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July 27, 2009

 

 

 
 

 

 

 

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ACCURACY TESTING
 

ETESA (Panama), EVN (Vietnam) and Transelectrica (Romania), where QuickStab® is used in real-time dispatching and operations planning, performed extensive tests aimed at validating the accuracy and reliability of QuickStab's calculations. The testing results and the validation methodology are documented in the Chapter 3 of the book Real-Time Stability in Power Systems. Techniques for Early Detection of the Risk of Blackout, Springer-Verlag, ISBN 0-387-25626-1 Series: Power Electronics and Power Systems (approximate date of publication: October, 2005).

The following example illustrates just one of the many test cases evaluated by ETESA.

Animated Sequence of Speedometers

System generation increases from normal operating conditions (Case 1) to stability limit (Case 2) and then to instability (Case 3)
 

Comparison with PSS/E Calculations
 

Case 1: starting from a 798 MW load-flow computed with PSS/E, QuickStab® predicted instability if the combined total system generation and imports would exceed 909 MW

Case 2: a 906 MW load-flow was solved with PSS/E by using the "critical" MW generation schedules computed by QuickStab® for Case 1. This new load-flow was found "critically stable", i.e., immediately before instability, by QuickStab®

Case 3 (931 MW): more load-flows were run until PSS/E diverged. The last converged solution was obtained at 931 MW. This case was found unstable by QuickStab®

 

Download full text of the accuracy testing report prepared by ETESA
 

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