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© PSI AG, Stadtwerke Düsseldorf GmbH 2008
SimoneCongress 2008, sheet 1
Online simulation of gas distribution networks
Peter Aymanns, Stadtwerke Düsseldorf Netz GmbH, DüsseldorfAndreas Stolte, Dirk Wilms, Wolfgang Dörner, PSI AG, Aschaffenburg
9th SIMONE Congress, October 15-17, 2008, Dubrownik, Croatia
© PSI AG, Stadtwerke Düsseldorf GmbH 2008
SimoneCongress 2008, sheet 2
Contents
Introduction
Network control at Düsseldorf Cityworks
Why online network calculations?
System integration
Example scenarios
Summary
© PSI AG, Stadtwerke Düsseldorf GmbH 2008
SimoneCongress 2008, sheet 3
Network control at Düsseldorf Cityworks
Drinking water network 7 pressure zones
1,740 km total length, 73,700 buildings connected
55,369,000 m³/year sales, 212,760 m³/day max.
District heating network 3 network sections
183 km total length, 4,950 delivery stations
1.6 GWh sales
© PSI AG, Stadtwerke Düsseldorf GmbH 2008
SimoneCongress 2008, sheet 4
Network control at Düsseldorf Cityworks
Electrical power network High, medium and low voltage
9418 km system length, approx. 83,500 buildings connected
4.4 TWh/year sendout; 750 MW peak load
Street lightning About 62,000 electric and 17,000 gas lights
© PSI AG, Stadtwerke Düsseldorf GmbH 2008
SimoneCongress 2008, sheet 5
Network control at Düsseldorf Cityworks
Gas network High-pressure: 20 bar, 4 bar, medium-pressure 900 mbar, low-pressure 42 mbar
1,456 km total length, approx. 54,100 buildings connected, 121,000 meters
7.0 TWh/year sendout (domestic and commercial), 39.4 GWh/d max. day
4.0 – 5.0 TWh/year power plant gas
9 transfer stations, about 270 gas meteringand pressure regulating stations
Gas family: Enriched low-BTU gas
Pressure regulation, no variationof linepack or storage
© PSI AG, Stadtwerke Düsseldorf GmbH 2008
SimoneCongress 2008, sheet 6
Network control at Düsseldorf Cityworks
Combined control center From 2000 merger of the control rooms 2004 to 2005, control centre staff from different
sectors were trained together (Simone was used as a training simulator)
Since 2006 staff of the various sectors work interactively
© PSI AG, Stadtwerke Düsseldorf GmbH 2008
SimoneCongress 2008, sheet 7 Combined energies control room of Stadtwerke Düsseldorf
© PSI AG, Stadtwerke Düsseldorf GmbH 2008
SimoneCongress 2008, sheet 8
Why online network calculations?
Decision-making tool in the evaluation of complex network operations
Planned or unplanned closing of network sections Planned or unplanned closing or partial closing of gas metering
and pressure regulating stations Pressure adjustment in the networks Monitoring of load flow
© PSI AG, Stadtwerke Düsseldorf GmbH 2008
SimoneCongress 2008, sheet 9
Why online network calculations?
Aims in operational management Review of the supply situation for proposed closures Establish the control variables for controlling Evaluate the impacts of changes in the network switching
status Provide information about abnormal conditions in current
operations
© PSI AG, Stadtwerke Düsseldorf GmbH 2008
SimoneCongress 2008, sheet 10
Why online network calculations?
Why integrated calculation Uniformity for all devisions Reduction of various software applications No interfaces to transfer the dynamic operational data No double data maintenance work Intuitive handling of the calculation within uniform user
interface Simple integration of calculation results into operational
decisions Available and applicable at all times
© PSI AG, Stadtwerke Düsseldorf GmbH 2008
SimoneCongress 2008, sheet 11
System integration
© PSI AG, Stadtwerke Düsseldorf GmbH 2008
SimoneCongress 2008, sheet 12
Any Data is put in only once
Data import from third-party systems
Integrated total system, i.e. Highly efficient, faultless data engineering Extreme dynamics Consistent operation and visualization
System integration
Complete integration
Static Data-Modelsfor SCADA, Simulation,
Optimization,etc.
