1. ABB Corporate Research Mats Larsson / 2002-02-18 / 1  2002 ABB Corporate Research Ltd, Baden, Switzerland New Developments on ABB Test Case Mats Larsson

2. ABB Corporate Research Mats Larsson / 07.10.2001 / 2 ABB  2001 ABB Corporate Research Ltd, Baden, Switzerland Preview  The ABB Power Grid Test Case  Modelica Files  Simulink Files  C/C++ Interface  Report of Ongoing Work at ETH  Q&A during presentation

3. ABB Corporate Research Mats Larsson / 07.10.2001 / 3 ABB  2001 ABB Corporate Research Ltd, Baden, Switzerland 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

4. ABB Corporate Research Mats Larsson / 07.10.2001 / 4 ABB  2001 ABB Corporate Research Ltd, Baden, Switzerland 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 0100200300400 0.9 0.95 1 1.05 Tap Controlled LoadGenerator Voltage Overload limit reached Tap Changer Control

5. ABB Corporate Research Mats Larsson / 07.10.2001 / 5 ABB  2001 ABB Corporate Research Ltd, Baden, Switzerland 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

6. ABB Corporate Research Mats Larsson / 07.10.2001 / 6 ABB  2001 ABB Corporate Research Ltd, Baden, Switzerland Modelica Version  Easiest way to work on model => 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

7. ABB Corporate Research Mats Larsson / 07.10.2001 / 7 ABB  2001 ABB Corporate Research Ltd, Baden, Switzerland 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

8. ABB Corporate Research Mats Larsson / 07.10.2001 / 8 ABB  2001 ABB Corporate Research Ltd, Baden, Switzerland 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)

9. ABB Corporate Research Mats Larsson / 07.10.2001 / 9 ABB  2001 ABB Corporate Research Ltd, Baden, Switzerland Conclusion  First test case almost finished  Still some work on C/C++ interface  Larger examples possible