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

ABB Corporate Research Mats Larsson / / 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

ABB Corporate Research Mats Larsson / / 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

ABB Corporate Research Mats Larsson / / 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 Tap Controlled LoadGenerator Voltage Overload limit reached Tap Changer Control

ABB Corporate Research Mats Larsson / / 5 ABB  2001 ABB Corporate Research Ltd, Baden, Switzerland Control Objectives  Stabilize all voltages within 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

ABB Corporate Research Mats Larsson / / 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

ABB Corporate Research Mats Larsson / / 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

ABB Corporate Research Mats Larsson / / 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 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)

ABB Corporate Research Mats Larsson / / 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