Sharedreal-timeDatabase
Integrativestatic
Data-Model
SCADA-Functions
SimulationOptimization
etc.
Geografic plans
Schematic plans
Station figures
Trend charts
Specific figures
Lists
generator
Import from GIS,SAP IS-U MMI Operating Process Data
© PSI AG, Stadtwerke Düsseldorf GmbH 2008
SimoneCongress 2008, sheet 13
Any Data is put in only once
Data import from third-party systems
Integrated total system, i.e. Highly efficient, faultless data engineering Extreme dynamics Consistent operation and visualization
System integration
Complete integration
Static Data-Modelsfor SCADA, Simulation,
Optimization,etc.
Sharedreal-timeDatabase
Integrativestatic
Data-Model
SCADA-Functions
SimulationOptimization
etc.
Geografic plans
Schematic plans
Station figures
Trend charts
Specific figures
Lists
generator
Import from GIS,SAP IS-U MMI Operating Process Data
© PSI AG, Stadtwerke Düsseldorf GmbH 2008
SimoneCongress 2008, sheet 14
Any Data is put in only once
Data import from third-party systems
Integrated total system, i.e. Highly efficient, faultless data engineering Extreme dynamics Consistent operation and visualization
System integration
Complete integration
Static Data-Modelsfor SCADA, Simulation,
Optimization,etc.
Sharedreal-timeDatabase
Integrativestatic
Data-Model
SCADA-Functions
SimulationOptimization
etc.
Geografic plans
Schematic plans
Station figures
Trend charts
Specific figures
Lists
generator
Import from GIS,SAP IS-U MMI Operating Process Data
© PSI AG, Stadtwerke Düsseldorf GmbH 2008
SimoneCongress 2008, sheet 15
Any Data is put in only once
Data import from third-party systems
Integrated total system, i.e. Highly efficient, faultless data engineering Extreme dynamics Consistent operation and visualization
System integration
Complete integration
Static Data-Modelsfor SCADA, Simulation,
Optimization,etc.
Sharedreal-timeDatabase
Integrativestatic
Data-Model
SCADA-Functions
SimulationOptimization
etc.
Geografic plans
Schematic plans
Station figures
Trend charts
Specific figures
Lists
generator
Import from GIS,SAP IS-U MMI Operating Process Data
© PSI AG, Stadtwerke Düsseldorf GmbH 2008
SimoneCongress 2008, sheet 16
Any Data is put in only once
Data import from third-party systems
Integrated total system, i.e. Highly efficient, faultless data engineering Extreme dynamics Consistent operation and visualization
System integration
Complete integration
Static Data-Modelsfor SCADA, Simulation,
Optimization,etc.
Sharedreal-timeDatabase
Integrativestatic
Data-Model
SCADA-Functions
SimulationOptimization
etc.
Geografic plans
Schematic plans
Station figures
Trend charts
Specific figures
Lists
generator
Import from GIS,SAP IS-U MMI Operating Process Data
© PSI AG, Stadtwerke Düsseldorf GmbH 2008
SimoneCongress 2008, sheet 17
System integration
Common data handling All data stored in control system database
- topology- technical data- figures
Import of GIS data- cyclic incremental into control system database- objects keep their identity- pipes and network equipment- generation of geographic oriented figures
Import of consumption data- cyclic incremental into control system database- annual consumptions from billing system
© PSI AG, Stadtwerke Düsseldorf GmbH 2008
SimoneCongress 2008, sheet 18
System integration
Applications State estimation
- adaption of the load model- calibration tool- determines current flow conditions in the network - information on locations without measurement is available
© PSI AG, Stadtwerke Düsseldorf GmbH 2008
SimoneCongress 2008, sheet 19
System integration
Applications State estimation
- adaption of the load model- calibration tool- determines current flow conditions in the network - information on locations without measurement is available
Look ahead simulation- check network behaviour before a operation is carried out- determines network status for future load and switching szenarios- load forecasts and nominations are considered - improvement of operation mode
© PSI AG, Stadtwerke Düsseldorf GmbH 2008
SimoneCongress 2008, sheet 20
System integration
Visualisation Indication
- display of measured and/or calculated values- indication of discrepancies- indication of alarms
Coloured network diagrams- flow- pressure- velocity- lots of others (diameter, subnet, age ...)
