4 MSc), 4 undergraduate students
Plus Domain Experts from the Partnering Companies
Investment: US$ 220,000
TBG Networks in Brazil
TBG - responsible for operating the largest gas pipeline in Latin America on Brazilian soil.
Its pipeline covers more than 3,000 km, it runs from Santa Cruz, in Bolivia, up to Rio Grande do Sul, in Brazil.
Objectives
Development of software to support
operation and maintenance
management of natural gas
transportation networks, integrating
experts systems and dynamic
simulation.
Contributions• reduction of operational costs • increase reliability• improve maintenance and operation• organize part of the corporative memory
Context Pipeline TBG/DVS South Division- Santa Catarina State
First mapped sector
TBG/DVS
Araucária
Joinville
Guaramirim
GasparBrusque
TijucasBiguaçu
Focus on CITY GATE
Analysis of current operational state
Diagnosis – failures detection and maintenance
recommendations.
Prognosis – Capacity to predict the network
behavior based on dynamic simulation.
Generation of reports for maintenance
Acquisition of process variables
SEGRED Functions:
SEGRED Structure
Expert System Environment
USER
AMESimSimulation System
Graphical Interface
AgentModule
Application Domain
Diagnosis Module
Integration between Expert System and Simulator
Configuration scenarios
Validation process
variables
Analysis and prognosis
of failures with generation of suggestions
operational
failures diagnosis and generation of
procedures for maintenance
Agent Maintenance
Module
System development :
Agent Concept-
Expert System and Simulation Software
Two Phase process:
SEGRED system defines parameter for simulation, i.e. different scenarios configurations
it analyzes the simulation data and infers problems that may occur in the networks.
CITY GATE
Consumer
SEGRED- Prognosis based on Dynamic Simulation
Consumer affected
Closing Valve
Distribution Network Model
Prognosis REPORT for different Consumers
Example of Knowledge ModelingDiagnostic Function- FTA
Station delivers gas under unregulated
pressure, and temperature below
limit
Failure of station global function
Heating System water temp below 80°C
Reducing Pressure System Valve lost action
of control
Failure of partial (subsystems) functions
PCV1A Unregulated above of set of the
PCV1Á
Absence of gas of utility or inferior the 35,5 psig .
PCV1A with the valve of relief of camera opened
Failure of Component Function
TC51 unregulated for temperature low
TC51 damaged due to low
temperature
PCV1A Valve with diaphragm of the pilots breached
Prototype DescriptionConfiguration and Evaluation of the operational scenario
Prototype Description
Prognosis Based on DYNAMIC SIMULATION
Analysis Evaluation of current network state.
If upstream pressure in some City Gate (Delivery Station) is lower than a minimum defined by design, that station will not properly deliver gas.
If upstream pressure in some ECOMP (Compressing Station) is below its limit a decrease in the station efficiency will occur.
If gas demand in some City Gate is lower than the specified value a malfunction can take place. Usually, pressure control valves decrease their accuracy.
Prototype Description
Some rules implemented
CityGate Diagnosis
Subsystems Failure
Subsystems Diagnosis
Pressure Control System Possible Failures
FailureModes
Diagnosis Report
SEGRED II Phase
Linebreak Detection
Bottleneck Detection
Composition Module Tracking
Increase of system topology- REPLAN-
GUARAREMA stretch
Based on its successful outcome, the
SEGRED Project will be expanded.
In this second phase, TBG and Petrobras
defined a new scope, including new
functions to be added, such as:
Conclusion
The integration between expert systems and dynamic
simulation is a synergic solution for operation of gas networks.
The SEGRED-TBG system will become an innovative tool in the
area of management of natural gas transportation, able to be
expanded for all network.
REPLAN
Guararema
NEWSector
More Information
SEGRED project Websitewww.laship.ufsc.br/
segred