New Developments on ABB Test Case

1
New Developments onABB Test Case
Mats Larsson
2
Preview

• The ABB Power Grid Test Case
• Modelica Files
• Simulink Files
• C/C Interface
• Report of Ongoing Work at ETH
• QA during presentation

3
The ABB Power Grid Test Case

• Disturbance Input
• Line trip
• Discrete Step Controls
• Tap changer reference voltage
• Load Shedding
• Capacitor Switching
• Hybrid Behaviour
• Generator overload protection
• Transformer Relay Control
• Nonlinearity
• sign change in tap changer control

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Collapse Scenario

• Line tripping (L3) after 100 s
• Inherent Load Recovery
• Tap Changer Tries to Restore Voltage
• Generator field limit activated at 286 s
• Collapse

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Control Objectives

• Stabilize all voltages within 0.9 - 1.1 p.u.
• Use minimal amount of load shedding
• Control voltage at bus 4 as close as possible to
  1 p.u.
• Capacitor and tap changer control can be used
  freely

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Modelica Version

• Easiest way to work on model gt Dymola 4.2a
• New test cases will be constructed out of block
  library
• Used to generate Simulink and C version
• HTML Documentation containing all model equations
• Control algorithms can be written in Modelica or
  external C/Fortran code

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Simulink Version

• Only inputs and outputs available (can be
  extended upon request)
• Only works under Windows
• Can be used for verification of control schemes
  written in Matlab

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C/C Version

• Simple API to DSBlocks generated by Dymola
• Model Compiles with gcc and Visual C 6.0 under
  Windows
• Much faster than Simulink Interface
• Model Structure
• There is a family of functions f,g,h depending
  on the state of the system
• Zero-crossing functions can be used to anticipate
  discrete changes (not yet implemented)

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Conclusion

• First test case almost finished
• Still some work on C/C interface
• Larger examples possible