Flow arrows Bubble help for object informations Curves
© PSI AG, Stadtwerke Düsseldorf GmbH 2008
SimoneCongress 2008, sheet 21
Example scenarios
Checking the supply status before taking
the GDR station C78 out of service.
© PSI AG, Stadtwerke Düsseldorf GmbH 2008
SimoneCongress 2008, sheet 22
Initial flow status
Example scenario: station C78 taken out of service
© PSI AG, Stadtwerke Düsseldorf GmbH 2008
SimoneCongress 2008, sheet 23
Flows - C78 out of service
Example scenario: station C78 taken out of service
reverse flowzero flow to C78
© PSI AG, Stadtwerke Düsseldorf GmbH 2008
SimoneCongress 2008, sheet 24
Pressures - C78 out of service
Example scenario: station C78 taken out of service
© PSI AG, Stadtwerke Düsseldorf GmbH 2008
SimoneCongress 2008, sheet 25
Initial pressures
Example scenario: station C78 taken out of service
© PSI AG, Stadtwerke Düsseldorf GmbH 2008
SimoneCongress 2008, sheet 26
Lp pressures - C78 out of service
Example scenario: station C78 taken out of service
© PSI AG, Stadtwerke Düsseldorf GmbH 2008
SimoneCongress 2008, sheet 27
Example scenarios
Determining the effects of
closing hp valve SBN 778
SBN 778
© PSI AG, Stadtwerke Düsseldorf GmbH 2008
SimoneCongress 2008, sheet 28
Initial flow status
Example scenario: closing hp valve SBN 778
SBN 778
B 6
B 8
B 7
© PSI AG, Stadtwerke Düsseldorf GmbH 2008
SimoneCongress 2008, sheet 29
Flows - SBN 778 closed
Example scenario: closing hp valve SBN 778
SBN 778
B 6
B 8
B 7
© PSI AG, Stadtwerke Düsseldorf GmbH 2008
SimoneCongress 2008, sheet 30
Initial Feeding
Example scenario: closing hp valve SBN 778
Feeding - SBN 778 closed
© PSI AG, Stadtwerke Düsseldorf GmbH 2008
SimoneCongress 2008, sheet 31
Velocities - SBN 778 closed
Example scenario: closing hp valve SBN 778
SBN 778
Increased velocity
B 6
B 7
© PSI AG, Stadtwerke Düsseldorf GmbH 2008
SimoneCongress 2008, sheet 32
24/7 Netze GmbH, Mannheim- quasi steady state district heating calculations- instationary / transient gas network calculations
Stadtwerke Düsseldorf Netz GmbH, Düsseldorf- steady state gas network calculations - quasi steady state drinking water network calculations- quasi steady state district heating calculations
Stadtwerke Duisburg Netzgesellschaft mbH, Duisburg- steady state gas network calculations - steady state drinking water network calculations
NRM Netzdienste Rhein-Main GmbH, Frankfurt- instationary / transient gas network calculations
HEAG Südhessische Energie AG, Darmstadt- steady state gas network calculations
SWM Infrastruktur GmbH, München- instationary / transient gas network calculations
E.ON Avacon Netz GmbH, Braunschweig- instationary / transient gas network calculations
Stadtwerke Aachen AG, Aachen- steady state gas network calculations - steady state drinking water network calculations - quasi steady state district heating calculations
References
© PSI AG, Stadtwerke Düsseldorf GmbH 2008
SimoneCongress 2008, sheet 33
Assists operators of distribution networks
State estimation calculates actual flow situation
Look ahead simulation to test operations in advance
Modular software design
Different computing cores available
Uniform data model
Use of GIS data and consumption data
Uniform user interface
Easy to use simulation functions
Powerful visualisation
Summary Integrated online network calculations